LG XB12 Service Manual page 19

MICOM IC104 TROUBLESHOOTING
CHECK IC104 VDD PIN9,36,45.
YES
CHECK P-SENSE
SIGNAL.
YES
CHECK X101
OSCILLATION.
YES
CHECK IC104
PIN53 (RESET).
YES
REPLACE IC104.
IC701 TROUBLESHOOTING
CHECK IC701
PIN1=9V.
YES
CHECK IC104
CLK DATA PIN14,15.
YES
CHECK CONTROL
FUNCTION.
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Only for training and service purposes
NO
NO
REFER TO P-SENSE CHECK.
NO
NO
CHECK RESET CIRCUIT.
NO
NO
FROM TUNER TO PORTABLE
NO
- 3-5 -
CHECK P1702 PIN1.
CHANGE X101.
CHECK SMPS.
CHECK CLK DATA BY
CHANGE FUNCTION
CHANGE IC701.
LGE Internal Use Only