LG S94T1-S 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 USB_5V
YES
Is the
VCC supplied to IC152
pin2?
YES
Is there
signal at IC152
pin1?
YES
Check IC152 and replace.
NO
Check 6 VA on SMPS board.
NO
Check IC100 pin68 (LDO_CTRL).
NO
Check 6 VA on SMPS board.
NO
Check IC100 pin68 (LDO_CTRL).
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