LG SN4A - ELECTRICAL TROUBLESHOOTING GUIDE

3-15
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Only for training and service purposes.
ELECTRICAL TROUBLESHOOTING GUIDE
No 3.3 VA
Check F301 Voltage 25 VA
Check FB305 Voltage 5.1 VA
Check Adapter
Replace IC305
YES
YES
YES
NO
NO
Check R371 Voltage 12 VA
Check R373 Voltage 3.3 VA
Replace IC302
Replace IC301
YES
YES
NO
NO
OK
1. ADAPTER POWER CIRCUIT