LG NP7550 - Electrical Troubleshooting Guide; Power;Dsp;Amp

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ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER/DSP/AMP
Power/DSP
Connect CN901.
Replace L509.
Replace IC902.
Replace L501.
OK
Charge the battery.
Check connection
of CN901.
Is the input voltage
1.2 VA? (L509)
Is voltage
of IC902 3.4 V?
Is the input voltage
3.4 VA? (L501)
Is voltage
of the battery above 6.5 V?
(CN901)
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Power/ AMP
Connect CN901.
Replace IC907.
OK
Charge the battery.
Check connection
of CN901.
Does 13 V flow IC700?
(Check pin2, 3, 34, 35.)
Is voltage
of the battery above 6.5 V?
(CN901)
NO
NO
NO
YES
YES
YES