LG BH9530TW Service Manual page 67

ELECTRICAL TROUBLESHOOTING GUIDE
No 5V_MIC (AVCC_5V)
YES
Is the
VCC supplied to IC154
pin2?
YES
Is there
signal at IC154
pin1?
YES
Check IC154 and replace.
No 5V_USB (5V_IPOD)
YES
Is the
VCC supplied to IC151
pin14?
YES
Is there
signal at IC151
pin16?
YES
Check IC151 and replace.
NO
Check 6 VA on SMPS board.
NO
Check IC100 pin68 (LDO_CTRL).
NO
Check 14 VA on SMPS board.
NO
Check IC100 pin68 (LDO_CTRL).
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