Electrical Troubleshooting Guide; Adapter Power Circuit - LG SNC4R Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. ADAPTER POWER CIRCUIT

IC301 is not 3.3 VA
Check F301 Voltage 25 VA
Check FB304 Voltage 12 VA
Check FB305 Voltage 5.1 VA
Check R308 Voltage 3.3 VA
OK
YES
YES
YES
YES
YES
NO
NO
NO
NO
3-14
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Check Adapter
Replace Main PCB
Replace Main PCB
Replace Main PCB
Only for training and service purposes.