Samsung SGH E590 Service Manual - Page 42
Charging Part
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9-3. Charging Part Abnormal charging part Yes Check the U402 pin 38 > 5.0V Yes U402 pin 34(AUX_ON) = "L"? Yes Check the U402 pin 36 ≒ 1.25V 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 U402 9-5 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
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 U402 pin 38
> 5.0V
Abnormal charging part
END
No
Yes
U402 pin 34(AUX_ON)
= "L"?
No
Yes
Check the U402 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 U402
Yes