Marantz MAR770, DR-6000, MAR775 service manual Faultfinding trees, CDR-Module

7.Faultfinding trees

7.1CDR-Module

NO DISC LOADED

SWITCH ON POWER

NO

DISPLAY?

YES

CHECK:

MAINS, MAINS CABLE

POWER SUPPLY (SEE FAULT FINDING GUIDE PSU) 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

DISPLAY:

NO

CHECK:

WIRING

"INSERT DISC"

YES

PRESS

<OPEN/CLOSE>

NO

TRAY?

YES

INSERT DISC

PRESS <OPEN/CLOSE>

NO

CD-DA DISC

LOADED?

YES

POWER SUPPLY VOLTAGES

ELECTRICAL SERVICE DIAGNOSTICS:

REPLACE CDR MODULE IF "DERRn"

OR "BERRn" ERROR OCCURS

CHECK:

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-DA DISC FAULT FINDING

SEE CD-R DISC

FAULT FINDING

Figure 7-1

SEE CD-RW DISC FAULT FINDING

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