Marantz MAR770 User Manual

Page 13

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11

Figure 7-2

PLAY BACK OF CD-DA

DISCS OK

PRESS <PLAY>

CD-DA DISC LOADED

CHECK:

CHECK:

PLAY AUDIO SIGNALS DISC TRACK 15:
SIGNAL OF 5.4 VPP ON PINS 1 AND 3 OF CONN.
J652

KILL VOLTAGE (pin 7 conn. JJ01):
-8V DURING PLAY

NO

NO

NO

NO

NO

YES

YES

YES

YES

HEADPHONE?

DIGITAL

YES

DISTORTION?

DISPLAY:

“CD” &

T.O.C. INFO?

YES

DISC

DETECTION &

READING?

ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

CHECK:

DISC: DIRT, SCRATCHES, DAMAGED...

NO

POWER SUPPLY VOLTAGES
ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

CHECK:

WIRING

I/O BOARD

W651 CONNECTION
FLEX CONNECTION
+5V (pin 8 conn. JJ01)

KILL TRANSISTORS QN51 - QN54

AUDIO

ANALOG

OUT?

ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

AUDIO CONNECTIONS & CABLES

CHECK:

I/O BOARD

FLEX CONNECTION
+5V (pin 8 conn. JJ01)

ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

AUDIO CONNECTIONS & CABLES

WIRING OF HEADPHONE/IR BOARD

ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

CHECK:

DIGITAL OUT TRANSFORMER LT02, Q311

AUDIO CONNECTIONS & CABLES

I/O BOARD

FLEX CONNECTION
+5V (pin 8 conn. JJ01)

ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF

"DERRn"

OR

"BERRn" ERROR OCCURS

AUDIO

OUT?

CL 96532076_017.eps

290799

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