Arcam A85 User Manual
Service Manual  
A85  
Issue 2.0  
DiVA A85, P85 & P85/3  
Amplifiers  
ARCAM  
The digital pots Z108D and Z108A control the bass and treble  
respectively. This is done by moving the wiper connected to the  
frequency-sensitive impedance between the non-inverting and  
inverting terminals of Z112A, effectively changing the ratio of  
feedback boost and feed-forward attenuation of the circuit at the  
desired frequencies, thus providing a EQ gain control that is  
symmetrical on a logarithmic scale, with the use of a linear pot.  
Pre-amplifier circuit description  
The A85 preamplifier is a high-performance, DC coupled design  
with microprocessor control of input select, two independent tape  
loops, electronic volume control, tone bypass and electronic tone  
control.  
Z112B provides the 6dB of gain necessary to bring the nominal  
signal level back to unity. C116 and C117 remove the 2.5VDC  
offset from the output, to prevent clunks when the tone controls  
are activated.  
It features a discrete power supply and low-noise linear circuitry to  
obtain very good distortion and noise performance, suitable for  
high quality source material such as CD or DVD-A.  
Z108 is controlled by a simple 3-wire serial interface from the  
microprocessor. Each of the digital lines has its own ground return  
to minimise electromagnetic interference. They are connected  
together only at the GND pin of the IC.  
Input switching  
Each of the inputs has a pair of diodes to the ±15V rails to prevent  
static spikes from causing damage to the CMOS multiplexers. In  
addition, there is a simple resistor-capacitor filter with a corner  
frequency of approximately 340kHz to remove any unwanted high  
frequency interference from the signal. This uses high-quality  
polypropylene capacitors for best performance.  
Volume control  
Z107 is a VSDVC electronic volume control IC. It works, in  
conjunction with an external op-amp, by varying the feed-forward  
and feedback resistors in an inverting gain configuration. In this  
way, it can allow output signal swings of up to 22Vpp whilst  
operating from a single +5VDC power supply. Also, it allows the  
user the choice of external circuitry to fine-tune the performance.  
The gain is controlled from the microprocessor via a 3-wire serial  
interface. The analogue supply rail is derived from the local +5V  
via R185 and C156 // C157.  
Z104 and Z105 are the main input select multiplexers, which are  
configured in a ‘virtual earth’ unity gain arrangement with Z115  
and Z116. This arrangement is slightly lower distortion than the  
‘normal’ one, at the cost of a slightly higher noise floor. It is an  
inverting configuration, which is restored to correct polarity by the  
inverting electronic volume control which follows.  
Z115B and Z116B are integrating servos, which take out any DC  
from the input signal before the following stages. The servos are 2-  
pole, with a passive 2nd pole being formed by R180 and C147 (for  
the left channel) to remove broadband noise from the output of the  
servo and improve speed of response.  
Z117 is the output op-amp. Its outputs are decoupled via R186,  
R187, C158 and C159 so that it has a low output impedance but  
can drive cable capacitance without oscillation. R186 and R187  
are included in the audio frequency feedback loop to reduce output  
impedance when driving ‘difficult’ cables.  
Z100 thru Z103 are the input selectors for the 2 tape loops. These  
are normal non-inverting selectors which are buffered before being  
passed on to the phono sockets.  
RLY100 is a mute relay which shunts the preamp output to  
ground. This is to prevent thumps and squeals when the units is  
powered up or down.  
Z109A output is decoupled by R108 which is included in the  
feedback path. Local high frequency feedback occurs around C108  
to allow the tape loop output to be very low impedance, whilst  
being stable into a capacitive load such as may be presented by a  
screened interconnect cable. This is the same for all tape outputs.  
Power supply  
The transformer winding is connected to SK300. The voltage is  
rectified and smoothed by D300, D301, D306, D307 and C300,  
C310. The unregulated voltage should be around ±27VDC. F300  
and F301 are secondary fuses, as the low power preamp winding  
would not blow the primary fuses if short circuited.  
Z106 is configured as a double pole changeover switch, used to  
select the tone controls. The tone controls are bypassed when not  
required so that the noise and distortion can be minimised.  
The voltage regulators are discrete compound emitter followers. I  
will describe the +15V supply as the negative is essentially an  
exact mirror image.  
Tone control circuit  
The tone control circuit is a non-inverting one, using a gyrated  
‘bell’ filter for the bass and a simple shelving filter for the treble.  
Q300 and R300 act as a constant current source, supplying around  
7mA into D310. C302 and C314 reduce ripple and broadband  
noise on the zener diode. Q305 and Q306 form a complementary  
Darlington NPN transistor which is configured as an emitter  
follower, producing the +15VDC at its output. C303 is to provide  
bulk charge storage and to reduce the AC output impedance of the  
power supply. D302 prevents reverse bias of the supply during  
power down.  
Left channel description  
The input is attenuated by 6dB and biased to a voltage of +2.5V  
DC by C111, R113, R112, R110, R111 and C110. This is so the  
signals fall within the  
potentiometer Z108.  
0
-
5VDC required by the digital  
Z301 is a conventional LM317 type circuit to drop the +15V rail  
down to +5V for the tone and volume control circuits.  
Z111B and its associated components form an active equivalent of  
a series resonant LCR circuit. This has an impedance minimum of  
5.4k at around 80Hz with Q=0.7 The reason the bass is done as a  
band-boost filter rather than a shelving filter is so that you can  
boost the ‘real’ bass without causing lots of sub-audio loudspeaker  
cone excursion which wastes power and may damage the drive  
units.  
Star point SP300 explicitly connects the differently named ground  
nets together at one point, to minimise hum.  
Star point SP100 is the ground ‘mecca’ for the entire amplifier  
(comprising all three PCBs within the unit). All of the separately  
named grounds are joined explicitly at this point. Different named  
grounds are used to ensure that no two ‘different’ grounds share  
copper, which could compromise the noise, distortion or crosstalk  
performance of the amplifier.  
Amplifier & PSU Circuit Description  
L882PB is the printed circuit board that provides the power supply  
and output stage amplifiers for the A85 integrated and power  
amplifiers.  
Its function is to:  
The loudspeaker output signals are passed to socket SK106 which  
connects to SK107 and onto the headphone output via the  
attenuation resistors R103 thru R106.  
1.  
2.  
Drive the loudspeakers(!)  
Provide an (always on) auxiliary 5VDC supply for the micro  
controller and display interface  
3.  
4.  
Receive logic signals from the micro controller to turn on  
the main amplifier supply relay (mains) and connect either  
pair of speaker output sockets  
Send logic signals to the micro controller pertaining to the  
state of the amplifiers (short circuit protection, DC offset  
protection, thermal protection)  
Receive and demodulate RC5 remote style control codes via  
the rear panel jack and transmit them to the micro controller  
Send a 12V trigger output via the rear panel jack for control  
of an auxiliary power amp when the unit is on  
Receive a 12V trigger input from the rear jack (for use in the  
power amp only version)  
The hierarchy containing the other sheets is self explanatory. Each  
of the port names shown on the top sheet connects to the port of  
the same name on the lower sheets.  
L882 Circuit Sheet 2  
5.  
6.  
7.  
8.  
This sheet contains the power supplies, the rear panel jack socket  
trigger circuits, the standby relay control and the ‘interface’  
circuits between the output signals of the power amplifiers and the  
inputs expected by the micro processor.  
Drive a pair of headphones via attenuating resistor networks  
The mains input enters the unit at SK203, with capacitors C205  
and C206 acting as conducted RF suppression. The earth  
connection is passed on to the chassis (for safety reasons the  
chassis metalwork remains connected to mains power earth at all  
times). Switch SW200 is the voltage selector switch, allowing the  
unit to be operated in 230V or 115V mains countries by switching  
the dual-primary mains transformers between series and parallel  
winding. Varistors VR200 and VR201 act to prevent over-voltage  
surges from damaging the unit. If the user selects 115V operation  
and then connects the unit to a 230V supply, the varistors will go  
to a low impedance and blow the primary fuses. Any very high  
voltage line transients will also be suppressed, helping to eliminate  
transformer isolation breakdown.  
The power amplifier is a symmetrical, class B, bipolar junction  
transistor output, current-feedback design (of which more later)  
with DC-coupled signal and feedback paths, featuring an active  
integrating voltage servo to control DC offsets.  
It features ‘instantaneous’ safe operating area protection in  
addition to sending a signal to the micro to turn off the output  
relays in the event of user or thermal overload. Since it is a DC-  
coupled design, the unit senses DC at the output and triggers the  
micro to turn off the loudspeaker relays in the event of excessive  
levels (possibly due to a faulty source component or short circuit  
output transistor).  
The output stage uses Sanken specialised ‘audio amplifier’ power  
bipolar Darlington transistors which are optimised for use with this  
type of topology. Consequently the unit has excellent measured  
performance in terms of noise, slew rate, output impedance and  
distortion (harmonic and intermodulated) and is essentially load  
invariant (to a first order the measured performance is independent  
of the load impedance).  
Relay RLY200 switches the primary side of the mains transformer,  
allowing the micro to control the on / off status of the amplifier. Its  
contacts are snubbed by capacitors C207 and C208 (to eliminate  
switching spark transients and prolong relay lifespan). The primary  
windings of the toroidal mains transformer connect to SK204.  
PCB mounted transformer TX200 is powered all the time that  
mains is present on SK203, irrespective of the on / off status of the  
amplifier. This is to ensure that the micro processor is always  
operational and can thus control the mains switching for the main  
amplifier. Secondary fuse F202 limits the current in the event of a  
failure mode, as the short circuit primary current of TX200 would  
be insufficient to blow the mains fuses.  
L882 Circuit Sheet 1  
The audio input to the amplifier is connected to SK102 (which  
connects to the output of the preamp PCB). This signal is passed  
on via SK104A which forms the preamp out connection to the  
outside world.  
Diodes D200 thru D203, C227 and IC201 provide the 5VDC  
supply which powers the micro and display PCB and the relay  
coils. C224 is to reduce diode noise being transmitted back  
through the leakage capacitance of TX200.  
SK104B provides the power amp input connection, with switch  
SW100 selecting between pre / power and integrated modes. The  
unit is wired as a preamp / power amp combination with the switch  
depressed, allowing the user to insert a processor or other function  
(e.g. graphic EQ) between the output of the preamp and the input  
of the power amp. With the switch in the ‘out’ position the power  
amp input socket is ignored and the input to the power amp is  
connected internally to the output of the preamp. PL100 and  
PL101 are ‘handbag’ links fitted to the power amp only version to  
connect both pairs of phono sockets in parallel for daisy chaining  
(as there is no preamp output on a power amp).  
The mains transformer secondary winding is connected to SK200.  
This is a centre tapped winding, and is used with full bridge  
rectifier BR200 to produce the main positive and negative supplies  
for the power amp. C209 and C210 are the large reservoir  
capacitors, with C211 and C212 acting as high frequency  
decouplers. The main power supply rails and ground are accessible  
on SK205 for future module expansion.  
The circuitry around SK201A and IC200 is to receive and  
demodulate remote control commands sent in via the rear panel  
jack socket. This is for multi-room applications.  
L200 and C200 form a parallel resonant circuit at approximately  
37kHz. The output from this bandpass filter is passed into IC200A  
where it is ‘chopped’ and fed to IC200B to provide the output  
signal.  
Relays RLY100 and RLY101 switch the two pairs of loudspeaker  
output sockets and are controlled by the micro lines describes  
above. Transistors TR100 and TR101 operate in ‘constant current  
sink’ mode which allow relay current to be approximately constant  
although the main power supply rails will vary with mains input  
and load conditions. The current is around 20mA per relay.  
SK201B is a 13VDC signal trigger output which is active  
whenever the amplifier is powered up. R218 and DZ207 / C223  
provide a reference voltage which is buffered by TR200. TR201  
and R217 act as a current limit and prevent damage due to a short  
circuit on the output of SK201B. The maximum current is  
approximately 65mA.  
The input to the amplifier is limited to ±5.4V via back-to-back  
zener diodes DZ302 and DZ303. This is to prevent the user from  
grossly overdriving the input to the amplifier and possibly causing  
damage. The diodes appear before series resistor R324 so that their  
variable capacitance does not introduce high frequency harmonic  
distortion.  
TR203 and TR202 are a complementary Darlington pair which  
turn on mains relay RLY200 when activated by a signal from the  
microprocessor.  
R324, R327 and C316 act as an input filter - this is a first order  
low pass filter with a corner frequency of around 340kHz to  
prevent RF signals from being injected into the front end of the  
amplifier. The corner frequency was chosen such that the phase  
shift introduced is less than 5 at 20kHz (considered by the AES  
to be the minimum perceptible relative amount by the human ear).  
The input impedance of the amplifier is 23kW at DC, falling to  
around 14kW at 20kHz.  
TR204 and its associated components are to detect whenever AC  
mains is present at the IEC socket. This is to notify the  
microprocessor if the user has unplugged the mains cord, so that it  
can take the necessary action (muting all the outputs and switching  
off the mains relay). The reservoir capacitors should last at least 4  
mains cycles which gives the microprocessor plenty of time for a  
controlled shutdown.  
Operational amplifier IC300A is acting as a non-inverting gain of  
2, driving the input signal into a 44W impedance to ground via  
R322 and R337. Its output voltage will be an accurate  
amplification of its input voltage (i.e. the signal on pin 1 should  
look identical to that on pin 3 but at twice the amplitude). The op-  
amp is used in a slightly unusual configuration here, in that its  
power supply pins are used as a (current) output, and its output pin  
is used as a (current) feedback.  
TR204 forms a monostable circuit. Each cycle of AC turns on  
TR204 via R211. TR204 then ‘shunts’ C229 ensuring that it is  
kept at a low potential. If more than one mains cycle is missing,  
then R219 charges up C229 sufficiently to trigger Schmitt inverter  
IC202E thus passing on a logic signal to the microprocessor. The  
use of a Schmitt inverter for IC202 is to ensure that the micro  
receives ‘clean’ logic levels - the hysteresis voltage (about 0.5V) is  
sufficient to prevent circuit noise from producing a string of  
‘ghost’ signals when analogue levels are near the threshold point.  
Transistors TR311 and TR303 supply the ±15V rails to the op-  
amp, and act as cascades to pass its supply pin currents through to  
the current mirrors, which sit at a potential too high for the op-amp  
to be connected directly.  
TH200 is a positive tempco thermistor placed adjacent to the  
heatsink on which the output transistors are mounted. When the  
temperature of the thermistor exceeds 90 degrees Celsius the  
thermistor goes to a high impedance and so the input to IC202F  
goes low. This triggers a HIGH output to the micro indicating  
thermal overload.  
TR300, TR301 and TR321 form a PNP Wilson current mirror,  
which reflects the current sunk by the positive supply pin of  
IC300. Likewise TR314, TR315 and TR320 form an NPN Wilson  
current mirror, which reflects the current sourced by the negative  
supply pin of IC300.  
The VI protection signals from the left and right channels pass into  
IC202A and IC202B respectively, to be ‘cleaned up’ via the  
Schmitt trigger. They are then NOR’d using TR205 which sends a  
HIGH signal to the micro in the event of either channel suffering a  
short circuit or current overload. Exactly the same approach is  
used for the DC fault lines using IC202C and IC202D.  
R315 thru R318 provide emitter degeneration of approximately  
300mV for the current mirrors (as they pass about 3mA DC in  
quiescent conditions), to ensure accurate operation independent of  
the small variations between the transistors in the current mirrors.  
They also ensure that the current passing down the next stage is  
reasonably constant as the internal temperature of the amplifier  
changes, swamping out small thermal variations in the VBE of the  
mirror transistors.  
L882 Circuit Sheet 3  
This is the main audio power amplifier circuit. The amplifier is a  
R319 and R320 slightly decouple the rails to the current mirrors  
from the main power rails of the amplifier, to allow the bootstrap  
circuit to operate. The bootstrap consists of C302 and C306 with  
metal film power resistors R352 and R353. The bootstrap is  
provided to allow the power supply rails of the current mirrors to  
go up and down slightly with the output signal into the  
loudspeaker. This enables the driver stage to fully saturate the  
output transistors and thus give the greatest power output and best  
thermal efficiency for any given power rail voltage. The voltage on  
the ‘inside’ end of R319 and R320 will vary by about 12 volts  
peak to peak at full output power, rising above the main power  
rails during signal peaks.  
C307 and C308 with R333 and R335 provide the compensation  
necessary to ensure stability when the loop is closed. They are  
Miller capacitors which dramatically reduce the transimpedance  
(i.e. current to voltage gain) of the current mirrors at high  
frequencies. The present value of 47pF provides for a unity gain  
open loop bandwidth of around 75MHz, whilst ensuring a closed  
loop gain margin of around 6dB (note that gain margin in a current  
feedback design is not dependent on system bandwidth to a first  
order approximation). R333 and R335 provide a ‘zero’ in the open  
loop frequency response which is tailored to give the best time  
domain performance (i.e. to make high frequency square waves  
look square with minimal ringing or overshoot).  
class  
B
design, which uses SAP ‘audio’ transistors in  
a
symmetrical current feedback configuration. Input and feedback  
paths are DC coupled and there is an active integrating servo to  
remove DC offsets from the output.  
The basic principle of operation is follows:  
The input signal is amplified by a factor of 2 in IC300A. This  
drives a 44 impedance to ground causing the supply pin currents  
to change with the signal level. These changing supply pin currents  
are then ‘reflected’ by a pair of complementary Wilson mirrors  
and passed on to a series of buffer transistors before being  
connected to the load. The ‘feedback current’ flows back from the  
output terminal via R331 and R332 and attempts to provide the  
current necessary to allow IC300A to swing its output without  
drawing excessive current from its supply pins, thus making the  
change in supply current very small indeed. This is why the term  
‘current feedback’ is used - it is the current flowing in the  
feedback resistors that sets the overall gain of the amplifier.  
IC300B acts as an inverting integrator and its purpose is to remove  
DC from the loudspeaker output. Any positive DC offset will  
cause the output of IC300B to go negative, thus increasing the  
current in its negative supply pin and pulling the output voltage  
back towards zero. R330 and C317 set the time constant of this  
integrator (0.47 seconds) so that audio frequency components are  
ignored and only DC and subsonic frequencies are removed.  
DZ304 and C311 provide a fixed 4.7V bias voltage to allow the  
following stages to operate correctly. C311 is there to ensure that  
both halves of the following stage receive an equal AC signal  
component at high frequency.  
C313 locally couples the ‘high frequency’ and loudspeaker ground  
returns together at the output to overcome the effects of track  
inductance back to the star point. C309 couples the ‘high  
frequency’ and signal grounds together at the input for the same  
reason.  
TR310 and TR307 are the ‘pre-driver’ transistors, which act to  
buffer the outputs from the preceding stage and drive the  
Darlington output power transistors. TR309 and R321 act as a  
current limit, to ensure that the emitter current of TR310 does not  
exceed 30mA in a fault condition. TR306 and R323 provide the  
same function for TR307.  
D303 and D304 are ‘flyback’ diodes to protect the output  
transistors from reverse bias when the amplifier is heavily clipped  
into an inductive load (such as a loudspeaker voice coil!)  
R338 and R339 are to loosely couple the outputs of the pre-driver  
stage to the inputs of the Darlington power output devices. This is  
so that the inbuilt temperature sensing diodes of the output  
transistors can accurately control the quiescent current of the  
output stage as the junction temperature of the power devices  
varies. C312 and C318 ensure that both halves of the output stage  
receive an equal AC signal component.  
Sheet 4 is an identical copy of sheet 3 so I will not describe it  
separately.  
L870 Phono Circuit Description  
The Phono board is a simple single stage RIAA amplifier. It  
consists of two channels of high gain amplification, and switching  
between moving magnet (MM) and moving coil (MC) settings.  
The output transistors are TR318 and TR319. These are Sanken  
SAP15N and SAP15P devices respectively. They are specially  
designed for audio power amplifier use. In addition to high current  
gain (Darlington with a typical hFE of 20,000) they provide an  
inbuilt emitter resistor (thick film power resistor of 0W22) and  
temperature sensing diodes which closely and rapidly track the  
VBE versus temperature characteristic of the power transistors,  
allowing for easy, fast-responding and reasonably accurate control  
of quiescent current (one of the major headaches of class B  
amplifier design!)  
PSU  
The unit derives its ±15V regulated rails from the unit it is fitted  
into with only local decoupling capacitors on board.  
Interface  
The unit connects to the host unit via a 8 way connector:  
Amplifier  
RV300 is for fine trimming of the quiescent current. PL300  
provides a convenient measuring point for this, which is short-  
circuit protected in the event of a slip with the multimeter probe!  
All of the remaining circuitry to the right of TR318 and TR319 is  
essentially for output stage protection...  
The left channel has designators beginning with 100, and the right  
with 200. For the purposes of this description the left channel will  
be described, as the right channel the same in all respects.  
