LG SPH4B-W - Page 44

3-15
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ELECTRICAL TROUBLESHOOTING GUIDE
ADAPTER POWER CIRCUIT
IC303 is not 1.3 VA
Check F301 Voltage 25 VA
Check FB305 Voltage 5.1 VA
Check Adapter
Replace Main PCB
YES
YES
YES
NO
NO
Check FB304 Voltage 12 VA
Check R314 Voltage 1.3 VA
Replace Main PCB
Replace Main PCB
YES
YES
NO
NO
OK