Charging Part - Samsung SGH-E350E Service Manual

7-3. Charging Part

Abnormal charging part Abnormal charging part
Check the U505 pin 1 Check the U503 pin 1
Check the U505 pin 10 Check the U503 pin 10
Yes
> 4.9V > 4.9V
Yes Yes
U505 pin 5 = " L " ? U503 pin 5 = " L " ?
Yes Yes
U505 pin 3 = " L " ? U503 pin 3 = " L " ?
Yes Yes
¡ Ö 4.2V ¡ Ö 4.2V
Yes Yes
END END
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Check the circuit related to Check the circuit related to
No No
No No
Resolder or replace U505 Resolder or replace U503
Check the circuit related to Check the circuit related to
No No
No No
Resolder or replace U503 Resolder or replace U505
7-7
Flow Chart of Troubleshooting
V_EXT_CHARGE V_EXT_CHARGE
AUX_ON signal AUX_ON signal