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1. POWER (SMPS)
No 3.7 VA
YES
F901 normal?
Replace F901 (Use the same fuse).
YES
NO
BD901 normal?
Replace BD901.
YES
NO
TH901 normal?
Replace TH901.
YES
NO
Is Vcc
(10 V ~ 18 V) supplied to
IC901 Pin7?
D904 normal?
YES
NO
Check or replace D904.
Is there
about 2.5 V at
IC903 Pin1?
Replace IC903.
YES
NO
D923 normal?
Replace D923.
YES
NO
D921 normal?
Replace D921.
YES
NO
D924 normal?
Replace D924.
YES
NO
D925 normal?
Replace D925.
YES
NO
D922 normal?
Replace D922.
YES
NO
Power line of Main PCB is short.
NO
3-16
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
Summary of Contents for CM4330
Page 13: ...1 12 MEMO ...
Page 15: ...2 2 MEMO ...
Page 19: ...A60 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS4330F ...
Page 51: ...3 32 MEMO ...
Page 66: ...3 61 3 62 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 67: ...3 63 3 64 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...