Philips CD692 - Faultfinding Guide; Troubleshooting Flowchart

36
FAULTFINDING GUIDE
POWER ON
POWER SCPPLY CHECK: FUSES y
MAINSTRANSFORMER
VOLTAGES: AC DC FID
SAFETY RESISTORS N
DISPLAY CHECK: COMMUNICATION uP - PTD
WIRING
DISPLAY DRIVER 4
MICROPROCESSOR
7700
'
:
PIN
12
up
7700
5 OPAMP 76608
= o SAFETY RESISTORS 3615-3616
TRAY MECHANISM
WIRING
Y
LOAD DISC
PRESS PLAY
¢
70C
i oN
DISPLAY,
?
Y
CHECK: WIRING TO CONTROL + DISPLAY PANEL
TO C.D.M. MECHANISM
POWER SUPPLY
COMMUNICATION CONTR + DISPL PANEL
= MICROPROCESSOR 7700
Y
V ¥
Gsa\, E=ta
LIGHT
?
f
Y
4
CHECK: 1.¢. 7002 (TDA8B08) i
‘ CPAMP 7003 (B)
FLEX, SOLDER POINTS, C.D.M.
33902, 3003 A
SERVICE MODE 1
Y
q
TURNT.\\ TORNT. \ POWER OFF
a HOT | CHECK C.D.M
! ?
Y N
HEAD~ : OPAMP 7370
‘AMP 76608 D N ™ RILL CIRCUIT 7371, 7372
Tc. 7102 (PIN 28 TESTPOINT 12) orn POTM 3370, JACKBUS’ BU~5
TRANSISTORS 7140, 7141 ? WIRING
SERVICE MODE 2
Y
CHECK: 1.¢. 7002 (TDA8808)
i OPAMP 7003 (B)
° FLEX, SOLDER POINTS, C.D.M.
23065. 3066
SERVICE MODE 3
4
-
:
TLR,
RECEIVER
1461
q
=
o
POWER
SUPP.
(SAFETY
RESISTOR
3460)
LOAD DISC TRANSISTORS 7740, 7741
PRESS PLAY
Y
EXE CHECK: 1C 7001 (TA8808)
PATTERNS, N ‘WIRING
(@ 17) LASER SUPPLY
§ CURRENT TESTPOINTS 1-2
Y
y
:
TESTPOINT
81
: N 1.C, 7102
AYE
TRANSFORMER
5250
PATTERN ) 4 KILL CIRCUIT 7362
(1265) A
CHECK: POWER SUPPLY
SAFETY RESISTORS 3103, 3105, 3111
1.¢,7102 (SAA7341)
ODIO 0)
P 91,92
UD10 ON
TP93, 94
‘AUDIO ON
GO TO SERVICE MODE
INTERM.\ y
o > PRESS PLAY
ar ae ERROR CODES
N
CHECK: FOWER SUPPLY
SAFETY RESISTORS 3305, 3306
CRAMP 7300
: TESTPOINT 96
KILL CIRCUIT ON POWER SUPPLY
TRANSISTORS 7363, 7364
KILL] ON PIN 22 OF I.C. 7700
CHECK: 1.C.7102
SEE SPECIFICATIONS MEASUREMENT
PCS 60 220
HAS1063
9244