LG FAS166F - Power Amp Part Check

3-20
ELECTRICAL TROUBLESHOOTING GUIDE
9. POWER AMP PART CHECK
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 each IC702 Pin25,26,55,56
input voltage.
Check PWM modulator input
each Pin3, 4, 10, 11.
Power IC702,
Pin28,29,36,37,44,45,52,53 output.
NO
NO
NO
CN702
Pin1: +12V Pin2,3: 25V
Check
IC702 Pin25,26,55,56 :+12V
input.
Check output line coil.