The amplifier is a small signal class A voltage feedback amplifier  
with switchable gain. The input consists of an actively loaded  
differential pair of very low noise PNP transistors (TR106,107).  
These transistors are very specific and should only be replaced  
with identical parts with the E grade high gain. TR100 & TR101  
form a current source for the pair, which sets the quiescent current  
for the entire amplifier. The active load consists of TR110 &  
TR111, which forms part of a differential current mirror with  
TR112,113 & 114. This differential stage also has an active load  
(TR102 & TR103) to keep gain to a maximum.  
Transistors TR312 and TR304, along with the network of resistors  
and capacitors to which they are connected, provide instantaneous  
overload protection of the output stage. This is a conventional  
single slope VI protection scheme, which allows much greater  
current to be delivered into a rated load than into a short circuit.  
The values allow for 18A peak delivery (at clip) into a purely  
resistive load, 7A peak (at clip) into a purely capacitive load and  
around 4A peak into a short circuit. R345, C303, R346 and C304  
allow these values to be doubled for short transient bursts  
(approximately 2.7 milliseconds) so that impulsive musical  
transients can be delivered cleanly with minimal risk of damaging  
the output transistors.  
Both of these differential stages are designed to have as much gain  
as possible to enable the single stage design. The RIAA response  
is  
achieved  
in  
the  
feedback  
network:  
C101,110,111,112,119,120,&R115,112. C115 is used to correct  
between MM & MC gains as the amplifier is non-inverting.  
TR313, TR302 and their associated components send a signal to  
the microprocessor when the instantaneous protection circuits are  
having to work ‘hard’ to prevent amplifier overload. This instructs  
the micro that the user is severely abusing the amplifier and will  
switch off the loudspeaker relays to prevent possible permanent  
damage. In reality, if you short circuit the outputs at any  
appreciable volume level, this circuit will trigger and the  
microprocessor will turn off the loudspeaker relays and send a  
signal to the user.  
SW100 switches between MM & MC. Two poles of the switch  
change between the different loading required for each type of  
cartridge: R108 & C109 for MM, and added in parallel for MC  
R104 & C108. The other two poles change the feedback resistor  
value to alter the gain. MM: R105 and in parallel for MC R123.  
The DC offset is controlled by a non-inverting servo built around  
IC100. The amount of servo current is different for each gain  
setting via R111 (MM) & R124(MC) so that the low frequency  
high pass point remains the same for both settings. However the  
high pass point for the circuit is set by C113. This gives a warp  
filter, stops DC startup thumps from upsetting DC coupled  
circuitry and an approximation of the RIAA/IEC curve (-2dB @  
20Hz).  
R308, R314 and C320 form a low pass filter from which the DC  
detection circuits can sense excessive DC at the loudspeaker  
outputs. If there is any positive DC present, then TR316 will turn  
on, which turns on TR305 and thus activates the DC protection  
line to the micro, turning off the loudspeaker relays.  
The output is class A buffered by a dual mirror follower  
(TR104,105,108,109). The quiescent current is set up by D100  
and R118,119.  
If there is any negative DC present, then TR308 will turn on,  
which turns on TR317 which then turns on TR305 in turn, causing  
the same effect.  
Closed loop stability is achieved with C116,117, giving  
symmetrical slewing capability.  
R350 and C319 are the Zobel network which is provided to ensure  
the amplifier ‘sees’ a constant and resistive load at very high  
frequencies, to aid stability, although the amplifier will be stable  
without the Zobel fitted.  
SK103 connects to the micro controller and display PCB.  
The 14 pin connector is numbered as follows:  
No Name  
Type Description  
1
+5V_D  
O/P  
O/P  
O/P  
I/P  
5 volt digital supply (for micro)  
2
0V_D  
Digital ground  
3
+49V  
Main power supply for VFD (via fusible resistor)  
4
STANDBY  
SPKR1 ON  
SPKR2 ON  
THERMPROT  
VIPROT  
DCPROT  
AC PRESENT  
TRIGGER  
REMOTE  
0V_D  
Mains relay control signal  
Speaker 1 relay control signal  
Speaker 2 relay control signal  
Over temperature protect  
Short circuit protect  
(HIGH = ON)  
(HIGH = ON)  
(HIGH = ON)  
(HIGH = FAULT)  
5
I/P  
6
I/P  
7
O/P  
O/P  
O/P  
O/P  
O/P  
O/P  
O/P  
O/P  
8
(HIGH = FAULT)  
9
DC offset protect  
(HIGH = FAULT)  
(HIGH = ON)  
10  
11  
12  
13  
14  
Indicates AC mains is plugged in  
12V DC trigger input  
(HIGH = ON)  
Demodulated RC5 remote input from rear panel  
Spare digital ground pin  
+5V_D  
Spare 5 volt digital supply pin  
The ground naming convention is as follows:  
Name  
Description  
0V_D  
Digital ground (used for micro processor circuitry, display and interface)  
Right channel loudspeaker ground return  
0V_LS_R  
0V_SIG  
0V_PSU  
0V_TRIG  
0V_HF_R  
0V_LS_L  
0V_HF_L  
Signal ground (this is the ‘clean’ precision reference ground)  
Power supply ground (high current pulses for the large reservoir caps)  
Ground return for the jack socket trigger and remote control circuit  
Decoupling ‘noisy’ ground for the right channel power amp  
Left channel loudspeaker ground return  
Decoupling ‘noisy’ ground for the left channel power amp  
A85, P85, P85/3 Service Guide  
Build History  
ECO  
Date  
Description of Change  
Number  
00_1089  
00_1129  
02/10/00 A85 – Fascia position changed to prevent display buttons sticking  
01/11/00 A85, P85, P85/3 – Improved stability under heavy clipping of amplifier R345,  
R346, R445, R446 changed from 100R to 0R link  
C307, C308, C407, C408 changed from 47P to 100P capacitors  
27/11/00 A85, P85, P85/3 – C303, C304, C403 changed from 10uF to 100uf capacitors –  
this prevents protection circuit from operating when driving a 4 ohm load at  
low frequency  
23/02/01 A85, P85, P85/3 – RV300, RV400 changed to 220R presets to make it easier to  
adjust the bias settings  
00_1138  
01_1030  
01_1068  
01_1101  
11/04/01 A85, P85, P85/3 – New output device clamp fitted to heatsink  
04/06/01 A85, P85, P85/3 – Sensitivity of DC offset detection circuit reduced – Power  
amp cct R308, R408 changed to 22K - R314, R414 changed to 10K  
PSU surface mount fuse F202 up rated from 500mA to 750mA  
22/08/01 A85 – Preamp board upgraded from L866 to L937  
12/10/01 A85, P85, P85/3 – Speaker terminals changed from Camcon to 4mm binding  
post  
01_1142  
01_1178  
01_E014 28/11/01 A85 – Preamp board fuses F300, F301 up rated to 2A surface mount  
02_E033 31/01/02 A85 – Extra pad F038 fitted under TX to stop TX coming loose in transit  
02_E035 04/02/02 A85, P85, P85/3 – Main 20mm fuse rating changed to 4AT  
Software History  
ECO  
Date  
Version  
Description of Change  
Number  
01_1072 18/04/01 1.1  
Remote standby action changed from turning unit completely off  
to putting unit into standby  
01_1095 21/05/01 1.2  
01_1167 12/09/01 1.3  
01_1179 26/10/01 2.0  
01_E011 23/11/01 2.1  
Delay added to start H8 start up routine (volume control chip)  
Volume chip read/write protocol changed  
Added the processor mode option  
Corrected the welcome message saving fault. This fault was  
introduced with version 2.0 software  
02_E048 15/02/02 2.2  
Corrected the processor loop volume jump when v/c adjusted  
Current Fuse Ratings (20/02/02)  
Fuse Position  
Fuse Rating  
Main Supply fuses - A85, P85, P85/3  
PSU fuse F202 - A85, P85, P85/3  
Preamp fuses F300, F301 – A85  
2 x 4AT 20mm (Arcam part number C12406)  
750mA surface mount (Arcam part number C3751)  
2A surface mount (Arcam part number C3202)  
Quiescent Current Setting  
Left channel  
Measure points indicated on PCB -  
Adjust RV300 for 8.5mV cold or 12 mV when warm  
Right channel  
Measure points indicated on PCB -  
Adjust RV400 for 8.5mV cold or 12 mV when warm  
Fault Diagnostics  
Fault  
Action  
No power  
Check fuses  
Check power supply rails  
Unit functions ok but no audio  
Check preamp fuses  
Check RL100A (volume control mute relay)  
Check +5V supply rail  
Check mute signal line  
Volume control locks up  
DC offset  
Check software version is 2.0 or higher  
Check equipment connected to amp for DC on the audio leads  
Check alterations as per ECO 01_1101 have been fitted  
Unit fails to respond to commands Check ribbon cable from display to main board  
Check ribbon cable from display to preamp board  
Unit gets very hot  
Check power stage IQ settings  
Hints & Tips  
ꢀ
ꢀ
To check software version press PHONO, TUNER, DVD buttons on the front panel  
simultaneously.  
On issue 2 phono boards only, fit Kapton insulation tape to the phono stage PCB (rear panel  
end) to prevent track shorting to chassis.  
ꢀ
ꢀ
ꢀ
Check all fuses are the correct rating.  
Check DC offset alterations are fitted as per ECO 01_1101  
To isolate a fault between the pre or power amp section press the PRE/PWR button on the  
rear panel to separate the two sections.  
ꢀ
Check R100 on amp/psu board is not shorting to the track underneath (through plated via).  
1
2
3
4
5
6
7
8
L882C3  
0V_SIG  
L882C3_3.2.SCH  
L SIG  
VIPROT_L  
DCPROT_L  
LS L  
0V_TRIG  
0V_D  
5
8
6
7
0V_HF_R  
0V_LS_R  
0V_LS_L  
0V_PSU  
INPUT  
0V_SIG  
0V_LS  
0V_HF  
VPOS  
VNEG  
VIPROT  
DCPROT  
OUTPUT  
D
C
B
A
0V_SIG  
0V_LS_L  
0V_HF_L  
+49V  
D
C
B
A
TP121  
1
2
L882C2  
L882C2_3.2.SCH  
0V_D  
0V_PSU  
0V_HF_L  
-49V  
+5V_D  
+49V  
-49V  
THERMPROT  
VIPROT  
AC PRESENT  
DCPROT  
REMOTE  
TRIGGER  
0V_D  
+5V(D)  
VPOS  
VNEG  
SP100  
STAR_8  
0V_PSU  
PWRON  
VIPROT_L  
VIPROT_R  
0V_TRIG  
STANDBY  
VIPROT_L  
VIPROT_R  
0V_TRIG  
DCPROT_L  
DCPROT_R  
THPROT_uC  
VIPROT_uC  
AC_PRES  
L882C4  
L882C4_3.2.SCH  
DCPROT_L DCPROT_uC  
DCPROT_R  
R SIG  
VIPROT_R  
DCPROT_R  
LS R  
INPUT  
0V_SIG  
0V_LS  
0V_HF  
VPOS  
VNEG  
VIPROT  
DCPROT  
OUTPUT  
RC5 IN  
TRG IN  
0V_SIG  
0V_LS_R  
0V_HF_R  
+49V  
-49V  
+49V  
SW100A  
2PCO  
LS L  
RLY100C  
RLY G5Z-2A-E  
RLY101C  
RLY G5Z-2A-E  
D100  
1N4003F  
D101  
1N4003F  
TP101  
L SIG  
R SIG  
SK106  
PL100  
1
2
3
4
0V_LS_L  
LS R  
TP102  
SK104B  
1
SK104A  
SK102  
AMPCT4  
TR101  
BD179  
R101  
F
F
1
TR100  
BD179  
SPKR1 ON  
SPKR2 ON  
TP100  
2
3
4
4
SK107  
100R SM  
TP118  
5
R103  
FROM PREAMP  
1
2
3
4
EMC  
L
N
N
330R 1W CF  
R104  
SK105  
0V_SIG  
2
3
1
C100  
LHC  
RHC  
TP119  
R102  
AMPCT4  
1N0 SM  
330R 1W CF  
100R SM  
PHONO4G  
PHONO4G  
TP120  
PL101  
HPSKT  
AMPCT4  
6
7
R105  
R106  
0V_SIG  
100R 1W CF 100R 1W CF  
R107  
220R SM  
R108  
220R SM  
R
0V_SIG  
SW100B  
2PCO  
0V_D  
INTEGRATED / PRE-POWER  
MODE SELECT SWITCH  
SK100A  
SK100B  
Bot+  
RLY100A  
RLY101A  
LS L  
Top+  
TP111  
TP113  
RLY G5Z-2A-E  
TP115  
RLY G5Z-2A-E  
+5V_D  
+49V  
PCB  
0V_LS_L  
PCB  
Top-  
Bot-  
R100  
10R MF  
SK103  
CAMCON_G  
CAMCON_G  
L882PB_3  
EL  
1
2
3
4
5
6
7
8
EARTH LEAD  
8M101  
STANDBY  
SPKR1 ON  
SPKR2 ON  
THERMPROT  
VIPROT  
TP103  
TP104  
TP105  
TP106  
TP107  
TP108  
TP109  
TP110  
TP117  
SK101A  
Top+  
SK101B  
Bot+  
RLY100B  
RLY101B  
EARTH LEAD  
LS R  
TP112  
TP114  
RLY G5Z-2A-E  
TP116  
RLY G5Z-2A-E  
9
DCPROT  
10  
11  
12  
13  
14  
AC PRESENT  
TRIGGER  
REMOTE  
0V_D  
0V_LS_R  
Top-  
Bot-  
CAMCON_G  
CAMCON_G  
FFC 14W 2.54MM VER  
8K7014  
01_1101  
00_1134  
00_1138  
00_1129  
00_1115  
00_1086  
JR  
6/4/01  
POWER SUPPLY FUSES AND DC OFFSET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
3.2  
2.4  
2.3  
2.2  
2.1  
DRAWING TITLE  
MGM  
JR  
17/11/00  
27/11/00  
1/11/00  
16/10/00  
A85 amplifier and PSU - top sheet  
JR  
Circuit Diagram  
2 3 4 2 5  
Notes:  
JR  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
2.0  
JR  
19/9/00  
NO CHANGE TO THIS SHEET  
ECO No. INITIALS  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
J Reckless  
Date Printed  
Filename  
L882C1_3.2.PRJ  
Sheet 1 of 4  
Cambridge CB5 9PB  
L882C1  
DRAWING NO.  
6-Jun-2001  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
NEUTRAL  
SK204  
TP203  
4
3
2
1
8
7
6
5
HS200  
TO220HS08REG  
D
C
B
A
D
C
B
A
TX200  
0V  
1
9VRMS  
IC201  
7805  
+5V_D  
MOLEXPWR8  
RLY200A  
F202  
TP204  
D202  
5
I
O
Vin  
Vout  
+5V(D)  
9V  
TP205  
D200  
1N4003F  
T750mA SM  
1N4003F  
DPDT5V  
NF  
VR200  
VDR 115V  
SK203  
IEC3 NO RIVETS  
LIVE  
SW200B  
VOL SEL SLIDE  
N
E
L
C207  
C225  
100N CD  
C226  
100N CD  
EMC Shield  
F200  
+
TP202  
TP201  
C228  
1000u 10V  
3N3 MAINS  
C224  
100N CD  
+
2
3
115V  
0V  
9V  
6
7
C227  
3300u 25V  
C205  
SH200  
EMCMAINS  
AS2A  
3N3 MAINS  
C206  
3N3 MAINS  
NEUTRAL  
LIVE  
SW200A  
VOL SEL SLIDE  
RLY200B  
D201  
1N4003F  
D203  
1N4003F  
TP200  
NEUTRAL  
TP206  
LIVE  
NF  
DPDT5V  
C208  
VR201  
0V_D  
SK202  
CAGECLAMP1  
VDR 115V  
0V  
BC200  
TOOLING4.1  
F201  
8
TP207  
TP210  
3N3 MAINS  
4
115V  
TX 3VA 9301  
EARTH  
0V_D  
C234  
AS2A  
MAINS WIRING AND AUXILIARY SUPPLY  
220N X2 CLASS  
R231  
1M5 VR25  
+5V_D  
9VRMS  
R219  
1K8 SM  
IC202E  
R220  
TR204  
BC849B  
11  
10  
AC_PRES  
10R SM  
+49V  
74HC14D  
R211  
10K SM  
TP208  
VPOS  
D206  
BAS16W SM  
+
C229  
BR200  
BRGBU8D  
SK205  
22U EL  
+
1
2
3
4
5
6
C209  
10,000u 63V  
C211  
100N PC  
SK200  
3
2
1
6
5
4
3
2
~
~
0V_PSU  
+
C210  
10,000u 63V  
0V_PSU  
0V_D  
MICROPROCESSOR SIGNALS INTERFACE  
AMPCT6  
C212  
100N PC  
+5V_D  
TP209  
MOLEXPWR6  
VNEG  
POWER AMP SUPPLY  
TH200  
PTH90DEG  
C201  
C202  
IC202G  
74HC14D  
IC202F  
100N SM 100N SM  
R221  
-49V  
13  
12  
THPROT_uC  
10R SM  
R205  
1K0 SM  
74HC14D  
CARRIER FILTER AND DEMODULATOR  
+5V_D  
R209  
10K SM  
R223  
10K SM  
0V_D  
TRG IN  
R228  
IC200A  
2
3
1
R226  
SK201A  
+5V_D  
+
IC200C  
LM393A SM  
C233  
10U EL  
470R SM  
100K SM  
TP211  
Near to PCB  
C232  
LM393A SM  
DZ204  
4V7 350MW SM  
100N SM  
R227  
1K0 SM  
L200  
27mH  
R224  
1K8 SM  
IC202A  
C200  
680P PP  
R229  
100K SM  
TR205  
JACK3.5X2  
R201  
R213  
1
3
2
4
BC856B  
VIPROT_L  
VIPROT_R  
C203  
100N SM  
MODULATED RC5  
REMOTE CONTROL INPUT  
1K0 SM  
4K7 SM  
C214  
10N SM  
74HC14D  
IC202B  
VIPROT_uC  
C230  
10N SM  
R230  
1K5 SM  
R202  
R214  
R208  
10K SM  
R206  
1K0 SM  
IC200B  
C218  
10N SM  
1K0 SM  
4K7 SM  
C215  
10N SM  
C219  
10N SM  
5
6
74HC14D  
7
RC5 IN  
R222  
10K SM  
C231  
1N0 SM  
LM393A SM  
R225  
1K8 SM  
0V_D  
0V_D  
+5V_D  
0V_TRIG  
+49V  
IC202C  
TR206  
BC856B  
R203  
R215  
5
6
8
DCPROT_L  
DCPROT_R  
C204  
100N SM  
R218  
10K SM  
1K0 SM  
4K7 SM  
C216  
10N SM  
+5V_D  
74HC14D  
IC202D  
TR200  
BD179  
DCPROT_uC  
RLY200C  
DPDT5V  
R204  
R216  
D205  
+
TR201  
9
R207  
1K0 SM  
C223  
10U EL  
BAS16W SM  
C213  
10N SM  
DZ207  
C220  
100N SM  
FMMT497  
1K0 SM  
4K7 SM  
15V 350MW SM  
C217  
10N SM  
C221  
10N SM  
74HC14D  
TRIGGER OUTPUT  
APPROX 13.5VDC  
60mA MAX CURRENT  
R217  
10R SM  
TP212  
R200  
1K0 SM  
SK201B  
TR202  
FMMT597  
+
STANDBY RELAY CONTROL  
R210  
10K SM  
0V_D  
0V_D  
JR  
C222  
10U EL  
Far from PCB  
01_1101  
00_1134  
6/4/01  
POWER SUPPLY FUSES AND DC OFFSET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
NO CHANGE TO THIS SHEET  
3.2  
JACK3.5X2  
DRAWING TITLE  
2.4  
0V_TRIG  
MGM 17/11/00  
TR203  
FMMT497  
R212  
A85 amplifier - power supply and microcontroller interface  
0V_TRIG  
PWRON  
00_1138 JR  
00_1129 JR  
00_1115 JR  
27/11/00  
1/11/00  
2.3  
CAMCON_G  
SK101C  
4K7 SM  
C235  
2.2  
2.1  
Circuit Diagram  
CHASS  
2 3 4 2 5  
Notes:  
16/10/00  
0V_D  
1N0 SM  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
00_1086 JR  
19-9-00  
R231, C234, C235 ADDED FOR EMC  
2.0  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
J Reckless  
Filename  
Cambridge CB5 9PB  
Sheet 2 of 4  
L882C2  
DRAWING NO.  
