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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
DOES 5V APPEAR IN
PN7102 PIN4?
YES
YES
NO
CONNECTOR CHECK.
NO
SMPS CHECK.
IC104 PIN49.
NO
CHANGE IC104.
P-SENSE
P1702 PIN4 CHECK.
CHECK OUTPUT
FROM IC701.
YES
YES
YES
CHECK PATH FROM
IC701 TO IC702
CHECK IC701 PIN1
= 9V.
CHECK IC702 PIN3
= 10V.
AUDIO AB-NORMAL
CHECK INPUT FOR
IC702 (PIN4,12).
NO
CHECK OUTPUT JK701.
CHECK PATH FROM
IC702 TO JK701.
NO
NO
NO
CHECK SMPS.
CHECK SMPS.
NO
NO
CHECK OUTPUT IC702.