LG SN4A - Page 45

3-16
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ELECTRICAL TROUBLESHOOTING GUIDE
ADAPTER POWER CIRCUIT
No 1.5 V
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 R374 Voltage 1.5 V
Replace IC302
Replace IC303
YES
YES
NO
NO
OK