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Flow Chart of Troubleshooting
9-8
9-3. Charging Part
Check the C367,R302
> 4.9V
Abnormal charging part
END
No
Yes
Check U309 pin 5
= 'L' ?
No
Yes
Check the U309 pin 9
≒ 4.2V
No
Yes
Check the circuit related to
V_EXT_5V and U309
Check the circuit related to
CHG_ING_Nn signal
Resolder or replace U309
Yes