Optical Function - LG SL4Y Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. OPTICAL FUNCTION

OPTICAL FUNCTION
Check JK502
Check IC501 pin65
Input waveform
OK
YES
YES
YES
NO
Check R549 3.3VA Voltage
Refer to Power Part Troubleshooting
NO
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3-25
Replace Main PCB
NO
Check R528
YES
Check C511
Replace Main PCB
Only for training and service purposes.