LG OM7560 - Circuit Diagrams

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ELECTRICAL TROUBLESHOOTING GUIDE
5. POWER AMP PART CHECK
YES
YES
YES
YES
YES
YES
YES
POWER AMP PART CHECK
OK
Refer to SMPS troubleshooting.
Check each line resistor output voltage.
Replace the coil.
Check IC701, IC702
Pin51, 52, 42, 43, 38, 39, 30, 31 input voltage.
Check PWM modulator input
IC701 pin4, 5/ IC702 pin4, 5, 10, 11.
Check IC701, IC702
pin28, 29, 36, 37, 44, 45, 52, 53.
NO
NO
NO
Check CN202 pin1, 2: 12 V,
pin8, 9, 10: 48.5 V (35.5 V).
Check IC701, IC702
pin64: AMP_12V input.
Check output line coil.