Flow Chart of Troubleshooting

9-3. Charging Part

Abnormal charging part

Yes

Check the U305 pin 38

> 5.0V

Yes

U305 pin 34(AUX_ON) = "L"?

Yes

Check the U305 pin 36

1.25V

Yes

END

No

No

No

Check the circuit related to

V_EXT_CHARGE

Check the circuit related to AUX_ON signal

Resolder or replace U305

9-6

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Image 34
Sharp SGH-F250 manual Charging Part