LG XB12 Service Manual page 17

P-SENSE
DOES 5V APPEAR IN
PN7102 PIN4?
YES
P1702 PIN4 CHECK.
YES
IC104 PIN49.
AUDIO AB-NORMAL
CHECK OUTPUT
FROM IC701.
YES
CHECK INPUT FOR
IC702 (PIN4,12).
YES
CHECK OUTPUT IC702.
YES
CHECK OUTPUT JK701.
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Only for training and service purposes
NO
NO
NO
NO
CHECK IC701 PIN1
= 9V.
NO
CHECK PATH FROM
IC701 TO IC702
NO
CHECK IC702 PIN3
= 10V.
NO
CHECK PATH FROM
IC702 TO JK701.
- 3-3 -
SMPS CHECK.
CONNECTOR CHECK.
CHANGE IC104.
NO
CHECK SMPS.
NO
CHECK SMPS.
LGE Internal Use Only