Faultfinding Trees - Marantz CDR631 Service Manual

6. Faultfinding Trees

SWITCH ON POWER
PRESS <OPEN/CLOSE>
NO DISC LOADED
PRESS <DISPLAY>
CHECK:
•
•
NO
•
DISPLAY?
YES
CHECK:
NO
•
DISPLAY:
"INSERT DISC"
•
•
YES
PRESS
<OPEN/CLOSE>
CHECK:
•
NO
TRAY?
YES
•
INSERT DISC
NO
CD-DA DISC
LOADED?
YES
SEE CD-DA DISC SEE CD-R DISC
FAULT FINDING FAULT FINDING
MAINS, MAINS CABLE
POWER SUPPLY & TRAFO
⇒
WIRING
⇒
ON/OFF SWITCH
⇒
FUSES
⇒
VOLTAGES
DISPLAY (SEE FAULT FINDING GUIDE DISPLAY BOARD)
⇒
WIRING
⇒
SUPPLY VOLTAGES
⇒
CLOCK SIGNAL 8MHz
⇒
CONTROL SIGNALS
⇒
KEYBOARD
⇒
STANDBY LED
⇒
ELECTRICAL SERVICE DIAGNOSTICS:
DISPLAY TEST, KEYBOARD TEST
WIRING
POWER SUPPLY VOLTAGES
ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF "DERRn"
OR "BERRn" ERROR OCCURS
DISPLAY BOARD (SEE FAULT FINDING GUIDE DISPLAY BOARD)
⇒
WIRING
⇒
SUPPLY VOLTAGES
⇒
CLOCK SIGNAL 8MHz
⇒
CONTROL SIGNALS
⇒
KEYBOARD
⇒
ELECTRICAL SERVICE DIAGNOSTICS:
DISPLAY TEST, KEYBOARD TEST
MECHANICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF ERROR OCCURS
NO
CD-R DISC CD-RW DISC
LOADED? LOADED?
YES YES
SEE CD-RW DISC
FAULT FINDING
Figure 6-1
10