3-8
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
NO
NO
YES
YES
Check connections between
1389DE/LP and pick-up head.
Check cable connection
on pick-up head.
NO
YES
YES
YES
YES
YES
Check cable connection
on pick-up head.
Check RF signal waveform.
Focus
on OK?
Proper
signals on A,B,C,D of
1389DE/LP
NO
NO
Check the TRD
connection on 1389DE/LP
and motor driver
Track
on OK?
Disc is play?
Properly
TRD signal on
1389DE/LP?
NO
Check the tracking control
amp circuit on motor driver
TRK+ & TRK-
output properly?
NO
Check the FOD connection on
1389DE/LP and motor driver.
Check
FOD signal on
1389DE/LP
YES
Check the focus control
amp circuit on motor driver
FCS+ & FCS-
output properly?
D
E