Marantz 74 CD38 - Page 19

FAULTFINDING GUIDE
POWER SUPPLY CHECK: FUSES
MAINSTRANSFORMER
VOLTAGES: AC DC FTD
SAFETY RESISTORS
DISPLAY CHECK: COMMUNICATION uP - FTD
WIRING
DISPLAY DRIVER
MICROPROCESSOR 7700 PIN 12 uP 7700
OPAMP 7600A
TRAY MECHANISM
WIRING
SEE FAULTFINDING GUIDE OF CDM-12 ON .
a CHECK: OPAMP 7370
CHECK:
POWER
SUPPLY
KILL
CIRCUIT
7362,
7363
N
SAFETY RESISTORS 3113,3115
1.7100
(SAA7345)
Fe
OT
AeREUS
1371
CHECK: POWER SUPPLY
SAFETY RESISTORS 3280,3302,3303
1.C,7280 (TDA1545)
OPAMP 7300
CHECK: |.R. RECEIVER 1040
PIN 37 OF IC. 7700
CHECK: TESTPOINT 95,96
KILL CIRCUIT ON POWER SUPPLY
TRANSISTORS 7360,7361
KILLI ON PIN 16 OF 1.C.7700
KILLL, KILLA ON PIN 27, 26 OF 1.C.7100
TRANSISTORS 7364,7365
CHECK: |.C.7280 (TDA1545)
SEE SPECIFICATIONS MEASUREMENT
GO TO SERVICE MODE
PRESS PLAY
ERROR MESSAGES
HAS1123
9345
PCS 60 683