Philips CD911 - Fault Finding Guide

20
FAULTFINDING GUIDE
PCS 60 765
‘AUDIO O
POWER SUPPLY CHECK: FUSES
MAINSTRANSFORMER Y
VOLTAGES: AC DC FTD
SAFETY RESISTORS N
DISPLAY CHECK: COMMUNICATION uP - FTD
WIRING
DISPLAY DRIVER Y
MICROPROCESSOR 7700 V
OPEN TRAY [=
LOAD DISC
PRESS PLAY
y
TO
SEE FAULTFINDING GUIDE OF COM-12 N ON
DISPLAY,
7.
Y
7,
PRESS PLAY
0
:
¥
HEAD-
- PHONE
?
SAFETY RESISTORS 3113,3115
1.C.7100 (SAA7345)
CHECK: POWER SUPPLY
SAFETY RESISTORS 3330,3331,3332
10.7300 (TDA1549)
POWER SUPPLY
SAFETY RESISTORS 3333,3334
OPAMP 7301
TESTPOINT 95,96 Y
KILL CIRCUIT ON POWER SUPPLY
TRANSISTOR 7560 a
KILLI ON PIN 16 OF 1.C.7700
TESTPOINT 89,90
KILL, KILLR ON PIN 27, 26 OF |.C.7100
TRANSISTORS 7360,7361,7362,7363
CHECK: 1.C.7300 (TDA1549)
SEE SPECIFICATIONS MEASUREMENT
PIN 12 uP 7700
OPAMP 7600A
> TRAY MECHANISM
WIRING
CHECK: OPAMP 7370
KILL CIRCUIT 7364, 7365
POTM 3370,JACKBUS 1371
WIRING
CHECK: |.R. RECEIVER 1040
PIN 37 OF IC. 7700
CHECK: TESTPOINT 81
PIN 2 OF I.C. 7100
TRANFORMER 5250
GO TO SERVICE MODE
PRESS PLAY
ERROR MESSAGES
HAS1129
9402