LG FA162 - Tuner Function Check

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ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
7. TUNER FUNCTION CHECK
Tuner function check
Replace the related part.
Check SMPS.
Replace the related part.
OK
Check μ-com (IC100)
Pin3, 69 communication.
Refer to SMPS troubleshooting.
Check IC201.
Check tuner module power
(Pin6 3.3 V).
Check IC104 Pin3.
NO
NO
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.
Check
tuner module (TU100)
operation.
YES
NO
YES
YES
YES
Check IC201
CS5346 Pin21, 22 input
waveform.
Check IC201
CS5346 Pin42, 43 output
waveform.
NO
NO
YES
YES