LG FA162 - Aux Function Check

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ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
AUX function check
Replace the related part.
Replace the related part.
OK
Check whether
JK201 contacts or not.
Check μ-com (IC100)
Pin3, 69 communication.
Refer to SMPS troubleshooting.
Check IC201.
NO
NO
NO
Check
L201, L202, C221, C226,
R242, R243.
Check IC201
Pin14: 5 V,
Pin5, 36, 46: 3.3 V
Check IC201
Pin41 SDOUT.
YES
YES
YES
6. AUX FUNCTION CHECK
Check IC201
CS5346 Pin23, 24 input
waveform.
Check IC201
CS5346 Pin42, 43 output
waveform.
NO
NO
YES
YES
YES