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7. POWER AMP PART CHECK
Power AMP part check
YES
P7905_3PIN : +12V,
PIN13, 14, 15 : 35V.
YES
Check IC700 PIN21, 26, 29, 34 input voltage.
YES
Check
IC700 PIN1,17, 18, 19, 36
+12V input.
YES
Check PWM modulator input.
Each IC PIN4, 6, 14, 16
YES
Power IC700 PIN20, 27, 29, 34 output.
YES
Check output line coil.
YES
OK
LGE Internal Use Only
NO
Refer to SMPS troubleshooting.
NO
Check each LINE registor output voltage.
IC700 : R701, 702, 726, 727
NO
Replace the coils
3-9
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Only for training and service purposes
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- Model : Xcs62F
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Troubleshooting
