Philips CD950 - Fault Finding Guide

FAULT FINDING GUIDE
POWER SUPPLY CHECK:
FUSES
MAINSTRANSEORMER
VOLTAGES: AC DC FTD
SAFETY RESISTORS
DISPLAY CHECK: COMMUNICATION uP - FID
WIRING
DISPLAY DRIVER
MICROPROCESSOR 7701
REMOVE DISC
PRESS PLAY
: WIRING TO CONTROL + DISPLAY PANEL
TO C.D.M. MECHANISM
> POWER SUPPLY
COMMUNICATION CONTR + DISPL PANEL
~ MICROPROCESSOR 7701
LASER SUPPLY TESTPOINTS 9-11
SERVICE MODE 0 - 1
1.C. 7001 (TDA8808)
OPAMP 7003 (TCA03?2)
FLEX, SOLDER POINTS, C.D.M.
3002, R3003
SERVICE MODE 1
1.C, 7002 (TDA8809)
N OPAMP 7003 (TCA0372: HOT!)
FLEX, SOLDER POINTS, C.D.M.
R3065, 3066
SERVICE MODE 2-3
TORNT. NW
MOTOR
2
¥
y
siaegoe
re
708
PRESS
PLAY
FRanstotons
R3140, 3141,
1.C. 7001 (10A8808)
WIRING
LASER SUPPLY
5 CURRENT TESTPOINTS 1-2
Oy CHECK; 1.C, 7100 (SAA7310)
CEaB NN, CHECK: 1.C. 7100 (PINS 4,3,2 3P 71, 72,73)
ee POWER SUPPLY (SAFETY RESISTOR 3102)
Y
y
CHECK: COMMUNICATION uP 7731 - IC 7201
WCKO TP 85, 86,87, 88
BcKO S\N D SHIPTREGISTERS 7202-7203
DOL PORTS 7204
DOR IC 7201 (SM5840A)
4 RESISTOR 3201
CHECK: IC 7250 (SAA7350)
SAFETY RESISTOR 3250
CLOCK SIGNAL TP 102
0 303, 3304
319
CHECK: SAFETY RESISTORS: 3300, 3302,3
3305, 3318, 3
1.C. 7300
CLOCK SIGNAL TESTPOINT 102
CHECK: SAFETY RESISTORS: 3342, 3343, 3328, 3329
1c. 7302, 7303
KILL CIRCUIT: 7304, 7305, 7306, 7307
DIGITAL MUTE: 2308, 7309, 7310, 7311
7314, 7315
to] CHECK: POWER SUPPLY
1.C, 7250, 7300, 7302, 7303
Y
y
:
N
y
Y
N
pn t>| SEE SPECIFICATIONS MEASUREMENT
?
X
POWER ON
LOAD DISC
PRESS PLAY
t
TOC
ON
DISPLAY,
7
Y
y
PRESS PLAY
3 ¥
P< PHONE
?
ia :
Y?
ry
INTERM.
Zs FAILURE
: PIN 21 uP 7703
OPAMP 7
600
TRAY MECHANISM
WIRING
: SAFETY RESISTORS 3390, 3391
OPAMP 7380
KILL CIRCUIT 7312, Typha PANEL)
7382
POTM 3381, JACKBUS BU-S
WIRING
CHECK: COMMUNICATION uP 7731 - EEPROM 775)
CHECK: COMMUNICATION uP 7731 - IC 7202
a
~
Psy S =
CHECK: I.R. RECEIVER 1451
POWER SUPP. (SAFETY RESISTOR 3420)
WIRING
SK-2
CHECK: SAFETY RESISTOR 3211
1.C. 7212, 7213
TRANSFORMER $211
CHECK: SAFETY RESISTOR 3217
BU-6 (PLT 102)
T.C. 7213
GO TO SERVICE MODE 0,1.2 OR 3
PRESS PLAY
ERROR CODES ARE DISPLAYED
HAS1049
9212