LG FB162I Service Manual page 44

D
Focus On OK?
YES
Track On OK?
YES
Disc play?
E
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Only for training and service purposes
NO
Proper signal on
A,B,C,D from MD?
YES
Proper FOO signal
on IC401?
YES
Check cable connection
between P400 and MD.
NO
Proper TRO signal
on IC401?
YES
T+&T-output
properly?
YES
Check cable connection
on pick-up head.
NO
Check RF signal waveform.
5-5
NO
Check the connections between
P400 and pick-up head.
NO
Check the related circuit of ES8380
FOCUS signal.
NO
Check the related circuit between
IC401 and ES8380
NO
Check the Tracking control
on motor driver (IC401).
LGE Internal Use Only