6-Jun-2001  
L882C2_3.2.SCH  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
VPOS  
D
C
B
A
D
C
B
A
R319  
100R SM  
R315  
100R SM  
R316  
100R SM  
R300  
10K SM  
PRE DRIVER  
PNP CURRENT MIRROR  
TR310  
FMMT497  
TR300  
FMMT597  
TR301  
FMMT597  
R301  
10K SM  
+
R321  
22R SM  
TR302  
FMMT597  
C300  
100U EL  
DZ300  
15V 350MW SM  
TR309  
FMMT497  
TR321  
FMMT597  
OUTPUT STAGE  
V-I PROTECTION  
VI PROTECT  
R338  
150R SM  
R329  
4K7 SM  
R305  
10K SM  
SIGNAL TO MICRO  
D301  
BAS16W SM  
C307  
TP307  
R333  
0V_HF  
TR318  
SAP15N  
R334  
22K SM  
VIPROT  
3K3 SM  
100P SM  
DZ305  
4V7 350MW SM  
+
TR311  
FMMT497 C317  
R306  
10K SM  
C305  
10U EL  
TP305  
R341  
D303  
1N4003F  
TR312  
FMMT497  
TR313  
FMMT497  
DC SERVO  
R347  
R349  
BOOTSTRAP  
330R SM  
100R SM  
R345  
100R SM 0R0 SM  
100R SM  
+
470N PE  
R325  
1K0 SM  
R343  
C302  
100U EL 100V  
C310  
100N SM  
R330  
IC300B  
ADJ BIAS  
6
7
0V_HF  
1M0 SM  
5
+
PL300  
C303  
0V_SIG  
1
2
RV300  
100R PSET  
R340  
100K SM  
100U EL  
R328  
4K7 SM  
TL072CD  
0V_SIG  
R351  
R352  
470R 2W MF 5%  
10R MF  
D300  
BAS16W SM  
MEASURE  
BIAS  
TP302  
R331  
INPUT FILTER  
R324  
V TO I AMP  
1K5 SM  
0V_SIG  
IC300A  
L300  
(SET TO 16mV)  
3
2
INPUT  
OUTPUT  
TP304  
R332  
1
1K0 SM  
2U2H LAC SMALL  
470R 2W MF 5%  
R353  
DZ302  
DC OFFSET SIGNAL  
TO MICRO  
1K8 SM  
4V7 350MW SM  
TL072CD  
R322  
22R SM  
R327  
22K SM  
R350  
5R6 2W CF  
DCPROT  
R355  
6K8 SM  
R303  
10K SM  
+
+
TR322  
FMMT497  
C318  
C304  
DZ303  
C316  
470P PPW  
C312  
10N SM  
ZOBEL NETWORK  
10U EL  
100U EL  
4V7 350MW SM  
R337  
22R SM  
TR305  
FMMT597  
C311  
100N PC  
C319  
100N PE  
DC OFFSET  
DETECTION  
R326  
1K0 SM  
R344  
R346  
100R SM 0R0 SM  
R304  
10K SM  
0V_SIG  
+
C313  
C306  
TP303  
TR303  
R354  
1K0 SM  
C309  
100N SM  
0V_SIG  
TR304  
FMMT597  
100U EL 100V  
0V_LS  
R348  
100R SM  
D304  
1N4003F  
0V_SIG  
R308  
22K SM  
TP306  
R342  
330R SM  
BOOTSTRAP  
R302  
10K SM  
100N SM  
0V_HF  
FMMT597  
R307  
10K SM  
0V_HF  
0V_LS  
TP308  
C308  
R336  
22K SM  
R335  
3K3 SM  
C314  
100N SM  
D302  
BAS16W SM  
TR319  
SAP15P  
TR316  
FMMT497  
100P SM  
R339  
150R SM  
R310  
4K7 SM  
R313  
DZ306  
4V7 350MW SM  
C320  
100U NP  
0V_SIG  
TR320  
FMMT497  
R314  
10K SM  
DZ301  
15V 350MW SM  
OUTPUT STAGE  
10K SM  
V-I PROTECTION  
+
C315  
100N SM  
0V_HF  
TR306  
FMMT597  
R323  
22R SM  
C301  
100U EL  
0V_HF  
0V_HF  
TR314  
FMMT497  
TR315  
FMMT497  
R309  
10K SM  
TR307  
FMMT597  
TR308  
FMMT597  
NPN CURRENT MIRROR  
PRE DRIVER  
R317  
100R SM  
R318  
100R SM  
R311  
10K SM  
TR317  
FMMT497  
R320  
100R SM  
R312  
10K SM  
VNEG  
01_1101  
00_1134  
JR  
6/4/01  
POWER SUPPLY FUSES AND DC OFFSET  
NO CHANGE TO THIS SHEET  
3.2  
DRAWING TITLE  
2.4  
MGM 17/11/00  
A85 amplifier - power output stage left  
00_1138  
00_1129  
00_1115  
00_1086  
JR  
JR  
JR  
JR  
27/11/00  
1/11/00  
C303 C304 FROM 10U TO 100U  
2.3  
R345 R346 C307 C308 VALUE CHANGES  
R338 R339 CHANGED TO 150R  
2.2  
2.1  
Circuit Diagram  
2 3 4 2 5  
Notes:  
16/10/00  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
19/9/00  
NO CHANGE TO THIS SHEET  
2.0  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
J Reckless  
Filename  
Sheet 3 of 4  
Cambridge CB5 9PB  
L882C3  
DRAWING NO.  
6-Jun-2001  
L882C3_3.2.SCH  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
VPOS  
D
C
B
A
D
C
B
A
R419  
100R SM  
R415  
100R SM  
R416  
100R SM  
R400  
10K SM  
PRE DRIVER  
PNP CURRENT MIRROR  
TR410  
FMMT497  
TR400  
FMMT597  
TR401  
FMMT597  
R401  
10K SM  
+
R421  
22R SM  
TR402  
FMMT597  
C400  
100U EL  
DZ400  
15V 350MW SM  
TR409  
FMMT497  
TR421  
FMMT597  
OUTPUT STAGE  
V-I PROTECTION  
VI PROTECT  
R438  
150R SM  
R429  
4K7 SM  
R405  
10K SM  
SIGNAL TO MICRO  
D401  
BAS16W SM  
C407  
TP407  
R433  
0V_HF  
TR418  
SAP15N  
R434  
22K SM  
VIPROT  
3K3 SM  
100P SM  
DZ405  
4V7 350MW SM  
+
TR411  
FMMT497 C417  
R406  
10K SM  
C405  
10U EL  
TP405  
R441  
D403  
1N4003F  
TR412  
FMMT497  
TR413  
FMMT497  
DC SERVO  
R447  
R449  
BOOTSTRAP  
330R SM  
100R SM  
R445  
100R SM 0R0 SM  
100R SM  
+
470N PE  
R425  
1K0 SM  
R443  
C402  
100U EL 100V  
C410  
100N SM  
R430  
IC400B  
ADJ BIAS  
6
7
0V_HF  
1M0 SM  
5
+
PL400  
C403  
0V_SIG  
1
2
RV400  
100R PSET  
R440  
100K SM  
100U EL  
R428  
4K7 SM  
TL072CD  
0V_SIG  
R451  
R452  
470R 2W MF 5%  
10R MF  
D400  
BAS16W SM  
MEASURE  
BIAS  
TP402  
R431  
INPUT FILTER  
R424  
V TO I AMP  
1K5 SM  
0V_SIG  
IC400A  
L400  
(SET TO 16 mV)  
3
2
INPUT  
OUTPUT  
TP404  
R432  
1
1K0 SM  
2U2H LAC SMALL  
DC OFFSET SIGNAL  
TO MICRO  
470R 2W MF 5%  
R453  
1K8 SM  
TL072CD  
R422  
22R SM  
DZ402  
R427  
22K SM  
R450  
5R6 2W CF  
4V7 350MW SM  
DCPROT  
R455  
6K8 SM  
R403  
10K SM  
ZOBEL NETWORK  
+
+
TR422  
FMMT497  
C418  
C404  
DZ403  
C412  
10N SM  
10U EL  
100U EL  
4V7 350MW SM  
C416  
470P PPW  
R437  
22R SM  
TR405  
FMMT597  
C411  
100N PC  
C419  
100N PE  
DC OFFSET  
DETECTION  
R426  
1K0 SM  
R444  
R446  
100R SM 0R0 SM  
R404  
10K SM  
0V_SIG  
C413  
TP403  
TR403  
R454  
1K0 SM  
C409  
100N SM  
0V_SIG  
+
TR404  
FMMT597  
C406  
0V_LS  
R448  
100R SM  
D404  
1N4003F  
0V_SIG  
R408  
22K SM  
100U EL 100V  
TP406  
R442  
330R SM  
R402  
10K SM  
100N SM  
BOOTSTRAP  
0V_HF  
FMMT597  
R407  
10K SM  
0V_HF  
0V_LS  
C408  
R436  
22K SM  
TP408  
R435  
3K3 SM  
C414  
100N SM  
D402  
BAS16W SM  
TR419  
SAP15P  
TR416  
FMMT497  
100P SM  
R439  
150R SM  
R410  
4K7 SM  
R413  
DZ406  
4V7 350MW SM  
C420  
100U NP  
0V_SIG  
TR420  
FMMT497  
R414  
10K SM  
DZ401  
15V 350MW SM  
OUTPUT STAGE  
10K SM  
V-I PROTECTION  
+
C415  
100N SM  
0V_HF  
TR406  
FMMT597  
R423  
22R SM  
C401  
100U EL  
0V_HF  
0V_HF  
TR414  
FMMT497  
TR415  
FMMT497  
R409  
10K SM  
TR407  
FMMT597  
TR408  
FMMT597  
NPN CURRENT MIRROR  
PRE DRIVER  
R417  
100R SM  
R418  
100R SM  
R411  
10K SM  
TR417  
FMMT497  
R420  
100R SM  
R412  
10K SM  
VNEG  
01_1101  
00_1134  
JR  
6/4/01  
POWER SUPPLY FUSES AND DC OFFSET  
L300 L400 CHANGED TO 7D002C  
C403 C404 FROM 10U TO 100U  
3.2  
DRAWING TITLE  
2.4  
MGM 17/11/00  
A85 amplifier - power output stage right  
00_1138  
00_1129  
00_1115  
00_1086  
JR  
JR  
JR  
JR  
27/11/00  
1/11/00  
2.3  
R435 R436 C407 C408 VALUE CHANGES  
R438 R439 CHANGED TO 150R  
2.2  
2.1  
Circuit Diagram  
2 3 4 2 5  
Notes:  
16/10/00  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
19/9/00  
NO CHANGE TO THIS SHEET  
2.0  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
J Reckless  
Filename  
L882C4_3.2.SCH  
Sheet 4 of 4  
Cambridge CB5 9PB  
L882C4  
DRAWING NO.  
6-Jun-2001  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
DISP1  
DISP SSV-07MS09  
Q_26  
R1  
10K SM  
K4  
Q_27  
R2  
10K SM  
D
C
B
A
K3  
(was POWER)  
D
C
B
A
SW1  
SKIP>  
SW2  
<SKIP  
SW3  
PAUSE  
SW4  
PLAY  
SW5  
STOP  
SW6  
OPEN  
SW7  
FWD>>  
F1  
F2  
BAS16W SM  
D1  
Q_1  
BAS16W SM  
D2  
SW8  
<<RWD  
Q_2  
BAS16W SM  
D3  
Q_28  
Q_3  
R3  
10K SM  
K2  
BAS16W SM  
D4  
Q_4  
(was MENU)  
+5V  
+5V  
VKK switching CCT  
C3  
100N SM  
VKK_D  
VKK_CK  
PCB  
Q_18  
Q_29  
R5  
HDCDLED  
STBLED  
Z2A  
Q5  
BC856B  
R14  
5
2
3
G1  
G2  
G3  
G4  
470R SM  
D
Q
PCB  
4K7 SM  
CLK  
LED2  
C4  
L886PB_3  
SP1  
LED GREEN3.1MM  
6
+5V  
Q
HDCD  
Z1  
1N0 SM  
74HC74 SM  
R15  
R13  
1M0 SM  
1
2
3
4
5
6
7
8
9
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
G5  
G6  
G7  
IR RX  
SW1  
SW2  
SW3  
SW4  
SO  
G5  
G6  
1K0 SM  
SUPPORT PAD  
S16/G7  
S15/G8  
S14/G9  
S13/G10  
VEE  
SEG15  
SEG14  
SEG13  
VKKIN  
VKK  
SO  
SI  
IR RX SUPPORT PAD  
DD1  
C7  
100N SM  
Q6  
BC846B  
SI  
VKK  
VSS  
SCK  
CS  
K1  
K2  
PCB MATERIAL  
FR4, 1 OZ Cu  
SCK  
CS  
SEG12  
SEG11  
SEG10  
SEG9  
S12/G11  
S11  
10  
11  
FR4_1OZ  
S10  
S9  
PS  
Photo Strip  
PHOTO_STRIP  
BU2872AK  
EL1  
SEG8  
SEG7  
SEG6  
SEG5  
SEG4  
SEG3  
SEG2  
SEG1  
Update Box  
+5V  
+5V  
UPDATE_BOX  
SBX1610-52/PIC-26043TM2  
RX1  
R12  
C2  
DD2  
10K SM  
R11  
10K SM  
100N SM  
Drilling  
Detail  
2
+5V  
IRIRQ  
O/P  
O/P  
R9  
10K SM  
C1  
100N SM  
DRILL_DWG  
DD3  
Q4  
BC847B  
Z2B  
9
Q2  
BC847B  
LED1  
12  
11  
R16  
+5V  
D
Q
Q
A2 Horizontal  
Paper Marker  
DUAL FOOTPRINT  
1K0 SM  
R
Q3  
BC847B  
On=Green  
Standby=red  
74HC74 SM  
CLK  
Q_24  
Z2C  
C8  
100N SM  
8
DD_A3H  
Q1  
BC856B  
R6  
R4  
R10  
10K SM  
74HC74 SM  
DD4  
Q_25  
1K0 SM  
220R SM  
A2 Vertical  
Paper Marker  
G
DD6  
+5V  
LC1  
VFD CLIP  
E882PM  
LC2  
DD_A3V  
LED RED/GRN 3MM  
VFD CLIP  
E882PM  
E874PM  
Test pad change for issue 3:  
Q_23= SO (was STBLED)  
Q_9=SI (was GND)  
FIX1  
FIX2  
FIX3  
FIX4  
Layout by  
Cliff  
D5  
FD_1  
FD_2  
VKK  
R8  
4K7 SM  
FIXING HOLEFIXING HOLEFIXING HOLEFIXING HOLE E874PM  
DVD DISPLAY CLIPDVD DISPLAY CLIP  
Display clips: PCB footprint is called E882PM  
This footprint will accept either E874PM (current clip)  
or E882PM (new clip not designed yet)  
BZX284-C5V6  
CLOGO  
FIDUCIAL  
FIDUCIAL  
C5  
+
DATA I/O  
R7  
10U EL SM  
SK1  
+
Pwr in  
SK2  
Q_7  
Q_6  
Q_5  
Q_30  
Q_8  
Q_23  
Q_9  
C6  
33K SM  
1
2
3
4
5
6
7
8
SO  
IRIRQ  
CS  
SCK  
SI  
This part type currently calls for p/n E874PM, change to E882PM when new clip is available  
Q_10  
Q_11  
Q_12  
Q_13  
10U EL SM  
DRAWING TITLE  
VKKIN  
1
2
3
4
5
6
F2  
DVD DISPLAY PCB  
F1  
PG  
PG  
CL  
CL  
17/11/00  
14/09/00  
23/08/00  
Correct error R4 is 1206 not 0805  
3.0a  
3.0  
CATHODE BIAS CCT  
+5V  
00_1082  
Change RX1 to l/p part, test pad changes, display clip, R4 VALUE  
MINOR MODIFICATIONS  
Circuit Diagram  
Q_14  
Notes:  
2.0  
AMPCT6H  
A & R Cambridge Ltd.  
Pembroke Avenue  
FFC8H SM  
VKK = -19.5V  
F1= -13.9V  
F2 = -9.6V  
31/07/00  
PRODUCTION RELEASE  
1.0  
Denny Industrial Centre  
Waterbeach  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
Drawn by:  
ISSUE  
Filename  
Cambridge CB5 9PB  
Sheet 1 of 1  
DRAWING NO. L886_3  
17-Nov-2000  
PG  
J:\ECO_wip\L886 DV88 Display board correct R4 cock-up\L8863\L8863.0a.ddb - L886_3.0a.sch  
1
2
3
4
5
6
7
8
1
2
3
4
D
C
B
A
D
C
B
A
Main signal path  
L937C2_1.1.SCH  
Power supply  
L937C3_1.1.SCH  
USE EXCLUDE NF WHEN USING RUNOUT SHEET PROGRAM  
DRAWING TITLE  
Integrated amplifier preamp  
PCB1  
PCB  
Circuit Diagram  
2 3 4 2 5  
Notes:  
01_E014  
01_1142  
JBR  
JBR  
28/11/01  
Fuses uprated to 2A  
1.1  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
L937PB_1  
14/8/01  
First production release  
1.0  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
JBR  
Filename  
Cambridge CB5 9PB  
Sheet 1 of 3  
L937C1  
DRAWING NO.  
