Samsung SGH-E340 - Component and Peripheral Troubleshooting

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Flow Chart of Troubleshooting
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7-5
7-3. Charging Part
Check the U505 pin 1
> 4.9V
Abnormal charging part
END
No
Yes
U505 pin 5 = "L"?
No
Yes
U505 pin 3 = "L"?
No
Yes
Check the U505 pin 10
≒ 4.2V
No
Yes
Check the circuit related to
V_EXT_CHARGE
Resolder or replace U505
Check the circuit related to
AUX_ON signal
Resolder or replace U505
Yes