![background image](http://html.mh-extra.com/html/samsung/sgh-e390/sgh-e390_service-manual_1190563044.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-5
9-3. Charging Part
Check the U505 pin 16
> 4.9V
Abnormal charging part
END
No
Yes
U505 pin 12 = "L"?
No
Yes
U505 pin 4 = "L"?
No
Yes
Check the U505 pin 15
≒ 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