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Flow Chart of Troubleshooting
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9-5
9-3. Charging Part
Yes
Resolder or replace U317
Check the circuit related to
AUX_ON signal
Resolder or replace U317
Check the circuit related to
V_EXT_CHARGE
Yes
No
Check the U317 pin 9
≒ 3.8V
Yes
No
U317 pin 4 = "L"?
Yes
No
U317 pin 6 = "L"?
Yes
No
END
Abnormal charging part
Check the U317 pin 10
> 4.9V