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Flow Chart of Troubleshooting
9-6
9-3. Charging Part
Yes
Resolder or replace U403
Check the circuit related to
AUX_ON signal
Check the circuit related to
V_EXT_CHARGE
Yes
No
Check the U403 pin 46
≒ 1.4V
Yes
No
U403 pin 34
= "L"
Yes
No
END
Abnormal charging part
Check the U403 pin 38
> 4.9V
Summary of Contents for SGH-E740S
Page 35: ...8 PCB Diagrams 8 1 Top ...
Page 36: ...PCB Diagrams 8 2 Bottom ...