Power Amp Part Check - LG DM5360K Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

5. POWER AMP PART CHECK

POWER AMP PART
Check CON103
pin7: +12 V, pin3, 4: 28 V.
Check IC701 pin29, 30, 31, 36, 37, 38
input voltage(28 V).
Check IC701 pin2: +12 V input.
Check PWM Modulator input IC701 pin5, 6, 14, 15.
Check IC701 pin27, 28, 32, 35, 39, 40.
Check output line coil.
OK
YES
YES
YES
YES
YES
YES
YES
NO
Refer to SMPS troubleshooting.
NO
Check each line resistor output voltage.
NO
3-20
Replace the coil.