LG SPH4B-W - Page 45

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ELECTRICAL TROUBLESHOOTING GUIDE
Q301 is not 12 V
Check F301 Voltage 25 VA
Check Adapter
Replace Main PCB
NO
YES
NO
Check FB304 Voltage 12 VA
Check R774
Voltage 12 V
Check Q301 2pin
Voltage 12 V
Check IC302
YES
YES YES
NO
NO
OK
OK
ADAPTER POWER CIRCUIT
YES