Power Amp Part Check - LG MBD-D102X Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

6. POWER AMP PART CHECK

Power AMP part check
P7905 3PIN +
13, 14, 15PIN 23.5V
Check input power IC700
34, 29, 26, 21PIN.
Check input power of IC700,
1, 36, 17, 18, 19PIN +12V
Check PWM MODULATOR
input 4, 6, 14, 16PIN
Check POWER IC 700 34,
29, 27, 20PIN output.
Check output LINE COIL
OK
YES
YES
YES
YES
YES
YES
YES
NO
Refer to SMPS
Troubleshooting
NO
Check resistance power
IC700: R702, 701, 726, 727, 724
NO
Replace the related parts
3-6