Audio Electrical Troubleshooting Guide; Power (Smps) - LG XC62-A0U Service Manual

SECTION 3 AUDIO PART ELECTRICAL

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER (SMPS)

No .5.6VA
Is the F101 normal?
Is the BD101 normal?
Is the TH101 normal?
Is Vcc (9V - 18V)
supplied to IC101 Pin2?
IS the D959 normal?
Is there about 2.5V at the
IC103 Pin1?
Is the IC102 normal?
Is the D947 normal?
Is the D949 normal?
Is the D940 normal?
Is the D943 normal?
Is the D941 normal?
Power line of main PCB is short
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
Replace the F101 (Use the same fuse)
NO
Replace the BD101
NO
Replace the R101
NO
Is the D102 normal?
Check or Replace the D102
NO
Replace the D959
NO
Replace the IC103
NO
Replace the IC102
NO
Replace the D947
NO
Replace the D949
NO
Replace the D940
NO
Replace the D943
NO
Replace the D941
3-1
NO