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ELECTRICAL TROUBLESHOOTING GUIDE
A
YES
YES
YES
POT. IN
Check MIC board.
Replace IC202.
Check IC501.
NO
NO
NO
IC202
Pin21,22 POT. IN input signal
OK?
IC202
Pin41 ADC data output signal
OK?
IC202
Pin42,43,44 I2S input signal
OK?
TUNER
Check IC501.
Replace IC202.
Check +3.3 V of TU101.
IC202
Pin42,43,44 I2S input
signal OK?
IC202
Pin41 ADC data output
signal OK?
NO
NO
NO
TU101
TUNER_L/R output
signal OK?
YES
A
IC202
Pin23,24 TUNER_L/R input
signal OK?
NO
YES
YES
YES
Summary of Contents for CM9730
Page 11: ...MEMO 1 10 ...
Page 13: ...MEMO 2 2 ...
Page 59: ...MEMO 3 42 ...
Page 83: ...3 89 3 90 2 MAIN P C BOARD TOP VIEW ...
Page 84: ...3 91 3 92 MAIN P C BOARD BOTTOM VIEW ...
Page 85: ...3 93 3 94 3 VFD P C BOARD ...
Page 86: ...3 95 3 96 4 MAIN VOLUME P C BOARD 5 MIC P C BOARD ...
Page 87: ...3 97 3 98 6 JOG P C BOARD 7 USB P C BOARD 8 TUNER P C BOARD ...
Page 89: ...3 101 3 102 MEMO MEMO ...