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3-21
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Only for training and service purposes
LGE Internal Use Only
OPEN/CLOSE abnormal
Check SW402 switch
Refer to SERVO part.
YES
YES
Check IC(U203) Pin 130
Check the connectin of MD.
YES
Refer to SERVO part.
YES
NO
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
Picture abnormal
Check the disc.
YES
YES
Refer to SERVO part
YES
Check MPEG_CLK
Signal of MPEG part
YES
Check MPEG (IC U201)
YES
Replace B/D
F. PICTURE ABNORMAL
H. OPEN/CLOSE ABNORMAL
Disc error
Check Disc
YES
YES
Refer to SERVO part
YES
YES(If OK)
YES(If OK)
YES(If OK)
(If OK)
Replace B/D
G. DISC ERROR