Sharp SGH-F250 - Manual (Page 34)

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Flow Chart of Troubleshooting
9-6
9-3. Charging Part
Check the U305 pin 38
> 5.0V
Abnormal charging part
END
No
Yes
U305 pin 34(AUX_ON)
= "L"?
No
Yes
Check the U305 pin 36
≒ 1.25V
No
Yes
Check the circuit related to
V_EXT_CHARGE
Check the circuit related to
AUX_ON signal
Resolder or replace U305
Yes