28-Nov-2001  
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C1_1.0.PRJ  
1
2
3
4
1
2
3
4
5
6
7
8
D100  
BAV99W DUAL SM  
D105  
BAV99W DUAL SM  
+15V  
-15V  
+5V  
+15V  
+15V  
1
-15V  
D103  
BAV99W DUAL SM  
Z100  
Z109A  
TL072 SM  
AUX L  
CD L  
TUNER L  
AV L  
4
5
6
13  
8
R110  
2K2 SM  
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
SK2A  
+15V  
CDL1  
R100  
CDL  
SK4B  
Z111A  
TL072 SM  
CD INPUT  
1
CD L  
3
2
0V_SIG  
Z112_3  
R108  
TAPEO1  
Z112A  
7
TAPE OUTPUT  
1K0 SM  
Z111_3  
R112  
22K SM  
C104  
100N SM  
Z112B  
F
DVD L  
12  
11  
10  
9
R106  
1M0 SM  
3
2
Z111_1  
TL072 SM  
47R SM  
C108  
100P SM  
R114  
C101  
470P FKP2  
F
R103  
100K SM  
1
3
2
TL072 SM  
Z112_1  
C117  
VCR IN L  
MODULE L  
1
5
6
+5V  
22K SM  
Z112_7  
Z106_14  
C105  
100N SM  
N
+
0V_SIG  
R111  
2K2 SM  
R113  
22K SM  
7
C110  
100U EL  
CDR1  
C100  
1N0 SM  
N
+
0V_SIG  
TAP0  
TAP1  
TAP2  
+5V  
Z108D  
17  
Z108A  
14  
C120  
10U EL  
C118  
100N SM  
0V_SIG  
CDR  
2
1
16  
15  
0V_SIG  
0V_SIG  
TAPE02  
C115  
10U CERAFINE  
EN  
A0  
A1  
A2  
-15V  
TAPE 0  
TAPE 1  
TAPE 2  
Z108E  
PHONO4G  
+15V  
R119  
R101  
+
0V_SIG  
CD R  
PHONO4G  
C111  
22K SM  
D
C
B
A
D
C
B
A
22P SM  
R118  
1K0 SM  
Z108_19  
10U CERAFINE  
0V_SIG  
SCLK 13  
SDATA 12  
1
8
11  
SCLK  
SDATA  
TONEID  
CLK  
DIN  
RST DOUT  
PS  
R/W  
C102  
470P FKP2  
-15V R104  
100K SM  
14  
3
22K SM  
GND  
V-  
R120  
22K SM  
R121  
22K SM  
TONEID  
9
C113  
C114  
CFKP2 63V 2N2  
D101  
BAV99W DUAL SM  
470N PE  
0V_SIG  
DG408DY  
5
6
R204  
10K SM  
+15V  
Z111_7  
IC DS1844  
-15V  
+15V  
+15V  
7
-15V  
7
D104  
BAV99W DUAL SM  
+
0V_SIG  
-15V  
Z101  
R115  
2K7 SM  
R117  
5K6 SM  
C116  
Z109B  
TL072 SM  
Z111B  
TL072 SM  
AUX R  
CD R  
TUNER R  
AV R  
4
5
6
13  
8
10U CERAFINE  
C106  
100N SM  
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
R122  
D102  
BAV99W DUAL SM  
+15V  
SK2B  
5
6
R109  
Z115_1B  
2R2 SM  
0V_TONEID  
C119  
10N SM  
7
C112  
C107  
100N SM  
DVD R  
12  
11  
10  
9
R107  
1M0 SM  
0V_SIG  
47R SM  
C109  
100P SM  
R124  
0V_SIG  
-15V  
VCR IN R  
470N PE  
C192  
TUNL1  
TUNL  
TUNER L  
R102  
MODULE R  
R116  
2K7 SM  
TUNER INPUT  
2R2 SM  
+5V  
1K0 SM  
F
0V_SIG  
2
1
16  
15  
0V_SIG  
+5V  
0V_SDATA  
EN  
A0  
A1  
A2  
C103  
470P FKP2  
R105  
100K SM  
TAPE 0  
TAPE 1  
TAPE 2  
470N PE  
+5V  
0V_SIG  
TAPE0  
R123  
TAPE1  
TAPE2  
N
0V_SIG  
R135  
2K2 SM  
0V_SIG  
D111  
2R2 SM  
TUNR1  
BAV99W DUAL SM  
Z113A  
TL072 SM  
0V_SIG  
TUNR  
14  
3
0V_SCLK  
GND  
V-  
Z114A  
TL072 SM  
PHONO4G  
+15V  
Z113_3  
R138  
R125  
R137  
22K SM  
Z114B  
TL072 SM  
TUNER R  
3
2
0V_SIG  
Z114_3  
SK100  
R151  
Z113_1  
R139  
22K SM  
0V_SIG  
DG408DY  
Z102  
1
3
2
Z114_1  
LISTEN 0  
1
2
3
4
5
6
7
8
9
R147  
1K0 SM  
22K SM  
C138  
-15V  
+15V  
+15V  
1
-15V  
1
5
LISTEN 1  
LISTEN 2  
VCR 0  
VCR 1  
VCR 2  
TAPE 0  
TAPE 1  
TAPE 2  
D109  
BAV99W DUAL SM  
R152  
22K SM  
Z114_7  
R144  
Z106_11  
22K SM  
C122  
+
-15V R128  
100K SM  
R136  
2K2 SM  
7
R148  
Z110A  
TL072 SM  
C131  
100U EL  
22K SM  
470P FKP2  
AUX L  
CD L  
4
5
6
13  
8
22K SM  
Z108B  
7
Z108C  
4
6
R153  
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
22K SM  
VCR OUTPUT  
SK5B  
VCRO1  
C136  
10U CERAFINE  
R149  
+15V  
22K SM  
D106  
BAV99W DUAL SM  
TUNER L  
AV L  
3
2
R154  
R133  
22K SM  
+
7
22K SM  
R150  
C132  
10U CERAFINE  
22K SM  
0V_SIG  
-15V  
DVD L  
12  
11  
10  
9
R131  
1M0 SM  
22P SM  
R143  
R155  
C125  
100N SM  
47R SM  
C129  
100P SM  
Z108_3  
22K SM  
F
TAPE IN L  
0V_SIG  
10  
D107  
BAV99W DUAL SM  
22K SM  
+15V  
MODULE L  
R145  
22K SM  
R146  
22K SM  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
C126  
100N SM  
0V_SIG  
C134  
470N PE  
C135  
N
+5V  
Z116_1B  
CFKP2 63V 2N2  
2
1
16  
15  
0V_SIG  
0V_SIG  
VCR02  
5
6
MUTE*  
EN  
A0  
A1  
A2  
Z113_7  
0V_SIG  
VCR 0  
VCR 1  
VCR 2  
7
TONE*  
-15V  
VCR01  
VCR11  
VCR21  
+
SK3A  
1
R140  
2K7 SM  
R142  
5K6 SM  
0V_D  
C137  
10U CERAFINE  
PHONO4G  
AVL1  
AVL  
AV L  
R126  
Z113B  
TL072 SM  
AV INPUT  
TONEID  
1K0 SM  
F
14  
3
0V_TONEID  
0V_SDATA  
0V_SLOAD  
0V_SCLK  
SDATA  
GND  
V-  
C123  
R129  
100K SM  
C133  
470P FKP2  
0V_SIG  
SLOAD  
N
0V_SIG  
0V_SIG  
DG408DY  
AVR1  
C121  
1N0 SM  
-15V  
+15V  
+15V  
7
-15V  
470N PE  
C193  
SCLK  
D110  
BAV99W DUAL SM  
0V_SIG  
AVR  
Z103  
R141  
2K7 SM  
Z110B  
TL072 SM  
AUX R  
CD R  
TUNER R  
AV R  
DVD R  
TAPE IN R  
4
5
6
13  
8
FFC22V1MM  
PHONO4G  
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
R127  
0V_SIG  
AV R  
5
6
470N PE  
1K0 SM  
R134  
7
SK101  
1
2
3
4
5
6
7
8
C124  
+15V  
-15V R130  
100K SM  
12  
11  
10  
9
R132  
1M0 SM  
0V_SIG  
AUX L  
47R SM  
C130  
100P SM  
470P FKP2  
AUX R  
+15V  
D108  
BAV99W DUAL SM  
MODULE R  
+5V  
CD L  
0V_SIG  
-15V  
2
1
16  
15  
0V_SIG  
C127  
100N SM  
EN  
A0  
A1  
A2  
0V_SIG  
VCR 0  
VCR 1  
VCR 2  
CD R  
VCR0  
VCR1  
D112  
BAV99W DUAL SM  
+15V  
TUNER L  
TUNER R  
AV L  
9
C128  
100N SM  
0V_SIG  
VCR2  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
14  
3
C148  
GND  
V-  
-15V  
SK3B  
DVDL1  
DVDL  
DVD L  
R156  
0V_SIG  
DG408DY  
22P SM  
R178  
DVD INPUT  
-15V  
+15V  
AV R  
1K0 SM  
F
Z104  
+15V  
R170  
22K SM  
C140  
R159  
100K SM  
AUX L  
CD L  
TUNER L  
AV L  
DVD L  
TAPE IN L  
VCR IN L  
MODULE L  
4
5
6
13  
8
DVD L  
R162  
22K SM  
2
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
22K SM  
470P FKP2  
+
R171  
C190  
10U EL  
22K SM  
N
0V_SIG  
DVD R  
D122  
BAV99W DUAL SM  
R163  
DVDR1  
Z115_1A  
C150  
22K SM  
7
1
+5V  
+15V  
-15V  
R172  
Z115A  
3
R185  
22K SM  
+
0V_SIG  
DVDR  
12  
11  
10  
9
TAPE IN L  
TAPE IN R  
VCR IN L  
VCR IN R  
R164  
C191  
10U EL  
22K SM  
+
+
0V_SIG  
D121  
BAV99W DUAL SM  
R173  
C157  
22R SM  
PHONO4G  
+15V  
R157  
C154  
10U EL  
22K SM  
C155  
100N SM  
DVD R  
OPA2134PA SM  
R165  
100U EL  
C156  
100N SM  
22K SM  
1K0 SM  
+15V  
Z107_1  
+5V  
470N PE  
Z115B  
-15V  
R183  
C141  
-15V R160  
100K SM  
2
1
16  
15  
6
5
0V_SIG  
3
LFO  
EN  
A0  
A1  
A2  
R180  
470P FKP2  
LISTEN 0  
LISTEN 1  
LISTEN 2  
7
Z106  
0V_SIG  
1M0 SM  
C143  
100N SM  
LIST0  
LIST1  
LIST2  
/TONE  
+15V  
TONE*  
1
2
3
4
5
6
7
8
16 TONE*  
C158  
22P SM  
100K SM  
SEL1 SEL2  
D113  
BAV99W DUAL SM  
C147  
100N PE  
MODULE L  
MODULE R  
15  
14  
2
3
SK102  
OPA2134PA SM  
+15V  
C144  
100N SM  
0V_SIG  
D1  
S1  
D2  
S2  
V+  
VL  
S3  
D3  
SK102_1  
R186  
0V_SIG  
-15V  
14  
3
C149  
1
1
2
3
4
Z117A  
GND  
V-  
R188  
0V_SIG  
0V_SIG  
FFC30V SM  
47R SM  
Z107_4  
+
-15V  
4
2
D114  
BAV99W DUAL SM  
C188  
-15V  
LIN  
LMO  
RFO  
10K SM  
+15V  
SK4A  
0V_SIG  
R174  
DG408DY  
22P SM  
R179  
13  
14  
0V_SIG  
0V_MODULE  
OPA2134PA SM  
10U EL  
V-  
-15V  
+15V  
+5V  
12  
5
0V_SIG  
SK102_3  
LGND  
C152  
100N SM  
C153  
100N SM  
+
Z105  
AMPCT4  
TO POWER AMP I/P  
C189  
GND  
S4  
22K SM  
AUX R  
CD R  
TUNER R  
AV R  
DVD R  
TAPE IN R  
VCR IN R  
MODULE R  
4
5
6
13  
8
0V_SIG  
C159  
22P SM  
R166  
10U EL  
Z116_1A  
C151  
22K SM  
X0  
X1  
X2  
X3  
X4  
X5  
X6  
X7  
V+  
D
22K SM  
11  
10  
9
0V_SIG  
R182  
R175  
TAPEIL1  
TAPEIL  
Z107_13  
R158  
22K SM  
TAPE INPUT  
1
TAPE IN L  
2
3
0V_SIG  
13  
12  
15  
6
5
R167  
RIN  
RMO  
R187  
22K SM  
+15V  
7
1
-15V  
7
RLY100A  
RLY100B  
R176  
1K0 SM  
Z116A  
Z117B  
D4  
22K SM  
F
12  
11  
10  
9
0V_SIG  
TONE*  
R168  
47R SM  
RGND  
22K SM  
C142  
470P FKP2  
R161  
100K SM  
TONE*  
R177  
SEL4 SEL3  
DG413DY  
RLY DPDT 5V SM RLY DPDT 5V SM  
22K SM  
C145  
100N SM  
OPA2134PA SM  
OPA2134PA SM  
R169  
22K SM  
N
0V_SIG  
0V_SIG  
100R SM  
0V_SIG  
0V_SIG  
TAPEIR1  
C139  
1N0 SM  
+5V  
470N PE  
Z116B  
Z107  
VSDVC  
R184  
C146  
100N SM  
0V_SIG  
TAPEIR  
0V_SIG  
2
1
16  
15  
6
5
+5V  
EN  
A0  
A1  
A2  
R199  
LISTEN 0  
LISTEN 1  
LISTEN 2  
7
1M0 SM  
PHONO4G  
+15V  
LISTEN0  
LISTEN1  
LISTEN2  
R189  
0V_SIG  
TAPE IN R  
100K SM  
R200  
C167  
100N PE  
-15V  
1K0 SM  
D120  
BAS16W SM  
R181  
10K SM  
+
-
RLY100C  
RLY DPDT 5V SM  
OPA2134PA SM  
2R2 SM  
R201  
C161  
+
-15V R192  
100K SM  
14  
3
0V_SDATA  
C187  
10U EL  
GND  
V-  
470P FKP2  
0V_SIG  
0V_SIG  
2R2 SM  
R202  
D115  
BAV99W DUAL SM  
0V_SIG  
DG408DY  
+15V  
0V_SLOAD  
0V_SCLK  
+15V2  
-15V  
+15V  
+5V  
0V_SIG  
-15V  
SK103  
C186  
2R2 SM  
+15V1  
C168  
100N SM  
C172  
100N SM  
C176  
100N SM  
C180  
100N SM  
1
2
3
4
5
6
7
8
Q100  
BC849B  
D116  
BAV99W DUAL SM  
D118  
BAV99W DUAL SM  
AUXR1  
R203  
4K7 SM  
+15V  
+15V  
-15V  
AUX R  
AUX L  
100N SM  
MUTE*  
0V_SIG  
Z109C  
TL072 SM  
Z110C  
TL072 SM  
Z111C  
TL072 SM  
Z112C  
AUXL1  
-15V1  
TL072 SM  
SK5A VCRIL1  
SK6  
F
0V_SIG  
C169  
100N SM  
0V_SIG  
0V_SIG  
0V_SIG  
VCRIL  
AUXIL1  
AUXL  
R190  
R195  
VCR INPUT  
1
VCR IN L  
1
AUX L  
AUX INPUT  
C173  
100N SM  
C177  
100N SM  
C181  
100N SM  
1K0 SM  
1K0 SM  
-15V2  
C162  
F
AMPCT8  
-15V  
0V_D  
470P FKP2  
R193  
100K SM  
R197  
100K SM  
+15V  
C165  
470P FKP2  
0V_SIG  
-15V  
N
N
0V_SIG  
0V_SIG  
VCRIR1  
AUXIR1  
C160  
1N0 SM  
C164  
1N0 SM  
C170  
100N SM  
C174  
100N SM  
C178  
100N SM  
C182  
100N SM  
C184  
DRAWING TITLE  
Integrated amplifier preamp - main signal path  
100N SM  
0V_SIG  
VCRIR  
0V_SIG  
AUXR  
AUX R  
0V_HF  
PHONO4G  
+15V  
PHONO2G  
+15V  
R191  
R196  
0V_SIG  
VCR IN R  
0V_SIG  
Z113C  
TL072 SM  
Z114C  
TL072 SM  
Z115C  
Z116C  
Z117C  
1K0 SM  
1K0 SM  
Circuit Diagram  
2
3 4 2  
5
C163  
C166  
470P FKP2  
-15V R194  
100K SM  
-15V R198  
100K SM  
0V_SIG  
0V_SIG  
0V_SIG  
0V_SIG  
0V_SIG  
Notes:  
470P FKP2  
01_E014  
01_1142  
ECO No. INITIALS  
Date Printed 28-Nov-2001  
JBR  
28/11/01  
14/8/01  
DATE  
Fuses uprated to 2A  
First production release  
DESCRIPTION OF CHANGE  
1.1  
1.0  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
C171  
100N SM  
C175  
100N SM  
C179  
100N SM  
C183  
100N SM  
C185  
JBR  
D117  
BAV99W DUAL SM  
D119  
BAV99W DUAL SM  
100N SM  
ISSUE  
0V_SIG  
0V_SIG  
-15V  
Drawn by:  
Filename  
Cambridge CB5 9PB  
Sheet 2 of 3  
DRAWING NO. L937C2  
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C2_1.0.SJCBH R  
1
2
3
4
5
6
7
8
1
2
3
4
D302  
D304  
BAS16W SM  
Q305  
BAS16W SM  
LM317T  
Z301  
+15V  
+15V3  
+5V  
+5V  
2SA1964  
I
O
Vin  
Vout  
D
C
B
A
D
C
B
A
Q306  
SK300  
MOLEXPWR4  
BC846B  
D305  
BAS16W SM  
UR+  
R303  
470R SM  
D300  
S1D  
D301  
S1D  
Q300  
J112  
+
C300  
1000u 35V  
+3.75V  
C304  
100N SM  
F300  
AC1  
+
+
R300  
330R SM  
R302  
1K2 SM  
C306  
470U EL 25V  
+
D310+  
C303  
3300u 25V  
C305  
10U EL  
T2A SM  
C307  
470N PE  
C308  
100N SM  
D310  
15V 350MW SM  
R307  
220R SM  
C314  
1N0 PP  
+
+
C302  
220U EL  
+15V SK301  
C312  
C309  
100N SM  
1
2
3
4
C315  
1N0 PP  
220U EL  
D311  
15V 350MW SM  
F301  
AC2  
0V_PSU  
+
-15V  
0V_PSU  
C313  
3300u 25V  
T2A SM  
IDC4S  
Q303  
J112  
D311-  
0V_MODULE  
D306  
S1D  
D307  
S1D  
+
C310  
1000u 35V  
R304  
330R SM  
SP300  
0V_PSU  
0V_SIG  
STAR POINT 4  
Q307  
BC856B  
UR-  
-15V3  
0V_HF  
0V_MODULE  
-15V  
Q301  
2SC5248  
D308  
0V_SIG  
BAS16W SM  
DRAWING TITLE  
Integrated amplifier preamp - power supply  
Circuit Diagram  
2 3 4 2 5  
Notes:  
01_E014  
01_1142  
JBR  
JBR  
28/11/01  
Fuses uprated to 2A  
1.1  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
14/8/01  
First production release  
DESCRIPTION OF CHANGE  
1.0  
ECO No. INITIALS  
DATE  
ISSUE  
Drawn by:  
Date Printed  
Filename  
Cambridge CB5 9PB  
Sheet 3 of 3  
L937C3  
DRAWING NO.  
JBR  
28-Nov-2001  
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C3_1.0.SCH  
1
2
3
4
1
2
3
4
5
6
7
8
A85 DISPLAY PCB  
D
C
B
A
D
C
B
A
L865C2_2.0  
L865C2_2.0.SCH  
UDB  
Update Box  
(Small)  
UPDATE_SML  
MICRO  
FD_1  
FIDUCIAL FIDUCIAL  
FIX7 FIX2  
FD_2  
FIX10  
FIX4  
FIX5  
FIX6  
FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE  
C39  
1N0 SM  
CHASSIS 1  
(BY SK3)  
C40  
1N0 SM  
C41  
1N0 SM  
C42  
1N0 SM  
C43  
C44  
0V_D  
1N0 SM  
1N0 SM  
0V_D  
0V_D  
0V_D  
0V_D  
0V_D  
FIX1  
FIX8  
FIX9  
FIX3  
FIX11  
FIXING HOLE  
FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE  
C45  
1N0 SM  
C46  
1N0 SM  
C47  
1N0 SM  
CHASSIS 2  
(BY SK1)  
C48  
1N0 SM  
C49  
1N0 SM  
0V_D  
0V_D  
0V_D  
CHASSIS 3  
(BY SK2)  
0V_D  
0V_D  
PCB1  
PCB  
L865PB_2  
DRAWING TITLE  
MARY AMP DISPLAY PCB  
Circuit Diagram  
2 3 4 2 5  
Notes:  
EDD  
19/07/2001 IR DUAL FOOTPRINT ADDED  
2.0  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
ISSUE 1.1  
00_1103  
JBR 29 SEP 2000 SW1 TO SW10 CHANGED  
1.1  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
Sheet 1 of 2  
ISSUE  
Drawn by:  
Filename  
Cambridge CB5 9PB  
L865C1  
DRAWING NO.  
