
3-10
10. SMPS POWER TROUBLESHOOTING
ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
Is the D943 Normal?
No. 5.6VA
YES
Is the F101 Normal?
Replace the F101 (Use the same Fuse)
YES
NO
Is the BD101Normal?
Replace the BD101
YES
NO
Is the TH101 Normal?
Replace the R101
YES
NO
Is Vcc (9V ~ 18V)
supplied to IC101
2PIN?
Is the D102 normal?
YES
NO
NO
Check or Replace the D102
IS the D959 normal?
Replace the D959
YES
NO
Is there about 2.5V
at the IC103 1PIN?
Replace the IC103
YES
NO
Is the IC102 normal?
Replace the IC102
YES
NO
Is the D947 Normal?
Replace the D947
YES
NO
Is the D949 Normal?
Replace the D949
YES
NO
Is the D940 Normal?
Replace the D940
YES
NO
Replace the D943
YES
NO
Is the D941 Normal?
Replace the D941
YES
NO
Power Line of Main PCB is short
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