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1. POWER (SMPS)

No 12 VA

YES

F901 normal?

Replace F901 (Use the same fuse).

YES

BD901 normal?

Replace BD901.

YES

TH901(TH903) normal?

Replace TH901.

YES

Is Vcc

(10 V ~ 18 V) supplied to

IC901 pin2?

D902 normal?

YES

Check or replace D902.

Is there

about 2.5 V at

IC941 pin1?

Replace IC941.

YES

D951 normal?

ZD932 normal?

Replace D951.

Replace ZD932.

YES

D921/ D922 normal?

Replace D921/ D922.

YES

Power line of main PCB is short.

3-23

Only for training and service purposes.

ELECTRICAL TROUBLESHOOTING GUIDE

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