JBR  
8-Jan-2002  
J:\Completed_Projects\A85 (Mary)\mary display\L865_2\l865_2.0 dbase.ddb - Documents\L865_2.0.PRJ  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
+5V  
Q2  
Q1  
R1  
10K SM  
SW6  
R2  
10K SM  
R3  
R4  
10K SM  
SW8  
R5  
10K SM  
SW7  
R6  
R7  
R8  
R68  
10K SM  
A1506  
SW17  
R9  
R10  
10K SM  
SW1  
R11  
10K SM  
SW4  
R12  
10K SM  
SW2  
R13  
10K SM  
SW5  
R14  
10K SM  
SW3  
R15  
R16  
10K SM  
SW9  
BC847B  
BC847B  
R17  
1K5 SM  
R18  
1K5 SM  
R19  
1K5 SM  
R20  
1K5 SM  
R21  
1K5 SM  
R22  
1K5 SM  
R25  
1K5 SM  
R24  
1K5 SM  
R23  
1K5 SM  
R31  
1K5 SM  
10K SM  
TACTSW SM  
SW11  
10K SM  
TACTSW SM  
SW13  
10K SM  
TACTSW SM  
SW14  
10K SM  
TACTSW SM  
SW15  
10K SM  
TACTSW SM  
SW16  
10K SM  
SW10  
A1509  
A1509  
SW12  
A1509  
A1509  
A1509  
A1509  
A1509  
A1509  
A1509  
A1509  
LED7  
LED8  
LED6  
LED3  
LED10  
LED9  
LED1  
LED4  
LED2  
LED5  
R29  
10K SM  
R30  
10K SM  
R33  
330R SM  
R34  
150R SM  
D
C
B
A
D
C
B
A
0V_D  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED GREEN3.1MM  
LED11  
Z7B  
+5V  
2V7  
0V5  
5
F1 to F2 = 4Vac 150mA  
VDD2 = 40Vdc 20mA  
7
+5V  
SP1  
DOUBLE SIDED  
STICKY PAD  
10 X 15MM  
STICKY PAD DS 10X15MM  
SP2  
DOUBLE SIDED  
STICKY PAD  
10 X 15MM  
DISP1  
LED RED/GRN 3MM  
6
R35  
10K SM  
R36  
R39  
2K2 SM  
+5V  
+5V  
Graphics Display  
LM393A SM  
R74  
10K SM  
10K SM  
0V_D  
0V_D  
R40  
4K7 SM  
R47  
4K7 SM  
Z6B  
Z8A  
0V_D  
R73  
10K SM  
IRIN  
R50  
TRANSMIT  
RECEIVE  
SAMHOLD  
+5V  
5
SAMTX2  
+5V  
3
2
IRIN  
Q4  
2V7  
7
2V7  
1
10K SM  
6
SAMDATA  
SAMBUSY  
STICKY PAD DS 10X15MM  
BC847B  
DC1  
LM393A SM  
R38  
1K2 SM  
LM393A SM  
R46  
1K2 SM  
+5V  
DISPLAY CRADLE  
E916PM  
R37  
10K SM  
R45  
10K SM  
VFD_VDD2  
Z6A  
Z8B  
LEFTAUDIO  
0V5  
2
0V5  
6
Q3  
BC847B  
R76  
10U EL SM  
C11  
IROUT  
B1013  
DISPLAY CRADLE E916PM  
DC2  
+5V  
1
SAMRX2  
7
10K SM  
+
3
0V_D  
5
0V_D  
+5V  
R75  
10K SM  
0V_D  
Q_54  
2
DISPLAY CRADLE  
E916PM  
R43  
100K SM  
LM393A SM  
LM393A SM  
DISPLAY CRADLE E916PM  
R41  
100K SM  
Z11A  
O/P  
O/P  
+5V  
0V_D  
AD8532 SM  
C6  
100N SM  
Z7A  
+5V  
LM393A SM  
+5V  
3
2
R58  
3
2
R49  
10K SM  
RX1  
1
R52  
1
SBX1610-52/PIC-26043TM2  
F1CLOCK  
R56  
10K SM  
0R0 SM  
100R SM  
R42  
100K SM  
R44  
100K SM  
0V_D  
SW18  
ALPS_ENCODER  
5
6
R59  
7
R53  
1
2
PHASEA  
PHASEB  
F2CLOCK  
0R0 SM  
A
B
+5V  
C9  
100R SM  
0V_D  
R57  
10K SM  
Z11B  
AD8532 SM  
100N SM  
3
C
Programming adaptor  
SK4  
0V_D  
0V_D  
2
4
6
8
10  
12  
14  
1
3
5
7
9
RECEIVE  
TRANSMIT  
RESPIN  
VPROG  
PB0  
0V_D  
SAMHOLD  
11  
13  
+5V  
HEADER 7X2HORIZ  
+
C14  
10U EL SM  
C3  
0V_D  
+5V  
100N SM  
SK2  
+5V  
1
2
3
4
5
0V_D  
+5V  
SAMDATA  
Q_19  
Z1  
SAMBUSY  
Q_20  
C17  
100N SM  
+5V  
+5V  
BAS16W SM  
D2  
R26  
0V_D  
1
Vcc  
2
75  
AMPCT5  
MD2  
MD1  
MD0  
PB0  
74  
73  
72  
71  
70  
69  
68  
67  
66  
65  
64  
63  
62  
61  
60  
59  
58  
57  
56  
55  
54  
53  
52  
51  
0V_D  
+5V  
PB0  
3
10K SM  
STANDBY  
SP1ON  
SP2ON  
R55  
10K SM  
SEL7  
SEL6  
SEL5  
SEL4  
SEL3  
SEL2  
SEL1  
PB1  
4
To power amp / PSU  
PB2  
5
P6.6/LWR  
P6.5/HWR  
P6.4/RD  
P6.3/AS  
Vcc  
XTAL  
EXTAL  
Vss  
NM1  
RES  
STBY  
CLKOUT  
P6.2/BACK  
P6.1/BREQ  
P6.0/WAIT  
Vss  
P5.3/A19  
P5.2/A18  
P5.1/A17  
P5.0/A16  
P2.7/A15  
P2.6/A14  
SK1  
14  
13  
12  
11  
10  
9
+SUP  
Q_121  
C1  
18P SM  
PB3  
6
C60A 100PX4 SM  
C60C 100PX4 SM  
C61A 100PX4 SM  
C61C 100PX4 SM  
C62A 100PX4 SM  
C62C 100PX4 SM  
C63A 100PX4 SM  
PB4  
7
D3  
BAS16W SM  
THERMPROT  
C60B 100PX4 SM  
C60D 100PX4 SM  
C61B 100PX4 SM  
C61D 100PX4 SM  
C62B 100PX4 SM  
C62D 100PX4 SM  
C63B 100PX4 SM  
C63C 100PX4 SM  
C63D 100PX4 SM  
PB5  
8
X1  
16MHZ SM  
PB6  
9
Q_122  
STANDBY  
SP1ON  
SP2ON  
PB7  
Vpp/RESO  
Q_123  
Q_124  
Q_125  
VPROG  
10  
0V_D  
+5V  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
C2  
Vss  
R64  
C12  
DISPDAT  
DISPCLK  
18P SM  
+
+
8
THERMPROT  
C33  
C34  
220U EL  
TxD0/P9.0  
TxD1/P9.1  
RxD0/P9.2  
RxD1/P9.3  
IRQ4/SCK0/P9.4  
IRQ5/SCK1/P9.5  
D0/P4.0  
D1/P4.1  
D2/P4.2  
D3/P4.3  
Vss  
Q_126  
TRANSMIT  
RECEIVE  
H8/3048F  
RESPIN  
7
6
5
VIPROT  
DCPROT  
220U EL  
100R SM  
Q_127  
Q_128  
ACPRESEN
100N SM  
C4  
R65  
100N SM  
SAMTX2  
SAMRX2  
BUT17  
+5V  
Z2  
0V_D  
4
Q_129  
3
2
3
IRIN  
100R SM  
R67  
Vcc  
Res  
(FIT CLOSE TO SK1)  
R66  
100R SM  
DISPBLK  
DISPLAT  
2
1
C7  
TONEID  
SDATA  
BUT9  
BUT8  
BUT7  
BUT6  
BUT2  
IND3  
4
1
100R SM  
Gnd  
Gnd  
FFC 14W 2.54MM HOR  
0V_D  
DS1233 SM  
SLOAD  
SCLK  
100N SM  
0V_D  
D4/P4.4  
D5/P4.5  
D6/P4.6  
C31  
10P SM  
C32  
10P SM  
CHASSIS 2  
0V_D  
0V_D  
0V_D  
0V_D  
H8/3048F  
+5V  
R51  
100R SM  
To preamp board  
SK3  
D5  
BAS16W SM  
+SUP  
VFD_VDD2  
0V_D  
C50A 100PX4 SM  
C50C 100PX4 SM  
C51A 100PX4 SM  
C51C 100PX4 SM  
C52A 100PX4 SM  
C52C 100PX4 SM  
C53A 100PX4 SM  
C53C 100PX4 SM  
C54A 100PX4 SM  
C54C 100PX4 SM  
C55A 100PX4 SM  
C55C 100PX4 SM  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
SEL1  
C50B 100PX4 SM  
C50D 100PX4 SM  
C51B 100PX4 SM  
C51D 100PX4 SM  
C52B 100PX4 SM  
C52D 100PX4 SM  
C53B 100PX4 SM  
C53D 100PX4 SM  
C54B 100PX4 SM  
C54D 100PX4 SM  
C55B 100PX4 SM  
C55D 100PX4 SM  
SEL2  
SEL3  
SEL4  
SEL5  
SEL6  
SEL7  
SEL8  
SEL9  
Z12  
7815  
+5V  
+5V  
I
O
C5  
Vin  
Vout  
100N SM  
R32  
+
+
+
10K SM  
C29  
C26  
10U EL SM  
Z6C  
LM393A SM  
Z7C  
C16  
100N SM  
0V_D  
Z8C  
LM393A SM  
Z11C  
AD8532 SM  
C28  
10U EL SM  
100U EL SM  
C27  
100N SM  
C10  
C15  
C25  
LM393A SM  
100N SM  
100N SM  
100N SM  
Z5  
24C02 SM  
LEFTAUDIO  
D4  
22V 350MW SM  
4
8
MUTE  
TONE  
VSS  
VDD  
0V_D  
Q_117  
C8  
100N SM  
8
7
6
5
4
3
2
1
TONEID  
Q_118  
SDATA  
Q_119  
0V_D  
SLOAD  
Q_120  
DRAWING TITLE  
0V_D  
SCLK  
MARY AMP DISPLAY PCB  
FFC 22W 1MM HOR  
Circuit Diagram  
2
3 4 2  
5
0V_D  
Notes:  
CHASSIS 1  
EDD  
19/07/2001 IR DUAL FOOTPRINT ADDED  
2.0  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
ISSUE 1.1  
00_1103  
JBR 29 SEP 2000 SW1 TO SW10 CHANGED  
0V_D  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
Sheet 2 of 2  
ISSUE  
Drawn by:  
Filename  
Cambridge CB5 9PB  
L865C2  
DRAWING NO.  
JBR  
J:\Completed_Projects\A85 (Mary)\mary display\L865_2\l865_2.0 dbase.ddb - Documents\L8658C-J2_a2n.0-2.S0C0H2  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
D
C
B
A
D
C
B
A
LEFT CHANNEL  
L870C2_2.0.SCH  
+15V  
Q_5  
Q_1  
Q_3  
SK1  
PHONO2HG  
LEFT IN  
LEFT OUT  
SK2  
1
1
2
3
4
5
6
7
8
0V_SIG  
Q_2  
EMC  
C1  
RIGHT CHANNEL  
L870C3_2.0.SCH  
100N CD  
Q_4  
Q_6  
RIGHT IN  
RIGHT OUT  
0V_SIG  
AMPCT8  
Q_8  
Q_7  
0V_SIG  
-15V  
0V_HF  
DRAWING TITLE  
PCB1  
EL1  
A85 PHONO STAGE - TOP LEVEL  
PCB  
Update Box  
Circuit Diagram  
UPDATE_BOX  
L870PB_2  
2 3 4 2 5  
Notes:  
01_1070  
00_1051  
JAG  
JAG  
17/4/01  
updated pcb and scm  
2
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
22/3/01  
PRODUCTION ISSUE  
1
ECO No. INITIALS  
Date Printed  
G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870c1_2.0.PRJ  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
JBR  
Filename  
Cambridge CB5 9PB  
Sheet 1 of 3  
DRAWING NO. L870C1  
23-Apr-2001  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
+15V  
Q_102  
+
C102  
100U SILMIC  
C104  
100N PE  
C119  
D
C
B
A
0V_HF  
R101  
100R MF  
0V_SIG  
D
C
B
A
R100  
R102  
330R MF  
100R MF  
100P PP  
C101  
TR100  
BC556B  
TR102  
BC556B  
TR103  
1N0 PP  
BC556B  
C110  
TR101  
BC556B  
+ C100  
22U EL  
4N7 PP  
C120  
1N0 PP  
C112  
R109  
12K MF  
TR108  
TR109  
BC546B  
BC546B  
10N PP AX  
C111  
R115  
R110  
12K MF  
15K MF  
10N PP AX  
R118  
22R MF  
LEFT IN  
R112  
D100  
100K MF  
1N4148  
C106  
100N PE  
SW100B  
4PCO  
C113  
C105  
100N PE  
C115  
1N3 PP  
R116  
LEFT OUT  
1U0 PE  
2M2 MF  
R119  
22R MF  
TR106  
2SA1085  
TR107  
IC100  
3
R122  
39K MF  
2SA1085  
R117  
2M2 MF  
C118  
Q_101  
R111  
6
2
56K MF  
10U NP  
TL071CD  
R124  
5K6 MF  
SW100D  
4PCO  
R113  
100K MF  
0V_SIG  
R108  
47K MF  
TR104  
TR105  
BC556B  
BC556B  
C109  
100P PPW  
R104  
100R MF  
C108  
470P PPW  
R114  
10R MF 100K MF  
R105  
100R MF  
R123  
C117  
470P PPW  
C116  
0V_SIG  
0V_SIG  
470P PPW  
TR112  
BC546B  
TR113  
BC546B  
TR110  
BC546B  
TR111  
BC546B  
TR114  
BC546B  
D101  
1N4148  
D102  
1N4148  
R106  
100R MF  
C107  
100N PE  
+
R120  
22R MF  
R121  
22R MF  
0V_HF  
C103  
100U SILMIC  
0V_SIG  
Q_103  
-15V  
DRAWING TITLE  
A85 PHONO STAGE - LEFT CHANNEL  
Circuit Diagram  
2 3 4 2 5  
Notes:  
01_1070  
00_1051  
JAG  
JAG  
17/4/01  
updated pcb and scm  
2
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
22/3/01  
PRODUCTION ISSUE  
1
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
JBR  
Filename  
Cambridge CB5 9PB  
Sheet 2 of 3  
DRAWING NO. L870C2  
G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C2_2.0.SCH 23-Apr-2001  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
+15V  
Q_202  
+
C202  
100U SILMIC  
C204  
100N PE  
C219  
D
C
B
A
0V_HF  
R201  
100R MF  
0V_SIG  
D
C
B
A
R200  
R202  
330R MF  
100R MF  
100P PP  
C201  
TR200  
BC556B  
TR202  
BC556B  
TR203  
1N0 PP  
C210  
BC556B  
TR201  
BC556B  
4N7 PP  
C220  
+ C200  
22U EL  
1N0 PP  
C212  
R209  
12K MF  
TR208  
TR209  
BC546B  
BC546B  
10N PP AX  
C211  
R215  
R210  
12K MF  
15K MF  
10N PP AX  
R218  
22R MF  
RIGHT IN  
R212  
D200  
100K MF  
1N4148  
C206  
100N PE  
SW100A  
4PCO  
C213  
C205  
100N PE  
C215  
R216  
RIGHT OUT  
1N3 PP  
1U0 PE  
2M2 MF  
R219  
22R MF  
TR206  
2SA1085  
TR207  
IC200  
3
R222  
39K MF  
2SA1085  
R217  
2M2 MF  
Q_201  
R211  
6
2
56K MF  
TL071CD  
C218  
10U NP  
SW100CR224  
4PCO 5K6 MF  
R213  
100K MF  
0V_SIG  
R208  
47K MF  
TR204  
TR205  
BC556B  
BC556B  
C208  
C209  
R204  
100R MF  
100P PPW  
R214  
10R MF 100K MF  
R205  
R223  
100R MF  
470P PPW  
C217  
470P PPW  
C216  
470P PPW  
0V_SIG  
0V_SIG  
TR212  
BC546B  
TR213  
BC546B  
TR210  
BC546B  
TR211  
BC546B  
TR214  
BC546B  
D201  
1N4148  
D202  
1N4148  
R206  
100R MF  
C207  
100N PE  
+
R220  
22R MF  
R221  
22R MF  
0V_HF  
C203  
0V_SIG  
100U SILMIC  
Q_203  
-15V  
DRAWING TITLE  
A85 PHONO STAGE - RIGHT CHANNEL  
Circuit Diagram  
2 3 4 2 5  
Notes:  
01_1070  
00_1051  
JAG  
JAG  
17/4/01  
updated pcb and scm  
2
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
22/3/01  
PRODUCTION ISSUE  
1
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
JBR  
Filename  
Cambridge CB5 9PB  
Sheet 3 of 3  
DRAWING NO. L870C3  
G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C3_2.0.SCH 23-Apr-2001  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
+5V_D  
TP102  
SK100  
1
2
TP103  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
D
C
B
A
0V_D  
D
C
B
A
SPKR1 ON  
SPKR2 ON  
THERMPROT  
VIPROT1  
TP104  
TP105  
TP106  
TP107  
TP108  
DCPROT1  
+5V_D  
+5V_D  
R107  
0V_SIG  
SP100  
TH100  
PTH90DEG  
0V_D  
FFC 14W 2.54MM VER  
2R2 SM  
C100  
100N SM  
+
C101  
0V_D  
IC100G  
74HC14D  
C102  
100U EL  
IC100E  
PIN 1 TO THE LEFT AS YOU LOOK FROM THE FRONT  
TP116  
100N SM  
11  
10  
12  
THERMPROT  
0V_LS  
0V_HF  
STAR POINT 8  
R100  
1K0 SM  
74HC14D  
IC100F  
0V_PSU  
13  
74HC14D  
0V_D  
IC100A  
IC100B  
R101  
+49V  
1
23  
4
8
VIPROT1  
1K0 SM  
C103  
10N SM  
74HC14D  
IC100C  
74HC14D  
IC100D  
RLY101B  
RLY SPST SPKR  
RLY100B  
D100  
1N4003F  
RLY SPST SPKR  
D101  
R102  
5
69  
DCPROT1  
1N4003F  
1K0 SM  
C104  
10N SM  
74HC14D  
74HC14D  
SK101  
TP109  
1
L911C2_1  
L911C2_1.1.SCH  
TR101  
BD179  
R105  
F
TR100  
BD179  
SPKR1 ON  
SPKR2 ON  
INPUT  
0V_SIG  
0V_LS  
0V_HF  
VPOS  
VNEG  
VIPROT  
DCPROT  
OUTPUT  
0V_D  
RLY101A  
100R SM  
TP111  
SK102A  
SK102B  
EMC  
C105  
TP112  
RLY100A  
TP113  
N
+49V  
-49V  
Top+  
Top-  
Bot+  
Bot-  
R106  
1N0 SM  
RLY SPST SPKR  
RLY SPST SPKR  
100R SM  
PHONO2G  
TP110  
0V_SIG  
R103  
R104  
220R SM  
0V_HF  
0V_LS  
220R SM  
0V_LS  
0V_D  
+49V  
TP100  
BR100  
BRGBU8D  
TP114  
+
+
C106  
10,000u 63V  
PB  
C108  
100N PC  
PCB  
3
2
~
~
L911PB_1  
C107  
10,000u 63V  
0V_PSU  
SK103  
C109  
100N PC  
MOLEXPWR4  
TP101  
DRAWING TITLE  
TP115  
POWER AMP SUPPLY  
AP85 third channel - top level  
Circuit Diagram  
23425  
-49V  
Notes:  
01_1101  
01_1018  
JR  
JR  
4/6/01  
DC OFFSET CHANGES  
PRODUCTION ISSUE  
1.1  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
30/1/01  
1.0  
ECO No. INITIALS  
Date Printed  
DATE  
DESCRIPTION OF CHANGE  
Sheet 1 of 2  
ISSUE  
Drawn by:  
J Reckless  
Filename  
Cambridge CB5 9PB  
L911C1  
DRAWING NO.  
4-Jun-2001  
J:\ECO_wip\01_1101 A85 RANGE PCB FUSES AND DC OFFSET\L911_1.1.DDB - Documents\L911C1_1.1.PRJ  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
VPOS  
D
C
B
A
D
C
B
A
R319  
100R SM  
R315  
100R SM  
R316  
100R SM  
R300  
10K SM  
PRE DRIVER  
PNP CURRENT MIRROR  
TR310  
FMMT497  
TR300  
FMMT597  
TR301  
FMMT597  
R301  
10K SM  
+
R321  
22R SM  
TR302  
FMMT597  
C300  
100U EL  
DZ300  
15V 350MW SM  
TR309  
FMMT497  
TR321  
FMMT597  
R338  
150R SM  
OUTPUT STAGE  
V-I PROTECTION  
R329  
4K7 SM  
R305  
10K SM  
VI PROTECT  
SIGNAL TO MICRO  
D301  
BAS16W SM  
C307  
R333  
TP307  
0V_HF  
TR318  
SAP15N  
R334  
22K SM  
VIPROT  
3K3 SM  
100P SM  
DZ305  
4V7 350MW SM  
+
TR311  
FMMT497 C317  
R306  
10K SM  
C305  
10U EL  
TP305  
R341  
D303  
1N4003F  
TR312  
FMMT497  
TR313  
FMMT497  
DC SERVO  
R347  
R349  
BOOTSTRAP  
330R SM  
100R SM  
R345  
100R SM 0R0 SM  
100R SM  
+
470N PE  
R325  
1K0 SM  
R343  
C302  
100U EL 100V  
C310  
100N SM  
R330  
6
IC300B  
ADJ BIAS  
7
0V_HF  
1M0 SM  
5
+
PL300  
C303  
0V_SIG  
RV300  
100R PSET  
R340  
100K SM  
1
2
100U EL  
R328  
4K7 SM  
TL072CD  
0V_SIG  
R351  
R352  
470R 2W  
5R6 2W CF  
D300  
BAS16W SM  
TP302  
MEASURE  
BIAS  
R331  
INPUT FILTER  
R324  
V TO I AMP  
1K5 SM  
0V_SIG  
IC300A  
L300  
2U2H LAC SMALL  
3
2
INPUT  
TP304  
OUTPUT  
R332  
1
1K0 SM  
DZ302  
DC OFFSET SIGNAL  
TO MICRO  
470R 2W  
R353  
1K8 SM  
4V7 350MW SM  
TL072CD  
R322  
22R SM  
R327  
22K SM  
R355  
6K8 SM  
R350  
5R6 2W CF  
DCPROT  
R303  
10K SM  
+
+
TR322  
FMMT497  
C318  
C304  
DZ303  
C316  
470P PPW  
C312  
10N SM  
ZOBEL NETWORK  
10U EL  
100U EL  
4V7 350MW SM  
R337  
22R SM  
TR305  
FMMT597  
C311  
100N PC  
C319  
100N PE  
DC OFFSET  
DETECTION  
R326  
1K0 SM  
R344  
R346  
100R SM 0R0 SM  
R304  
10K SM  
0V_SIG  
+
C313  
C306  
TP303  
C309  
100N SM  
0V_SIG  
R354  
1K0 SM  
TR304  
FMMT597  
100U EL 100V  
0V_LS  
R348  
100R SM  
D304  
1N4003F  
0V_SIG  
R308  
22K SM  
TP306  
R342  
BOOTSTRAP  
TR303  
FMMT597  
R302  
10K SM  
100N SM  
0V_HF  
R307  
10K SM  
330R SM  
0V_HF  
0V_LS  
TP308  
C308  
R336  
22K SM  
R335  
3K3 SM  
C314  
100N SM  
D302  
BAS16W SM  
TR319  
SAP15P  
TR316  
FMMT497  
100P SM  
R339  
150R SM  
R310  
4K7 SM  
R313  
DZ306  
4V7 350MW SM  
C320  
100U NP  
0V_SIG  
TR320  
FMMT497  
R314  
10K SM  
DZ301  
15V 350MW SM  
OUTPUT STAGE  
10K SM  
V-I PROTECTION  
+
C315  
100N SM  
0V_HF  
TR306  
FMMT597  
R323  
22R SM  
C301  
100U EL  
0V_HF  
0V_HF  
TR314  
FMMT497  
TR315  
FMMT497  
R309  
10K SM  
TR307  
FMMT597  
TR308  
FMMT597  
NPN CURRENT MIRROR  
PRE DRIVER  
R317  
100R SM  
R318  
100R SM  
R311  
10K SM  
TR317  
FMMT497  
R320  
100R SM  
R312  
10K SM  
VNEG  
DRAWING TITLE  
AP85 third channel - output stage  
Circuit Diagram  
23425  
Notes:  
01_1101  
01_1018  
JR  
JR  
4/6/01  
DC OFFSET CHANGES  
PRODUCTION ISSUE  
1.1  
A & R Cambridge Ltd.  
