Marantz MAR770 - Manual (Page 17)

15
Figure 7-6
CD MODULE PLAYBACK
PRESS <PLAY>
AUDIO?
DAC 7309
TESTPOINTS 20, 21, 22 : I2S AT INPUT OF DAC 7309
CHECK POWER SUPPLY PINS 4, 13
CHECK CLK11 AT PIN 6 : 11.2896MHz
PIN 11 : MUTE HIGH?
TESTPOINTS 23, 24 : ANALOG OUTPUT?
REPLACE DAC 7309
OPAMP 7120
TESTPOINTS 23, 24 : ANALOG OUTPUT?
POWER SUPPLY: PIN 8 12V
REPLACE OPAMP 7120
NO
YES
PLAYBACK CD
MODULE OK
DISTORTION?
NO
YES
NO
DAC 7309
OPAMP 7120
AUDIO
CD OUT PCB?
YES
FLEX TO CDR MAINBOARD
FLEX TO CD OUT BOARD
CHECK I/O BOARD, CD OUT BOARD
CL 96532086_031.eps
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