4-7
7. POWER AMP PART CHECK
P7905 3PIN +
13, 14, 15 PIN 29V
Check input power IC700
34, 29, 26, 21 PIN.
Check input power of IC700,
1, 36, 17, 18, 19 PIN +12V
Check PWM MODULATOR
input 4, 6, 14, 16 PIN
Check POWER IC 700 34,
29, 27, 20 PIN output.
Check output LINE COIL
OK
Refer to SMPS
Troubleshooting
Check resistance power
IC700:R702,701,726,727,724
Replace the related parts
YES
YES
YES
YES
YES
YES
NO
NO
NO
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only