Pembroke Avenue  
Denny Industrial Centre  
Waterbeach  
30/1/01  
1.0  
ECO No. INITIALS DATE  
Date Printed  
4-Jun-2001  
DESCRIPTION OF CHANGE  
Sheet 2 of 2  
ISSUE  
Drawn by:  
J Reckless  
Filename  
L911C2_1.1.SCH  
Cambridge CB5 9PB  
DRAWING NO. L911C2  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
+5V_D  
Q1  
BC556B  
R3  
10K MF  
R5  
10K MF  
R7  
10K MF  
R1  
10K MF  
SK1  
+5V_D  
Q2  
BC556B  
14  
13  
12  
11  
10  
9
R4  
10K MF  
R6  
10K MF  
R8  
10K MF  
R2  
10K MF  
D
C
B
A
Q4  
BC556B  
Q3  
BC556B  
D
C
B
A
STANDBY  
SPKR1 ON  
SPKR2 ON  
THERMPROT 1  
VIPROT 1  
R12  
560R MF  
R13  
560R MF  
8
7
6
5
4
3
2
1
R14  
330R MF  
R15  
180R MF  
Z1  
PB5  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
28  
DCPROT 1  
AC PRESENT  
TRIGGER  
SP2 SW  
DCPROT  
VIPROT  
PB6  
PB7  
PA4  
PA5  
PA6  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
SP1 SW  
PB4  
PA3  
PA2  
PA1  
PA0  
PB3  
PB2  
PB1  
PB0  
VSS  
SP1 LED  
SP2 LED  
PWR GRN  
PWR RED  
LED3  
+5V_D  
REMOTE  
SPKR2 ON  
SPKR1 ON  
STANDBY  
PWR SW  
LED1  
LED2  
PA7  
X1  
CST4.00  
OSC2  
OSC1  
VDD  
RES  
PC5  
REMOTE  
TRIGGER  
AC PRESENT  
0V_D  
D1  
R16  
(TMR)/INT PC4  
PC0  
PC1  
100K MF  
THERMPROT  
PC3  
PC2  
1N4148  
SK2  
+5V_D  
HT48R30 28-DIP-B-0  
C1  
100N CD  
14  
13  
12  
11  
10  
9
8
7
6
5
0V_D  
+
C5  
10U EL  
SPKR1 ON  
SPKR2 ON  
THERMPROT 2  
VIPROT 2  
SW1  
A1503  
SW2  
A1503  
SW3  
A1506  
0V_D  
DCPROT 2  
4
3
2
1
R9  
R10  
R11  
10K MF 10K MF 10K MF  
0V_D  
0V_D  
Z2A  
1
2
THERMPROT 1  
THERMPROT 2  
3
6
8
THERMPROT  
+5V_D  
SPKR1 ON  
74HC32  
Z2B  
+
C14  
100U EL  
4
5
VIPROT 1  
VIPROT 2  
Q5  
+5V_D  
VIPROT  
R19  
BC546B  
470R MF  
Z2D  
12  
13  
74HC32  
Z2C  
Z2E  
74HC32  
11  
+
+
+
C6  
100U EL  
C7  
100U EL  
C8  
100U EL  
C2  
C3  
C4  
R17  
10K MF  
0V_D  
100N CD 100N CD 100N CD  
9
DCPROT 1  
DCPROT 2  
SPKR2 ON  
DCPROT  
74HC32  
10  
BY SK1  
BY SK2  
BY Z1  
D2  
1N4148  
0V_D  
74HC32  
Q6  
R20  
BC546B  
470R MF  
R18  
10K MF  
FIX1  
FIX2  
FIX3  
FIX4  
FIX5  
0V_D  
FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE FIXING HOLE  
STANDBY  
Q7  
R21  
C9  
100N CD  
C10  
100N CD  
C11  
C12  
100N CD  
C13  
BC546B  
100N CD  
100N CD  
470R MF  
TL1  
TOOLING  
TL2  
TOOLING  
0V_D  
0V_D  
0V_D  
DRAWING TITLE  
P85 microcontroller and switch  
EL1  
PCB  
EL2  
Update Box  
UPDATE_BOX  
DD1  
PS  
DD2  
DD3  
Drilling  
Detail  
A3 Vertical  
Layout by  
Cliff  
PCB MATERIAL  
FR4, 1 OZ Cu  
PCB  
Photo Strip  
Circuit Diagram  
Paper Marker  
Notes:  
FR4_1OZ  
PHOTO_STRIP  
DRILL_DWG  
DD_A3V  
CLOGO  
L910PB_1  
A & R Cambridge Ltd.  
Pembroke Avenue  
CL  
28/09/00  
PRODUCTION RELEASE  
1.0  
00_1099  
Denny Industrial Centre  
Waterbeach  
ECO No. INITIALS  
DATE  
DESCRIPTION OF CHANGE  
ISSUE  
Drawn by:  
CG  
Date Printed  
Filename  
Cambridge CB5 9PB  
Sheet 1 of 1  
DRAWING NO. L910CT  
29-Sep-2000  
J:\ECO_wip\00_1099 L910PB_1.0\L910AY_1\L910AY_1.ddb - L910CT_1.sch  
1
2
3
4
5
6
7
8
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101A  
Doc ume nt t i t l e : A85 POWER AMPLI FI ER AND PSU  
Doc ume nt numbe r : L882RS  
Da t e : 06/ 06/ 01  
I s s ue :  
3
Re vi s i on:  
2
Cr e a t e d by: J R  
Pa ge 1 of  
3
(Excluding parts for NF.)  
Part  
Qty Iss  
Description  
Designators  
******** PCB Finish items:  
******** (For drawing office use only. Will be  
******** kitted from mechanical run-out sheet.)  
C12207  
F022  
2
2
FUSE 20mm 2A AS  
INS COVER PCB FUSEHOLDER  
F200 F201  
F200 F201  
******** PCB Build items:  
1A000  
1A010  
1A022  
4
3
8
RES SM W4 1% 0R0 1206  
RES SM W4 1% 10R 1206  
RES SM W4 1% 22R 1206  
R345 R346 R445 R446  
R217 R220 R221  
R321 R322 R323 R337  
R421 R422 R423 R437  
R101 R102 R315 R316  
R317 R318 R319 R320  
R343 R344 R347 R348  
R349 R415 R416 R417  
R418 R419 R420 R443  
R444 R447 R448 R449  
R338 R339 R438 R439  
R107 R108  
R341 R342 R441 R442  
R226  
R200 R201 R202 R203  
R204 R205 R206 R207  
R227 R324 R325 R326  
R354 R424 R425 R426  
R454  
1A110  
24  
RES SM W4 1% 100R 1206  
1A115  
1A122  
1A133  
1A147  
1A210  
4
2
4
1
RES SM W4 1% 150R 1206  
RES SM W4 1% 220R 1206  
RES SM W4 1% 330R 1206  
RES SM W4 1% 470R 1206  
RES SM W4 1% 1K0 1206  
17  
1A215  
1A218  
3
5
RES SM W4 1% 1K5 1206  
RES SM W4 1% 1K8 1206  
R230 R331 R431  
R219 R224 R225 R332  
R432  
1A233  
1A247  
4
11  
RES SM W4 1% 3K3 1206  
RES SM W4 1% 4K7 1206  
R333 R335 R433 R435  
R212 R213 R214 R215  
R216 R310 R328 R329  
R410 R428 R429  
1A268  
1A310  
2
33  
RES SM W4 1% 6K8 1206  
RES SM W4 1% 10K 1206  
R355 R455  
R208 R209 R210 R211  
R218 R222 R223 R300  
R301 R302 R303 R304  
R305 R306 R307 R309  
R311 R312 R313 R314  
R400 R401 R402 R403  
R404 R405 R406 R407  
R409 R411 R412 R413  
R414  
1A322  
8
RES SM W4 1% 22K 1206  
R308 R327 R334 R336  
R408 R427 R434 R436  
R228 R229 R340 R440  
R330 R430  
R350 R450  
R105 R106  
R103 R104  
R100 R351 R451  
R352 R353 R452 R453  
R231  
1A410  
1A510  
1C856  
1E110  
1E133  
1H010  
1J147  
1K515  
1T002  
4
2
2
2
2
3
4
1
1
RES SM W4 1% 100K 1206  
RES SM W4 1% 1M0 1206  
RES CF 2W 5R6 5%  
RES CF 1W 100R 5%  
RES CF 1W 330R 5%  
RES MF W4 1% 10R  
RES 2W MF 5% 470R  
RES W25 5% VR25 1M5  
THERMISTOR SIEMENS B59008  
TH200  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101A  
Doc ume nt t i t l e : A85 POWER AMPLI FI ER AND PSU  
Doc ume nt numbe r : L882RS  
Da t e : 06/ 06/ 01  
I s s ue :  
3
Re vi s i on:  
2
Cr e a t e d by: J R  
Pa ge 2 of  
3
2A410  
2C110  
2C210  
2C310  
3
4
3
11  
CERD 100N 63V 20% RA  
C224 C225 C226  
C307 C308 C407 C408  
C100 C231 C235  
C213 C214 C215 C216  
C217 C218 C219 C221  
C230 C312 C412  
C201 C202 C203 C204  
C220 C232 C309 C310  
C313 C314 C315 C409  
C410 C413 C414 C415  
C316 C416  
MLC 100P 50V NPO 5% SM  
MLC 1N0 50V X7R 10% SM  
MLC 10N 50V X7R 10% SM  
2C410  
16  
MLC 100N 50V X7R 10% SM  
2D147W  
2D168  
2D422  
2H410  
2K233  
2K410  
2K447  
2N610  
2
1
1
4
4
2
2
7
PPRO W 470P 63V 5% RA  
PPRO 680P 5% 63V RA  
220NF CLASS X2 CAP 275VRMS  
PCRB 100N 100V 10% RA 5mm  
SUPPR CAP 3N3 250V  
PEST 100N 63V 10%  
C200  
C234  
C211 C212 C311 C411  
C205 C206 C207 C208  
C319 C419  
PEST 470N 63V 10%  
ELST 10U 50V  
C317 C417  
C222 C223 C233 C305  
C318 C405 C418  
C229  
C300 C301 C303 C304  
C400 C401 C403 C404  
C302 C306 C402 C406  
C228  
C227  
C209 C210  
C320 C420  
D205 D206 D300 D301  
D302 D400 D401 D402  
D100 D101 D200 D201  
D202 D203 D303 D304  
D403 D404  
2N622  
2N710  
1
8
ELST 22U 63V  
ELST 100U 25V  
2N710B  
2N810A  
2N833  
2N910A  
2V710  
4
1
1
2
2
8
ELST 100U 100V  
ELST 1M0 10V  
ELST 3M3 25V  
ELST 10m 63V RA 35mm  
ELST NON POLAR 100UF 16V  
DIODE SS SM BAS16W  
3AS16W  
3B4003  
10  
RECTIFIER 1N4003F 1A 200V  
3BGBU8D 1  
3CW315V 5  
BRIDGE RECTIFIER 8A 200V  
ZENER 15V OW35 SM SOT23  
BR200  
DZ207 DZ300 DZ301  
DZ400 DZ401  
3CW34V7 9  
ZENER 4V7 OW 35 SM SOT23  
DZ204 DZ302 DZ303  
DZ305 DZ306 DZ402  
DZ403 DZ405 DZ406  
TR204  
4A849B  
4A856B  
1
2
TRANS LF SS N SM BC849B  
TRANS LF SS P SM BC856B  
TRANS LF SS N SM FMMT497  
TR205 TR206  
4AFMMT497 24  
TR201 TR203 TR309  
TR310 TR311 TR312  
TR313 TR314 TR315  
TR316 TR317 TR320  
TR322 TR409 TR410  
TR411 TR412 TR413  
TR414 TR415 TR416  
TR417 TR420 TR422  
TR202 TR300 TR301  
TR302 TR303 TR304  
TR305 TR306 TR307  
TR308 TR321 TR400  
TR401 TR402 TR403  
TR404 TR405 TR406  
TR407 TR408 TR421  
TR100 TR101 TR200  
TR318 TR418  
4AFMMT597 21  
TRANS LF SS P SM FMMT597  
4B179  
3
NPN TRANS MP BD179  
4CSAP15N 2  
4CSAP15P 2  
TRANS POWER NPN SAP15N  
TRANS POWER PNP SAP15P  
IC AUDIO SM DUAL TL072  
TR319 TR419  
IC300 IC400  
5B072D  
2
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101A  
Doc ume nt t i t l e : A85 POWER AMPLI FI ER AND PSU  
Doc ume nt numbe r : L882RS  
Da t e : 06/ 06/ 01  
I s s ue :  
3
Re vi s i on:  
2
Cr e a t e d by: J R  
Pa ge 3 of  
3
5D7805  
5J7414D 1  
5M393AD 1  
1
IC VREG POS 7805  
IC201  
IC202  
IC200  
RV300 RV400  
TX200  
L300 L400  
L200  
SK203  
SURFACE MOUNT HEX SCHMITT TRIGGER  
IC COMPARATOR SM DUAL LM393A  
PRES 100R LIN HORIZ  
TRANSFORMER 3VA 9V+9V TYPE 9301  
INDUCT 2U2 12x20mm  
6F110  
2
1
2
1
1
1
1
1
2
1
1
3
1
4
7A9301  
7D002C  
7D327  
8A001  
8D225  
8D301  
8D302  
8D418G  
8K2306  
8K2308  
8K2404  
8K2406  
8K6201  
27mH INDUCTOR  
IEC MAINS CONN PCB INS PX  
PHONO SKT 4-WAY EMC GOLD  
STEREO JACK PCB  
SK104  
SK105  
MIN JACK DUAL 3.5mm HSJ1002-01-1020 SK201  
CAMCON BINDING POST 4WAY GOLD  
MOLEX MINI FIT HCS 6 WAY  
MOLEX MINI FIT HCS 8 WAY  
4-WAY AMP CT CONN  
6-WAY AMP CT CONN  
2WAY MOLEX VERT MALE CONNECTOR  
SK100 SK101  
SK200  
SK204  
SK102 SK106 SK107  
SK205  
PL100 PL101 PL300  
PL400  
8K7014  
8M101  
8Q003  
8S004  
A1008  
A1404  
A207  
1
1
1
2
1
1
2
1
1
1
1
1
FFC 14W 2.54MM VER PTH  
EARTH LEAD  
CAGE CLAMP 16A 1 WAY ARC003-236  
FUSEHOLDER 20mm PCB  
SW PUSH 2PCO  
VOLTAGE SELECTOR SLIDE SWITCH  
RELAY G5Z-2A-E 24V  
RELAY MAINS DPDT 5V 5A  
FUSE R452 T750mA  
MAINS EMC SHIELD  
SK103  
EL  
SK202  
F200 F201  
SW100  
SW200  
RLY100 RLY101  
RLY200  
F202  
SH200  
HS200  
HS200  
PCB  
A219  
C3751  
E5402  
F006  
F008  
L882PB_3 1  
HEATSINK CLIP TO220 13/8.6 DC/W  
HEATSINK TO220 8.6 DEGC/W  
X PRINTED CIRCUIT BOARD  
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
L882PB_3 1 X PRINTED CIRCUIT BOARD PCB  
***************************************************************************  
*********************** Additions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
1A310  
1A322  
C3751  
2
2
1
RES SM W4 1% 10K 1206  
RES SM W4 1% 22K 1206  
FUSE R452 T750mA  
R314 R414  
R308 R408  
F202  
***************************************************************************  
*********************** Deletions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
1A247  
1A310  
C3501  
2
2
1
RES SM W4 1% 4K7 1206  
RES SM W4 1% 10K 1206  
FUSE R452 T500mA  
R314 R414  
R308 R408  
F202  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101  
Doc ume nt t i t l e : A85 PREAMPLI FI ER  
Doc ume nt numbe r : L866RS  
Da t e : 06/ 06/ 01  
I s s ue :  
Cr e a t e d by: J R  
3
Re vi s i on:  
1
Pa ge 1 of  
3
(Excluding parts for NF.)  
