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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
NO
YES
NO
Check related circuit
between IC401 and
ES8380.
NO
Check Tracking control
on IC401.
Check P400 connec-
tion with pickup.
Track On OK?
Proper TRO
signal on
IC401?
YES
T=& T- output
properly?
YES
YES
NO
Check RF Signal
Waveform.
Disc Play.
YES
NO
Video Output OK?
NO
Check picture signal data on
ES8380 pin110 and check
mute signal on Q503.
Video Output OK?
NO
Refer on DVD/ USB Function
Audio Abnormal Checking.
All output OK?
All output OK?