Tuner / Aux Function Check - LG CMS4750F Service Manual

AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE

7. TUNER / AUX FUNCTION CHECK

FUNCTION CHECK
YES
Check IC201
(CS5346) Pin23, 24,
26, 27 input.
YES
Check IC201
(CS5346) Pin41 output
data.
YES
Check
IC501(MLC3730)
input data.
YES
IC501(MLC3730)
output data.
YES
OK
NO
Check JK200,TU500.
Check IC201
NO
Pin5: +3.3 V
Pin14: +5 V.
YES
Check IC201
NO
Pin5: +3.3 V,
Pin6: High,
Pin14: +5 V.
3-25
NO
Check CN501 Pin7,8: +5.6 V.
Check IC201
NO Pin41: SDOUT,
Pin42: SLCK,
Pin43: LRCK,
Pin44: MCLK.
YES
Replace IC201.