Part  
Qty Iss  
Description  
Designators  
1A022  
1A047  
1
6
RES SM W4 1% 22R 1206  
RES SM W4 1% 47R 1206  
R185  
R108 R109 R133 R134  
R186 R187  
1A122  
1A133  
1A147  
1A210  
1
2
1
14  
RES SM W4 1% 220R 1206  
RES SM W4 1% 330R 1206  
RES SM W4 1% 470R 1206  
RES SM W4 1% 1K0 1206  
R307  
R300 R304  
R303  
R100 R101 R102 R125  
R126 R127 R156 R157  
R158 R189 R190 R191  
R195 R196  
1A212  
1A222  
1A227  
1A247  
1A256  
1A310  
1A322  
1
4
4
1
2
4
41  
RES SM W4 1% 1K2 1206  
RES SM W4 1% 2K2 1206  
RES SM W4 1% 2K7 1206  
RES SM W4 1% 4K7 1206  
RES SM W4 1% 5K6 1206  
RES SM W4 1% 10K 1206  
RES SM W4 1% 22K 1206  
R302  
R110 R111 R135 R136  
R115 R116 R140 R141  
R203  
R117 R142  
R181 R182 R188 R204  
R112 R113 R114 R118  
R119 R120 R121 R137  
R138 R139 R143 R144  
R145 R146 R147 R148  
R149 R150 R151 R152  
R153 R154 R155 R162  
R163 R164 R165 R166  
R167 R168 R169 R170  
R171 R172 R173 R174  
R175 R176 R177 R178  
R179  
1A410  
16  
RES SM W4 1% 100K 1206  
R103 R104 R105 R128  
R129 R130 R159 R160  
R161 R180 R192 R193  
R194 R197 R198 R199  
R106 R107 R131 R132  
R183 R184  
R122 R123 R124 R200  
R201 R202  
C115 C136 C148 C149  
C158 C159  
1A510  
1A822  
2C022  
6
6
6
RES SM W4 1% 1M0 1206  
RES SM W4 1% 2R2 1206  
MLC 22P 50V NPO 5% SM  
2C110  
2C210  
4
6
MLC 100P 50V NPO 5% SM  
MLC 1N0 50V X7R 10% SM  
C108 C109 C129 C130  
C100 C121 C139 C160  
C164 C186  
2C310  
2C410  
1
36  
MLC 10N 50V X7R 10% SM  
MLC 100N 50V X7R 10% SM  
C119  
C104 C105 C106 C107  
C118 C125 C126 C127  
C128 C143 C144 C145  
C146 C152 C153 C155  
C156 C168 C169 C170  
C171 C172 C173 C174  
C175 C176 C177 C178  
C179 C180 C181 C182  
C183 C184 C185 C304  
C101 C102 C103 C122  
C123 C124 C140 C141  
C142 C161 C162 C163  
C165 C166  
2D147W  
14  
WIMA FKP2 470P 63V CAP  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101  
Doc ume nt t i t l e : A85 PREAMPLI FI ER  
Doc ume nt numbe r : L866RS  
Da t e : 06/ 06/ 01  
I s s ue :  
Cr e a t e d by: J R  
3
Re vi s i on:  
1
Pa ge 2 of  
3
2D210  
2D222W  
2H410  
2K447  
2
2
2
8
PPRO 1N0 5% 63V RA  
C314 C315  
C114 C135  
C147 C167  
C112 C113 C133 C134  
C150 C151 C192 C193  
C120 C154 C187 C188  
C189 C190 C191 C305  
C110 C131 C157  
C302 C312  
WIMA FKP2 2N2 63V CAP  
PCRB 100N 100V 10% RA 5mm  
PEST 470N 63V 10%  
2N610  
8
ELST 10U 50V  
2N710  
2N722  
2N747  
2N810C  
2N833  
3
2
1
2
2
ELST 100U 25V  
ELST 220U 16V  
ELST 470U 25V RA  
ELST 1M0 35V  
C306  
C300 C310  
C303 C313  
ELST 3M3 25V  
2P610CC 6  
ELEC 10U 50V CERAFINE  
C111 C116 C117 C132  
C137 C138  
D120 D302 D304 D305  
D308  
D100 D101 D102 D103  
D104 D105 D106 D107  
D108 D109 D110 D111  
D112 D113 D114 D115  
D116 D117 D118 D119  
D121 D122  
3AS16W  
3AV99W  
5
DIODE SS SM BAS16W  
DIODE SS SM BAV99W  
22  
3BS1D  
4
RECT S1D 1A 200V SM  
D300 D301 D306 D307  
3CW315V 2  
ZENER 15V OW35 SM SOT23  
TRANS LF SS N SM BC846B  
TRANS LF SS N SM BC849B  
TRANS LF SS P SM BC856B  
TRANS AUDIO DRIVER P 2SA1964  
TRANS AUDIO DRIVER N 2SC5248  
TRANS JFET N J112  
D310 D311  
Q306  
Q100  
Q307  
Q305  
Q301  
Q300 Q303  
Z108  
4A846B  
4A849B  
4A856B  
4B1964  
4B5248  
4J112  
1
1
1
1
1
2
1
5A1844  
IC DS1844S-010  
IC AUDIO DIGITAL VOL SM  
IC AUDIO SM DUAL TL072  
Z107  
Z109 Z110 Z111 Z112  
Z113 Z114  
Z115 Z116 Z117  
Z301  
5B2134  
5D317T  
3
1
IC OPAMP DUAL SM OPA2134PA  
IC VREG POS LM317T  
5S408DY 6  
IC 8 TO 1 MUX DG408DY SO16  
Z100 Z101 Z102 Z103  
Z104 Z105  
5S413DY 1  
IC QUAD SPST CMOS SW SO16  
PHONO SKT 4-WAY EMC GOLD  
PHONO SKT 2-WAY EMC GOLD  
MOLEX MINI FIT HCS 4 WAY  
4-WAY AMP CT CONN  
8-WAY AMP CT CONN  
4-WAY FR LOCK CONN  
22-WAY FFC CONN SM 1mm  
30-WAY FFC VERT CONN SM 1MM  
RELAY DPDT 5V SM NEC EB2-5NU  
FUSE R452 T750mA  
Z106  
SK2 SK3 SK4 SK5  
SK6  
SK300  
SK102  
SK103  
SK301  
SK100  
8D225  
4
1
1
1
1
1
1
1
1
2
8D226  
8K2304  
8K2404  
8K2408  
8K6604  
8K8322  
8K8330  
A216  
SK101  
RLY100  
F300 F301  
C3751  
L866PB_3 1  
X PRINTED CIRCUIT BOARD  
PCB1  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101  
Doc ume nt t i t l e : A85 PREAMPLI FI ER  
Doc ume nt numbe r : L866RS  
Da t e : 06/ 06/ 01  
I s s ue :  
Cr e a t e d by: J R  
3
Re vi s i on:  
1
Pa ge 3 of  
3
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
L866PB_3 1 X PRINTED CIRCUIT BOARD PCB1  
***************************************************************************  
*********************** Additions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
2
Description  
Designators  
F300 F301  
C3751  
FUSE R452 T750mA  
***************************************************************************  
*********************** Deletions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
2
Description  
Designators  
F300 F301  
C3501  
FUSE R452 T500mA  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
Doc ume nt t i t l e : A85 / A32 I nt e gr a t e d a mpl i f i e r pr e a mp PCB  
Doc ume nt numbe r : L937RS  
Da t e : 28/ 11/ 01  
I s s ue :  
Cr e a t e d by: J Re c kl e s s  
1
Re vi s i on:  
1
ECO numbe r : 01_E014  
Pa ge 1 of 2  
Part  
Qty Iss  
Description  
Designators  
1A022  
1A047  
1
6
RES SM W4 1% 22R 1206  
RES SM W4 1% 47R 1206  
R185  
R108 R109 R133 R134  
R186 R187  
1A110  
1A122  
1A133  
1A147  
1A210  
1
1
2
1
RES SM W4 1% 100R 1206  
RES SM W4 1% 220R 1206  
RES SM W4 1% 330R 1206  
RES SM W4 1% 470R 1206  
RES SM W4 1% 1K0 1206  
R182  
R307  
R300 R304  
R303  
R100 R101 R102 R125  
R126 R127 R156 R157  
R158 R189 R190 R191  
R195 R196  
14  
1A212  
1A222  
1A227  
1A247  
1A256  
1A310  
1A322  
1
4
4
1
2
3
41  
RES SM W4 1% 1K2 1206  
RES SM W4 1% 2K2 1206  
RES SM W4 1% 2K7 1206  
RES SM W4 1% 4K7 1206  
RES SM W4 1% 5K6 1206  
RES SM W4 1% 10K 1206  
RES SM W4 1% 22K 1206  
R302  
R110 R111 R135 R136  
R115 R116 R140 R141  
R203  
R117 R142  
R181 R188 R204  
R112 R113 R114 R118  
R119 R120 R121 R137  
R138 R139 R143 R144  
R145 R146 R147 R148  
R149 R150 R151 R152  
R153 R154 R155 R162  
R163 R164 R165 R166  
R167 R168 R169 R170  
R171 R172 R173 R174  
R175 R176 R177 R178  
R179  
1A410  
16  
RES SM W4 1% 100K 1206  
R103 R104 R105 R128  
R129 R130 R159 R160  
R161 R180 R192 R193  
R194 R197 R198 R199  
R106 R107 R131 R132  
R183 R184  
R122 R123 R124 R200  
R201 R202  
C115 C136 C148 C149  
C158 C159  
1A510  
1A822  
2C022  
6
6
6
RES SM W4 1% 1M0 1206  
RES SM W4 1% 2R2 1206  
MLC 22P 50V NPO 5% SM  
2C110  
2C210  
4
5
MLC 100P 50V NPO 5% SM  
MLC 1N0 50V X7R 10% SM  
C108 C109 C129 C130  
C100 C121 C139 C160  
C164  
2C310  
2C410  
1
39  
MLC 10N 50V X7R 10% SM  
MLC 100N 50V X7R 10% SM  
C119  
C104 C105 C106 C107  
C118 C125 C126 C127  
C128 C143 C144 C145  
C146 C152 C153 C155  
C156 C168 C169 C170  
C171 C172 C173 C174  
C175 C176 C177 C178  
C179 C180 C181 C182  
C183 C184 C185 C186  
C304 C308 C309  
C101 C102 C103 C122  
C123 C124 C140 C141  
C142 C161 C162 C163  
C165 C166  
2D147W  
14  
WIMA FKP2 470P 63V CAP  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
Doc ume nt t i t l e : A85 / A32 I nt e gr a t e d a mpl i f i e r pr e a mp PCB  
Doc ume nt numbe r : L937RS  
Da t e : 28/ 11/ 01  
I s s ue :  
Cr e a t e d by: J Re c kl e s s  
1
Re vi s i on:  
1
ECO numbe r : 01_E014  
Pa ge 2 of 2  
2D210  
2D222W  
2K410  
2K447  
2
2
2
9
PPRO 1N0 5% 63V RA  
C314 C315  
C114 C135  
C147 C167  
C112 C113 C133 C134  
C150 C151 C192 C193  
C307  
WIMA FKP2 2N2 63V CAP  
PEST 100N 63V 10%  
PEST 470N 63V 10%  
2N610  
8
ELST 10U 50V  
C120 C154 C187 C188  
C189 C190 C191 C305  
C110 C131 C157  
C302 C312  
C306  
C300 C310  
2N710  
2N722  
2N747  
2N810C  
2N833  
3
2
1
2
2
ELST 100U 25V  
ELST 220U 16V  
ELST 470U 25V RA  
ELST 1M0 35V  
ELST 3M3 25V  
C303 C313  
2P610CC 6  
ELEC 10U 50V CERAFINE  
C111 C116 C117 C132  
C137 C138  
3AS16W  
3AV99W  
5
DIODE SS SM BAS16W  
DIODE SS SM BAV99W  
D120 D302 D304 D305  
D308  
22  
D100 D101 D102 D103  
D104 D105 D106 D107  
D108 D109 D110 D111  
D112 D113 D114 D115  
D116 D117 D118 D119  
D121 D122  
3BS1D  
3CW315V 2  
4
RECT S1D 1A 200V SM  
D300 D301 D306 D307  
D310 D311  
Q306  
Q100  
Q307  
Q305  
Q301  
Q300 Q303  
Z108  
ZENER 15V OW35 SM SOT23  
TRANS LF SS N SM BC846B  
TRANS LF SS N SM BC849B  
TRANS LF SS P SM BC856B  
TRANS AUDIO DRIVER P 2SA1964  
TRANS AUDIO DRIVER N 2SC5248  
TRANS JFET N J112  
4A846B  
4A849B  
4A856B  
4B1964  
4B5248  
4J112  
1
1
1
1
1
2
1
5A1844  
IC DS1844S-010  
IC AUDIO DIGITAL VOL SM  
IC AUDIO SM DUAL TL072  
Z107  
Z109 Z110 Z111 Z112  
Z113 Z114  
5B2134  
5D317T  
5S408DY 6  
3
1
IC OPAMP DUAL SM OPA2134PA  
IC VREG POS LM317T  
IC 8 TO 1 MUX DG408DY SO16  
Z115 Z116 Z117  
Z301  
Z100 Z101 Z102 Z103  
Z104 Z105  
5S413DY 1  
IC QUAD SPST CMOS SW SO16  
PHONO SKT 4-WAY EMC GOLD  
PHONO SKT 2-WAY EMC GOLD  
MOLEX MINI FIT HCS 4 WAY  
4-WAY AMP CT CONN  
Z106  
SK2 SK3 SK4 SK5  
SK6  
SK300  
SK102  
8D225  
4
1
1
1
1
1
8D226  
8K2304  
8K2404  
8K2408  
8K6604  
8-WAY AMP CT CONN  
4-WAY FR LOCK CONN  
SK103  
SK301  
8K8022B 1  
Connector 22way Molex 52806-2210  
30-WAY FFC VERT CONN SM 1MM  
RELAY DPDT 5V SM NEC EB2-5NU  
FUSE R452 T2A  
SK100  
SK101  
RLY100  
F300 F301  
8K8330  
A216  
1
1
2
C3202  
L937PB_1 1  
PRINTED CIRCUIT BOARD  
PCB1  
SUMMARY OF CHANGES FROM 1.0 TO 1.1  
DELETED:  
C3751  
2
FUSE R452 T750mA  
F300 F301  
F300 F301  
ADDED:  
C3202  
2
FUSE R452 T2A  
ARCAM  
PCB Bill of Materials  
Document title: A85 DISPLAY PCB  
Document number: L865RS Issue:2  
Revision: 0  
ECO number: 01_E028  
Page 1 of 2  
Date: 13/02/02  
Created by: WAF  
Part  
Qty Iss  
Description  
Designators  
1A000  
1A110  
3
7
RES SM W4 2% 0R0  
RES SM W4 1% 100R 1206  
R58 R59 R48  
R51 R52 R53 R64 R65  
R66 R67  
1A115  
1A133  
1A212  
1A215  
1
1
2
10  
RES SM W4 2% 150R  
RES SM W4 2% 330R  
RES SM W4 2% 1K2  
RES SM W4 2% 1K5  
R34  
R33  
R38 R46  
R20 R23 R24 R31 R17  
R18 R19 R21 R22 R25  
R39  
1A222  
1A247  
1A310  
1
2
36  
RES SM W4 2% 2K2  
RES SM W4 2% 4K7  
RES SM W4 2% 10K  
R40 R47  
R49 R50 R56 R57 R73  
R74 R75 R76 R1 R2  
R3 R4 R5 R6 R7 R8  
R9 R10 R11 R12 R13  
R14 R15 R16 R26 R27  
R28 R29 R30 R32 R35  
R36 R37 R45 R55 R68  
R41 R42 R43 R44  
R69 R70 R71 R72  
C31 C32  
1A410  
1A822  
2C010A  
2C018  
2C210  
4
4
2
2
RES SM W4 2% 100K  
RES SM W4 1% 2R2 1206  
MLC 10P 50V NPO 10% SM  
MLC 18P 50V X7R 10% SM  
MLC 1N0 50V X7R 10% SM  
C1 C2  
11  
C39 C40 C41 C42 C43  
C44 C45 C46 C47 C48  
C49  
2C410  
14  
MLC 100N 50V X7R 10% SM  
C3 C4 C5 C6 C7 C8  
C9 C10 C12 C15 C16  
C17 C25 C27  
C11 C14 C26 C28  
C29  
2M610  
2M710  
2N722  
4
1
2
ELST 10U 50V SM  
ELST 100U 25V SM  
ELST 220U 16V  
C33 C34  
2W110X4  
10  
CAP PACK NPO 0612 4X100P 50V 5%  
C50 C51 C52 C53 C54  
C55 C60 C61 C62 C63  
D2 D3 D5  
D4  
LED11  
LED1 LED2 LED3 LED4  
LED5 LED6 LED7 LED8  
LED9 LED10  
3AS16W  
3C5251B  
3D006  
3
1
1
10  
DIODE SS SM BAS16W  
ZENER 22V OW 35 SM SOT23  
LED RED/GREEN 3MM L-93WEGW  
LED GREEN 3.1MM SLR-37MG3F  
3D007  
4A847  
4
1
1
1
1
3
1
TRANS LF SS N SM BC847B  
IC VREG POS 7815  
IC CMOS EPROM 24C02 SM  
IC MICRO RESET DS1233 SM  
H8/3048 128K FLASH MICROCONTROLLER  
IC COMPARATOR SM DUAL LM393A  
DUAL OUTPUT SINGLE SUPPLY AMP AD8532  
Q1 Q2 Q3 Q4  
Z12  
Z5  
Z2  
Z1  
5D7815  
5G2402  
5H1233A  
5H3048  
5M393AD  
5M8532  
Z6 Z7 Z8  
Z11  
X1  
SK2  
SK4  
SK1  
SK3  
SW18  
7X040  
1
1
1
1
1
1
6
XTAL 16MHZ SM GSX49-4  
5-WAY AMP CT CONN  
14 WAY DIL HEADER HORIZ  
FFC 14W 2.54MM HOR PTH  
22-WAY FFC CONN HORIZ 1MM PTH  
EC16B2414  
8K2005  
8K6315  
8K7014A  
8K8022A  
A1211  
A1505  
TACT SWITCH SM SDTM-610-NTR  
SW11 SW12 SW13 SW14  
SW15 SW16  
SW17  
SW1 SW2 SW3 SW4 SW5  
SW6 SW7 SW8 SW9 SW10  
A1506  
A1509  
1
10  
TACT SWITCH BOURNS SDTX-644  
TACT SWITCH SM SDTM-620-NTR  
ARCAM  
PCB Bill of Materials  
Document title: A85 DISPLAY PCB  
Document number: L865RS Issue:2  
Revision: 0  
ECO number: 01_E028  
Page 2 of 2  
Date: 13/02/02  
Created by: WAF  
B1013  
B2107  
E916PM  
F163  
1
1
2
2
1
MN12818A VFD ITRON  
REMOTE RX PIC-26043TM2 38KHZ  
DISPLAY CRADLE E916PM  
DISP1  
RX1  
DC1 DC2  
SP1 SP2  
PCB1  
STICKY PAD S/A 10 X 15mm  
X PRINTED CIRCUIT BOARD  
L865PB_2  
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
L865PB_2 X PRINTED CIRCUIT BOARD PCB1  
1
***************************************************************************  
*********************** Additions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
B2107  
E916PM  
L865PB_2  
1
2
1
REMOTE RX PIC-26043TM2 38KHZ  
DISPLAY CRADLE E916PM  
X PRINTED CIRCUIT BOARD  
RX1  
DC1 DC2  
PCB1  
***************************************************************************  
*********************** Deletions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
1
Description  
Designators  
B2103  
REMOTE RX SBX1610-52 38KHZ  
RX1  
L865PB_1  
1
X PRINTED CIRCUIT BOARD  
PCB1  
TITLE A85 PHONO PCB  
DWG. No. L870RS  
DRAWN BY JAG  
ISSUE 2.0 ECO No 01_1070  
RUN-OUT SHEET  
DATE 17-4-01  
SHEET 1 of 1  
Part  
Qty Iss  
Description  
Designators  
1H010  
1H022  
2
8
RES MF W4 1% 10R  
RES MF W4 1% 22R  
R123 R223  
R118 R119 R120 R121  
R218 R219 R220 R221  
R101 R102 R104 R105  
R106 R201 R202 R204  
R205 R206  
1H110  
10  
RES MF W4 1% 100R  
1H133  
1H256  
1H312  
1H315  
1H339  
1H347  
1H356  
1H410  
2
2
4
2
2
2
2
6
RES MF W4 1% 330R  
RES MF W4 1% 5K6  
RES MF W4 1% 12K  
RES MF W4 1% 15K  
RES MF W4 1% 39K  
RES MF W4 1% 47K  
RES MF W4 1% 56K  
RES MF W4 1% 100K  
R100 R200  
R124 R224  
R109 R110 R209 R210  
R115 R215  
R122 R222  
R108 R208  
R111 R211  
R112 R113 R114 R212  
R213 R214  
1H522  
2A410  
2D110N  
2D110W  
2D147W  
4
1
2
2
6
RES MF W4 1% 2M2  
R116 R117 R216 R217  
C1  
C119 C219  
C109 C209  
C108 C116 C117 C208  
C216 C217  
CERD 100N 63V -20% +80% RA  
PPRO 100P 63V 5% RA  
PPRO W 100P 63V 5% RA  
PPRO W 470P 63V 5% RA  
2D210  
2D213N  
2D247N  
2D310  
2K410  
4
2
2
4
8
PPRO 1N0 5% 63V RA  
PPRO 1N3 63V 5% RA  
PPRO 4N7 63V 5% RA  
PPRO 10N 63V 1% AXIAL  
PEST 100N 63V 10%  
C101 C120 C201 C220  
C115 C215  
C110 C210  
C111 C112 C211 C212  
C104 C105 C106 C107  
C204 C205 C206 C207  
C113 C213  
2K510  
2N622  
2
2
CAP MKS2 1U0 16V 10%  
ELST 22U 63V  
C100 C200  
2P710AS 4  
ELEC 100U 25V SILMIC  
ELST NON POLAR 10UF 35V  
SSDIODE 1N4148 75V  
C102 C103 C202 C203  
C118 C218  
D100 D101 D102 D200  
D201 D202  
2U610  
2
6
3A4148  
4A1085  
4A546  
4
TRANS LF SS P 2SA1085  
TRANS LF SS N BC546B  
TR106 TR107 TR206  
TR207  
TR108 TR109 TR110  
TR111 TR112 TR113  
TR114 TR208 TR209  
TR210 TR211 TR212  
TR213 TR214  
14  
4A556  
12  
TRANS LF SS P BC556B  
TR100 TR101 TR102  
TR103 TR104 TR105  
TR200 TR201 TR202  
TR203 TR204 TR205  
IC100 IC200  
SK1  
SK2  
5B071  
8D230  
8K2408  
A1013  
2
1
1
1
IC FET OPAMP TL071  
PHONO SKT 2-WAY HOR EMC GOLD  
8-WAY AMP CT CONN  
SW PUSH 4PCO  
SW100  
L870PB_2 1  
X PRINTED CIRCUIT BOARD  
PCB1  
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
TITLE A85 PHONO PCB  
DWG. No. L870RS  
DRAWN BY JAG  
ISSUE 2.0 ECO No 01_1070  
RUN-OUT SHEET  
DATE 17-4-01  
SHEET 2 of 1  
L870PB_2 1  
X PRINTED CIRCUIT BOARD  
PCB1  
***************************************************************************  
*********************** Additions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
2D210  
L870PB_2 1  
2
PPRO 1N0 5% 63V RA  
X PRINTED CIRCUIT BOARD  
C120 C220  
PCB1  
***************************************************************************  
*********************** Deletions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
2D147W  
L870PB_1 1  
2
PPRO W 470P 63V 5% RA  
X PRINTED CIRCUIT BOARD  
C114 C214  
PCB1  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101  
Doc ume nt t i t l e : P85 THI RD CHANNEL  
Doc ume nt numbe r : L911RS  
Da t e : 06/ 06/ 01  
I s s ue :  
Cr e a t e d by: J R  
1
Re vi s i on:  
1
Pa ge 1 of  
2
Part  
Qty Iss  
Description  
Designators  
1A000  
1A022  
1A110  
2
4
13  
RES SM W4 1% 0R0 1206  
RES SM W4 1% 22R 1206  
RES SM W4 1% 100R 1206  
R345 R346  
R321 R322 R323 R337  
R105 R106 R315 R316  
R317 R318 R319 R320  
R343 R344 R347 R348  
R349  
1A115  
1A122  
1A133  
1A210  
2
2
2
7
RES SM W4 1% 150R 1206  
RES SM W4 1% 220R 1206  
RES SM W4 1% 330R 1206  
RES SM W4 1% 1K0 1206  
R338 R339  
R103 R104  
R341 R342  
R100 R101 R102 R324  
R325 R326 R354  
R331  
R332  
R333 R335  
R310 R328 R329  
R355  
R300 R301 R302 R303  
R304 R305 R306 R307  
R309 R311 R312 R313  
R314  
1A215  
1A218  
1A233  
1A247  
1A268  
1A310  
1
1
2
3
1
13  
RES SM W4 1% 1K5 1206  
RES SM W4 1% 1K8 1206  
RES SM W4 1% 3K3 1206  
RES SM W4 1% 4K7 1206  
RES SM W4 1% 6K8 1206  
RES SM W4 1% 10K 1206  
1A322  
1A410  
1A510  
1A822  
1C856  
1J147  
1T002  
2C110  
2C210  
2C310  
2C410  
4
1
1
1
2
2
1
2
1
3
7
RES SM W4 1% 22K 1206  
RES SM W4 1% 100K 1206  
RES SM W4 1% 1M0 1206  
RES SM W4 1% 2R2 1206  
RES CF 2W 5R6 5%  
R308 R327 R334 R336  
R340  
R330  
R107  
R350 R351  
R352 R353  
TH100  
C307 C308  
C105  
C103 C104 C312  
C100 C101 C309 C310  
C313 C314 C315  
C316  
C108 C109 C311  
C319  
C317  
C305 C318  
C102 C300 C301 C303  
C304  
RES 2W MF 5% 470R  
THERMISTOR SIEMENS B59008  
MLC 100P 50V NPO 5% SM  
MLC 1N0 50V X7R 10% SM  
MLC 10N 50V X7R 10% SM  
MLC 100N 50V X7R 10% SM  
2D147W  
2H410  
2K410  
2K447  
2N610  
2N710  
1
3
1
1
2
5
PPRO W 470P 63V 5% RA  
PCRB 100N 100V 10% RA 5mm  
PEST 100N 63V 10%  
PEST 470N 63V 10%  
ELST 10U 50V  
ELST 100U 25V  
2N710B  
2N910A  
2V710  
3AS16W  
3B4003  
3BGBU8D 1  
3CW315V 2  
3CW34V7 4  
2
2
1
3
4
ELST 100U 100V  
C302 C306  
C106 C107  
C320  
D300 D301 D302  
D100 D101 D303 D304  
BR100  
DZ300 DZ301  
DZ302 DZ303 DZ305  
DZ306  
ELST 10m 63V RA 35mm  
ELST NON POLAR 100UF 16V  
DIODE SS SM BAS16W  
RECTIFIER 1N4003F 1A 200V  
BRIDGE RECTIFIER 8A 200V  
ZENER 15V OW35 SM SOT23  
ZENER 4V7 OW 35 SM SOT23  
4AFMMT497 11  
TRANS LF SS N SM FMMT497  
TR309 TR310 TR311  
TR312 TR313 TR314  
TR315 TR316 TR317  
TR320 TR322  
TR300 TR301 TR302  
TR303 TR304 TR305  
TR306 TR307 TR308  
TR321  
4AFMMT597 10  
TRANS LF SS P SM FMMT597  
ARCAM  
PCB Bi l l of Ma t e r i a l s  
ECO numbe r : 01_1101  
Doc ume nt t i t l e : P85 THI RD CHANNEL  
Doc ume nt numbe r : L911RS  
Da t e : 06/ 06/ 01  
I s s ue :  
Cr e a t e d by: J R  
1
Re vi s i on:  
1
Pa ge 2 of  
2
4B179  
4CSAP15N 1  
4CSAP15P 1  
2
NPN TRANS MP BD179  
TR100 TR101  
TR318  
TR319  
TRANS POWER NPN SAP15N  
TRANS POWER PNP SAP15P  
IC AUDIO SM DUAL TL072  
5B072D  
1
IC300  
5J7414D 1  
SURFACE MOUNT HEX SCHMITT TRIGGER  
IC100  
6F110  
7D002C  
8D226  
8D418G  
8K2304  
8K6201  
8K7014  
A213  
1
1
1
1
1
1
1
2
PRES 100R LIN HORIZ  
INDUCT 2U2 12x20mm  
RV300  
L300  
SK101  
SK102  
SK103  
PL300  
SK100  
RLY100 RLY101  
PHONO SKT 2-WAY EMC GOLD  
CAMCON BINDING POST 4WAY GOLD  
MOLEX MINI FIT 4 WAY  
2WAY MOLEX VERT MALE CONNECTOR  
FFC 14W 2.54MM VER PTH  
RLY SPST 24V SPKR  
L911PB_1 1  
X PCB  
PB  
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
L911PB_1 1 X PCB PB  
***************************************************************************  
*********************** Additions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
1A310  
1A322  
1
1
RES SM W4 1% 10K 1206  
RES SM W4 1% 22K 1206  
R314  
R308  
***************************************************************************  
*********************** Deletions Since Last Issue ************************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
