LG CT-25/29M60VE/VQ - Manual (Page 21)

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AV Stereo
Select correct system
In menu
Check the connection
Of AV equipment
Check the the waveform
At pin47 of IC661
Check TU101 Tuner
Check the waveform
At pin 24, 25, of IC661
Check waveform
At pin 4, 12 of IC602
Check the voltage
At pin6,7 of IC602
Check the waveform
At pin 1,2,14,15 of IC602
Check the voltage
Of pin16,20
Check / Replace
IC602
Check / Replace
Q621, IC603
Check the vpltage
At pin3, 13 of IC602
Replace IC 602
Check /Replace
F851, D862
OK
AV
OK OK
OK
OK
OK
OK
NO NO
NO
NO
NO
NO
OK