LG OK75 - Electrical Troubleshooting: Tuner;Aux Function Check

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ELECTRICAL TROUBLESHOOTING GUIDE
6. TUNER / AUX FUNCTION CHECK
FUNCTION CHECK
Check CN201 pin1, 2: 12 V.
IC501 output data.
Check IC302, JK301.
Replace IC501.
Check IC301
Pin8: ADC_3.3V
Pin13, 14: DVCC_3.3V.
Check
IC301 pin27, 28, 1, 2
input.
Check
IC301 pin18
output data.
NO
NO
NO NO
YES
YES
YES
YES
OK