LG SN4A - Page 47

3-18
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ELECTRICAL TROUBLESHOOTING GUIDE
No 12 V
Check F301 Voltage 25 VA
Check Adapter
Check Q301 change
NO
YES
NO
Check R371 Voltage 12 VA
Check R377
Voltage 12 V
Check Q301 2pin
Voltage 12 V
Check IC302
YES
YES YES
NO
NO
OK
OK
ADAPTER POWER CIRCUIT
YES