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5-5
Flow Chart of Troubleshooting and Circuit Diagrams
5-3 Charging Part
Abnormal charging part
Yes
Check the U501 pin 13,14 > 4.9 V ?
Resolder C503 and U501
Yes
No
Q500 pin 5 (CHG_ON)="L"?
Check the circuit related
to CHG_ON Signal
Yes
No
Resolder or replace U501
END
Yes
No
Check the U501 pin 1,15,16 4.2V ?
U501 pin 11 = "H"?
Resolder or replace U501
Yes
No
Check the U501 pin 7="H"?
Resolder R506
No
Yes