Aux Function Check - LG FA162 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

6. AUX FUNCTION CHECK

AUX function check
Check whether
JK201 contacts or not.
YES
Check IC201
CS5346 Pin23, 24 input
waveform.
YES
Check IC201
CS5346 Pin42, 43 output
waveform.
YES
Check IC201
Pin41 SDOUT.
YES
OK
Check
NO
L201, L202, C221, C226,
R242, R243.
Replace the related part.
Check IC201
NO
Pin14: 5 V,
Pin5, 36, 46: 3.3 V
Replace the related part.
NO
Check IC201.
3-11
NO
YES
NO
YES
Check μ-com (IC100)
Pin3, 69 communication.
Refer to SMPS troubleshooting.