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Cambridge Audio 640A Service Manual

Cambridge Audio 640A
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Cambridge Azur Front Panel PCB BOM
AP PART
No.
DRAWING NO DESCRIPTION QTY DESIGNATOR COMMENTS
CONTROL PCB ASSEMBLY (FRONT PANEL)
AP12712/8b CONTROL PCB SNAP OFF (FRONT PANEL) 1
220R 0.25W 1% METAL FILM RESISTOR 2 R1
820R 0.25W 1% METAL FILM RESISTOR 2 R3,R6,R7 R33
10k 0.25W 1% METAL FILM RESISTOR 6 R2, R4,R5, R27, R28, R29,
R35
33k 0.25W 1% METAL FILM RESISTOR 1 R30
100n CERAMIC 50/100V 5mm PITCH CAPACITOR 5 C4, C21, C22, C23, C24
47u 16V ELECTROLYTIC CAPACITOR 1 C3
4MHz CRYSTAL RESONATOR WITH BUILT IN CAPS
(3 TERMINAL)
1 CRS1
PY597 PIC16C57C -04P MICROPROCESSOR IC 1 U5 TO BE PROGRAMMED WITH
AP13424/1 HEX CODE
28 PIN 0.6" TURNED PIN SOCKET FOR ABOVE PIC 1 (U5)
PY260 BA6218 MOTOR DRIVE IC 1 U6
PY524 74HC4094 SHIFT REGISTER IC 1 U7
PY214 BC337 NPN TRANSISTOR 1 Q2
1N4148 SIGNAL DIODE 1 D1
PY064 FLAT TOP BLUE LEDS (AS PER CURRENT
CAMBRIDGE)
6 D2, D3, D4, D5, D6, D7
3mm STANDARD DIFFUSED RED LED 1 D8 TO BE FITTED TO CABLE AS PER
DRAWING AP13388/3 AND THEN
GLUED INTO THE 'PROTECTION'
LIGHT GUIDE FITTED TO THE SUB
PANEL
2 WAY JST CONNECTOR 2.54mm PITCH 90 DEGREE
MOUNTED
1 CN7
4 WAY JST CONNECTOR 2.54mm PITCH 90 DEGREE
MOUNTED
1 CN1
8 WAY JST CONNECTOR 2.54mm PITCH 90 DEGREE
MOUNTED
1 CN2
9 WAY JST CONNECTOR 2.54mm PITCH 90 DEGREE
MOUNTED
1 CN6
TACTILE SWITCH 1 SW3
LINK WIRE 24SWG 20mm LONG 7 LK1, LK3, LK5, LK8, LK9,
X, X,
CONTROL PCB ASSEMBLY (POWER SWITCH)
AP12712/8c CONTROL PCB SNAPOFF (POWER SWITCH) 1 FASTENEND IN PLACE TO
STANDOFFS SUPPLIED ON SUB
PLATE.
TACTILE SWITCH 6 SW4, SW5, SW6, SW7,
SW9, SW10
AS PER CAMBRIDGE D500SE
PY064 FLAT TOP BLUE LEDS (AS PER CURRENT
CAMBRIDGE)
1D9
CONTROL PCB ASSEMBLY (I/R RECEIVER)
AP12712/8d CONTROL PCB SNAPOFF (IR RECEIVER) 1 FIXED INTO PEENED HOLE ON
SUBPLATE
PD092 TSOP18 IR RECEIVER MODULE (VISHAY) 1 U9
100n CERAMIC 50/100V 5mm PITCH CAPACITOR 1 C1 TO BE MOUNTED ON BACK OF PCB
M3 X 6 POZI PAN TAPTITE SCREW 1 FOR FIXING IR SNAP OFF PCB TO SUB
PANEL
1mm NYLON WASHER 1 USED AS A SPACER FOR AP12711/5d
16

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Cambridge Audio 640A Specifications

General IconGeneral
BrandCambridge Audio
Model640A
CategoryAmplifier
LanguageEnglish

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