1A247  
1A310  
1
1
RES SM W4 1% 4K7 1206  
RES SM W4 1% 10K 1206  
R314  
R308  
TITLE P85 SWITCH BOARD  
DWG. No. L910PB  
DRAWN BY CL  
ISSUE 1.0 ECO No 00_1099  
RUN-OUT SHEET  
DATE 29/09/00  
SHEET 1 of 2  
part  
Qty Iss  
Description  
Designators  
******** PCB Finish items:  
******** (For drawing office use only. Will be  
******** kitted from mechanical run-out sheet.)  
5B483028 1  
IC CMOS MICRO HT48R30 28-DIP-B-0  
Z1  
******** PCB Build items:  
1H118  
1H133  
1H147  
1H156  
1H310  
1
1
3
2
RES MF W4 1% 180R  
RES MF W4 1% 330R  
RES MF W4 1% 470R  
RES MF W4 1% 560R  
RES MF W4 1% 10K  
R15  
R14  
R19 R20 R21  
R12 R13  
R1 R2 R3 R4 R5 R6  
R7 R8 R9 R10 R11  
R17 R18  
R16  
C1 C2 C3 C4 C9 C10  
C11 C12 C13  
C5  
C6 C7 C8 C14  
D1 D2  
LED3  
LED1 LED2  
Q5 Q6 Q7  
Q1 Q2 Q3 Q4  
Z2  
13  
1H410  
2A410  
1
9
RES MF W4 1% 100K  
CERD 100N 63V -20% +80% RA  
2N610  
2N710  
3A4148  
3D006  
3D007  
4A546  
4A556  
5J7432  
7W005  
1
4
2
1
2
3
4
1
1
ELST 10U 50V  
ELST 100U 25V  
SSDIODE 1N4148 75V  
LED RED/GREEN 3MM L-93WEGW  
LED GREEN 3.1MM SLR-37MG3F  
TRANS LF SS N BC546B  
TRANS LF SS P BC556B  
HCMOS 74HC32  
CER RESON 4.00MHz  
X1  
8K7014A 2  
FFC 14W 2.54MM HOR PTH  
IC SOCKET 28 NARROW  
A TACT SWITCH SKHVPE  
TACT SWITCH BOURNS SDTX-644  
X PRINTED CIRCUIT BOARD  
SK1 SK2  
Z1  
SW1 SW2  
SW3  
8S028N  
A1503  
A1506  
1
2
1
L910PB_1 1  
PCB  
******** Prototype or pre-production parts used:  
A1503 A TACT SWITCH SKHVPE  
2
SW1 SW2  
******** Obsolete, absent, redundant, or incorrect issue in PDM:  
L910PB_1 1 X PRINTED CIRCUIT BOARD PCB  
***************************************************************************  
********************* Additions Since L910RS Issue C **********************  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
A1503  
L910PB_1 1  
2
A TACT SWITCH SKHVPE  
X PRINTED CIRCUIT BOARD  
SW1 SW2  
PCB  
***************************************************************************  
********************* Deletions Since L910RS Issue C **********************  
TITLE P85 SWITCH BOARD  
DWG. No. L910PB  
DRAWN BY CL  
ISSUE 1.0 ECO No 00_1099  
RUN-OUT SHEET  
DATE 29/09/00  
SHEET 2 of 2  
***************************************************************************  
Part  
Qty Iss  
Description  
Designators  
A1504  
L910PB_C 1  
2
TACT SWITCH 2-PIN LOW PROF  
PRINTED CIRCUIT BOARD  
SW1 SW2  
PCB  
A85 General Assembly Parts List  
ITEM  
A
B
230V  
L813RC  
115V  
100V  
SILVER  
SILVER  
BLACK  
BLACK  
DESCRIPTION  
REMOTE CONTROL  
TRANSF A85 100V  
WHERE USED  
QTY  
QTY  
1
1
L907TX  
REPLACE 7A9301 AT TX200  
TRANSFORMER FITTED ON  
PCB L865AY  
WHERE USED  
FUSE & SPARE FUSE HOLDER  
ITEM  
240V  
C12406  
E804HK  
E804MI  
115V  
C12406  
100V  
TBA  
DESCRIPTION  
T4AL FUSE  
HEAT-SINK  
MAINS INSULATOR  
2
1
1
ON TOP OF CHASSIS UNDER TX  
SPACER  
E821CH  
E83001  
E032AY  
E912MC  
E850MC  
E853MC  
E858PM  
E859MC  
E860MC  
E866MC  
E869PM  
E879PM  
E879SL  
E907MC  
E920MC  
F022  
F037  
F038  
F062  
F065  
F082  
F162  
F164  
CHASSIS  
TX GASKET  
REAR PANEL  
85 AMP TRANSISTOR CLAMP  
HEAT SHUNT  
2000 A85 PRE-AMP REG CLAMP  
LARGE VOLUME KNOB  
PHONO BLANKING PLATE  
MODULE BLANK  
A85 TOROIDAL SHIELD  
TACT BUTTON POWER  
FOOT  
1
1
1
4
1
1
1
1
1
1
1
6
1
1
1
2
1
1
1
1
3
UNDER TX  
ON HEAT-SINK E804HK  
BETWEEN TOROID TX & CHS  
CONFIGURATION LABEL  
KOOL PAD  
CHASSIS  
HEAT-SINK  
HEAT SINK  
FOR FUSE HOLDERS  
FOR TX  
ON TOP OF TX  
FOR SPARE FUSE  
FOR TX SCREEN WIRE  
UNDER VOLTAGE REG  
ON TOP OF HEAT SINK  
COVER TO FP  
HEAT SINK CLAMP  
FUSE HOLDER COVER  
TOROID CLAMP 90MM DIA.  
RUBBER WASHER  
FUSE CLIP  
ADHESIVE CABLE CLIP  
TO220 SIL PAD  
TAPE 50m ROLL  
0.003  
400M  
M
DAMPING PAD  
HA3A16A  
HA3V10A  
HA3V06A  
HA4A12B  
HA5L20B  
HA5K70B  
HA6K45A  
M3 x 16mm SCREW  
MC TORX M3X10 STZP  
M3 x 6mm SCREW  
M4 x 12mm SCREW  
M5 x 20mm HEX HEAD BOLT BLACK  
M5 x 70mm BOLT  
HEATSHUNT  
2
14  
11  
2
4
3
MOTHER PCB & SUB-FRONT  
RR PAN ‘E’ EARTH  
CLAMP E912MC TO E804HK  
HEATSINK SCREWS  
TX FXG  
M6 x 45mm BOLT  
1
A85 General Assembly Parts List  
ITEM  
230V  
HA6K60A  
HF4V09B  
HJ4A00A  
HJ4C00D  
HL4SA  
HL4SB  
HL5EB  
HP008  
K5408  
115V  
100V  
SILVER  
BLACK  
DESCRIPTION  
WHERE USED  
REAR & MODULES  
RR PAN ‘E’ EARTH  
RR PAN ‘E’ EARTH  
QTY  
TRANSBOLT  
1
No. 4 x 9mm SCREW  
17  
1
1
3
1
3
4
1
1
1
M4 NUT  
M4 WAISTED NUT  
WASHER  
M4 SHAKE PROOF  
M5 WASHER BLACK  
RR PAN ‘E’ EARTH  
HEATSINK WASHER CTRE  
BLANKING PLATES  
SNAP RIVET BLACK PLASTIC (3000)  
SLEEVE FOR LIGHT PIPES (6mm)  
A85 DISPLAY PCB ASSEMBLY  
A85 PRE AMP PCB ASSEMBLY  
PREVIOUS BOARD FITTED L866AY  
A85 PCB ASSEMBLY  
L865AY  
L937AY  
L882AY  
L882TX  
L914CA  
L915CA  
L916CA  
L917CA  
L894AY  
L879TX  
1
1
1
1
1
1
1
1
4
1
L882TX  
A85 TRANSFORMER  
TX  
DISP - PRE CABLE ASSEMBLY  
DISP - PWR CABLE ASSEMBLY  
PWR - HEADPHONE CABLE ASSEMBLY  
PWR - PRE CABLE ASSEMBLY  
COVER PLATE  
E834CP  
E973AY  
HA4V06S  
E833CP  
E980AY  
HA4V06B  
FASCIA ASSEMBLY  
M4 X 6mm SCREW  
COVER TO CHS  
COVER VOL SEL SW HOLE  
E802SL  
100V LABEL  
P85 General Assembly  
ITEM  
230V  
5B483028  
8K004  
115V  
100V  
SILVER  
BLACK  
DESCRIPTION  
HOLTEK PLUS L819SW  
JUMPER SOCKET 0.1" M7571-05  
CONNECTOR 14MM SHORTING BAR  
P2148  
WHERE USED  
Z1 of L910AY  
QTY  
1
2
1
8K006  
C12406  
E031AY  
E804HK  
E804MI  
C12406  
TBA  
FUSE T4AT  
REAR PANEL ASSEMBLY  
HEAT-SINK  
FUSE & SPARE FUSE HOLDER  
2
1
1
1
MAINS INSULATOR  
ON TOP OF CHASSIS UNDER TX  
SPACER  
E821CH  
E823AP  
E83001  
E861MC  
E866MC  
E869PM  
E879PM  
E879SL  
E907MC  
E912MC  
E916SL  
E920MC  
F022  
CHASSIS  
TX MASK  
TX GASKET  
1
1
1
1
1
1
6
1
1
4
2
1
2
1
2
1
On Top of TX  
UNDER TX  
RAER PANEL  
BETWEEN TOROID TX & CHS  
P85 3RD CHANEL BLANKING PLATE  
A85 TOROIDAL SHIELD  
TACT BUTTON POWER  
FOOT  
CONFIGURATION LABEL  
KOOL PAD  
85 AMP TRANSISTOR CLAMP  
FUSE LABEL  
HEATSINK CLAMP  
FUSE HOLDER COVER  
TOROID CLAMP  
CHASSIS  
HEAT SINK  
FOR HEAT-SINKS  
E916SL  
E917SL  
HEAT SINK  
FOR FUSE HOLDERS  
FOR TX  
F037  
F038  
F065  
F162  
RUBBER WASHER  
ADHESIVE CABLE CLIP  
TAPE 50m ROLL  
ON TOP OF TX  
FOR TX SCREEN WIRE  
ON TOP OF HEAT SINK  
COVER TO FP  
0.003  
400MM  
F164  
DAMPING PAD  
F200  
HOLE BLANKING GROMMET  
M3 x 10mm SCREW  
MC TORX M3X6 STZP  
M4 x 12mm SCREW  
M5 x 70mm BOLT  
FOR REAR PANEL ‘LINK PARKING'  
MOTHER PCB & SUB-FRONT  
2
9
4
1
3
4
HA3V10A  
HA 3V06A  
HA4A12B  
HA5K70B  
HA5L20B  
RR PAN ‘E' EARTH  
HEATSINK SCREWS  
CLAMPING OF E912MC TO E804HK  
M5 x 20MM HEX HEAD BOLT BLACK  
ST'L  
HA6K60A  
HF4V09B  
HJ4A00A  
HL4SA  
HL5EB  
K5408  
M6 x 60mm BOLT  
No. 4 x 9mm SCREW  
M4 NUT  
M4 SHAKE PROOF  
M5 WASHER BLACK  
SLEEVE FOR LIGHT PIPES (6mm)  
POWER SUPPLY & AMP PCB  
TX FXG  
REAR  
EARTH  
CHASSIS EARTH  
HEAT-SINK WASHER CTRE  
1
16  
1
2
3
1
1
L882AY  
P85 General Assembly  
ITEM  
230V  
L884TX  
L910AY  
L915CA  
115V  
L884TX  
100V  
L880TX  
SILVER  
BLACK  
DESCRIPTION  
A85P TRANSFORMER  
SWITCH PCB  
CABLE FFC 0.1" 14WAY A85 DISP - PWR  
COVER PLATE  
FACIA ASSY  
WHERE USED  
QTY  
1
1
1
1
1
4
E834CP  
E974AY  
HA4V06S  
E833CP  
E990AY  
HA4V06B  
M4 X 6mm SCREW  
P85/3 General Assembly  
ITEM  
230V  
5B483028  
8K004  
115V  
100V  
SILVER  
BLACK  
DESCRIPTION  
PIC CHIP + L819SW  
WHERE USED  
QTY  
1
2
1
2 WAY JUMPER SKT  
8K006  
CONNECTOR 14MM SNORTING BAR  
P2148  
C12406  
E031AY  
E804HK  
E804MI  
C12406  
TBA  
FUSE 20MM 4AT  
REAR PANEL ASSEMBLY  
HEAT-SINK  
FUSE & SPARE FUSE HOLDER  
2
1
1
1
MAINS INSULATOR  
ON TOP OF CHASSIS UNDER TX  
SPACER  
E806HK  
E821CH  
E823AP  
E83001  
E866MC  
E869PM  
E879PM  
E879SL  
E907MC  
E909MC  
E912MC  
E921MC  
E922SL  
F022  
P85 3RD CHANNEL HEAT-SINK  
CHASSIS  
1
1
1
1
1
1
6
1
1
1
6
1
2
2
1
2
1
1
P85 TX MASK  
TX GASKET  
UNDER TX  
TORODIAL SAFETY SHEILD  
TACT BUTTON POWER  
FOOT  
UNDER TX & WASHER  
CONFIGURATION LABEL  
KOOL PAD  
P85 3RD CHANNEL SIL PAO  
85 AMP TRANSISTOR CLAMP  
HEATSINK CLAMP  
CHASSIS  
HEAT SINK  
FOR HEAT-SINKS E804HK & E806HK  
HEAT SINK  
P85 3RD CHANEL FUSE LABEL  
FUSE HOLDER COVER  
TOROID CLAMP  
FOR FUSE HOLDERS  
FOR TX  
F037  
F038  
RUBBER WASHER  
ADHESIVE CABLE CLIP  
ADHESIVE CABLE CLIP  
TAPE 50m ROLL  
ON TOP OF TX  
F065  
FOR TX SCREEN WIRE  
FOR TX SCREEN WIRE  
ON TOP OF HEAT SINK  
COVER TO FP  
F065  
F162  
0.003  
F164  
DAMPING PAD  
400MM  
F200  
HOLE BLANKING GROMMET  
M3 x 10mm SCREW  
MC TORX P/H M3X6 STZP  
M4 x12mm SCREW  
M5 x 70mm BOLT  
FOR REAR PANEL  
MOTHER PCB & SUB-FRONT  
2
22  
4
HA3V10A  
HA3V06A  
HA4A12B  
HA5K70B  
HEATSINK SCREWS  
5
P85/3 General Assembly  
ITEM  
230V  
115V  
100V  
SILVER  
BLACK  
DESCRIPTION  
WHERE USED  
QTY  
HA5L20B  
M5 x 20MM HEX HEAD BOLT BLACK  
ST=L  
CLAMP E912MC TO E804HK /  
E806HK  
6
1
HA6K60A  
HF4V09B  
HJ4A00A  
HL4SA  
M6 x 60mm BOLT  
TX FXG  
No. 4 x 9mm SCREW  
M4 NUT  
REAR  
20  
1
2
5
1
1
1
1
1
1
1
FOR HEAT SINK  
CHASSIS EARTH  
HEAT-SINK WASHER CTRE  
M4 SHAKE PROOF  
HL5EB  
M5 WASHER BLACK  
SLEEVE FOR LIGHT PIPES (6mm)  
POWER SUPPLY & AMP PCB  
A85 TRANSFORMER  
SWITCH PCB  
K5408  
L882AY  
L884TX  
L910AY  
L911AY  
L915CA  
L919CA  
L884TX  
L880TX  
TX  
A85 3RD CHANNEL  
CABLE FFC 0.1" 14WAY A85 DISP - PWR  
CABLE FFC 0.1" 14WAY A85 3RD  
CHANNEL  
E832CP  
E974AY  
HA4V06S  
E831CP  
E990AY  
HA4V06B  
COVER PLATE  
FACIA ASSY  
1
1
4
M4 X 6mm SCREW  
COVER SIDE  

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