Samsung SGH-T429 Service Manual - Page 37

Charging Part

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9-3. Charging Part Abnormal charging part Yes Check the U303 pin 38 > 4.9V Yes U303 pin 34(AUX_ON) = "L"? Yes Check the U303 pin 46 ≒ 1.4V Yes END Flow Chart of Troubleshooting No Check the circuit related to V_EXT_CHARGE No Check the circuit related to AUX_ON signal No Resolder or replace U303 9-5 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization

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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 U303 pin 38
> 4.9V
Abnormal charging part
END
No
Yes
U303 pin 34(AUX_ON)
= "L"?
No
Yes
Check the U303 pin 46
≒ 1.4V
No
Yes
Check the circuit related to
V_EXT_CHARGE
Check the circuit related to
AUX_ON signal
Resolder or replace U303
Yes