Table of Contents
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5-3 Charging Part
Abnormal charging part
Check the CN502 pin 17,18
Check the U639 pin 3
Check the U639 pin 5
5-5
Yes
5.2V ?
Yes
5.2 V ?
Yes
U639 pin 4 = "L" ?
Yes
4.2V ?
Yes
END
No
Replace TA
No
Resolder C111, L632, C710
No
Resolder R328
No
Resolder components around
Flow chart of trouble shooting and Circuit Diagram
U639
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