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SGH-E100 Flow Chart of Troubleshooting
7-
5
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3. Charging Part
Check the U405 pin 13,14
> 4.9V
Abnormal charging part
END
No
Yes
U405 pin 11 = "H"?
No
Yes
U406 pin 5 (CHG_ON)
= "L"?
No
Yes
Check the U405 pin 7
= "H"?
No
Yes
Check the the circuit related to
V_EXT_CHARGE
Resolder or replace U405
Check the circuit related to
CHG_ON signal
Resolder U405
Yes
U405 pin 1,15,16
≒ 4.2V?
Resolder or replace U405
No