Charging Part - Samsung SGH-E370 Service Manual

9-3. Charging Part

Abnormal charging part Abnormal charging part
Check the
Check the
Yes Yes
U500 pin 1
> 4.9V
Yes Yes
U500 pin 5 = "L"?
Yes Yes
U500 pin 3 = "L"?
Yes Yes
U500 pin 10
≒ 4.2V
Yes Yes
END END
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Check the circuit related to Check the circuit related to
No No
No No
Resolder or replace U503 Resolder or replace U503
Check the circuit related to Check the circuit related to
No No
No No
Resolder or replace U503 Resolder or replace U503
9-5
Flow Chart of Troubleshooting
V_EXT_CHARGE V_EXT_CHARGE
AUX_ON signal AUX_ON signal