Tuner / Aux Function Check - LG CM4330 Service Manual

AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE

7. TUNER / AUX FUNCTION CHECK

FUNCTION CHECK
YES
Check IC401
(CS5346) Pin7, 8,
23, 24 input.
YES
Check IC401
(CS5346) Pin9 output
data.
YES
Check
IC801(BX8805)
input data.
YES
IC501(MLC9800)
output data.
YES
OK
NO
Check JK401,TU100.
Check IC401
NO
Pin5: +5 V
Pin46: +3.3 V.
YES
Check IC401
NO
Pin5: +5 V,
Pin6: High,
Pin46: 3.3 V.
3-25
NO
Check CN105 Pin7: +5 V
Pin9, 10: +3.3 V.
Check IC401
NO Pin41: SDOUT,
Pin42: SLCK,
Pin43: LRCK,
Pin44: MCLK.
YES
Replace IC401.