Charging Part - Samsung SGH-E740S Service Manual

Flow Chart of Troubleshooting

9-3. Charging Part

Abnormal charging part
Yes
No
Check the U403 pin 38 Check the circuit related to
V_EXT_CHARGE
> 4.9V
Yes
No Check the circuit related to
U403 pin 34
AUX_ON signal
= "L"
Yes
No
Check the U403 pin 46
Resolder or replace U403
≒ 1.4V
Yes
END
9-6
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