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SGH-X400 Flow Chart of Troubleshooting
4. Charging Part
Abnormal charging part
Check the pin 17, 18
Check the pin 5 of
Check the pin 3 of
Check the pin 5 of
U101 is "3.2~4.2V"?
charging) and around
200mV(full charging)?
Yes
of CN300 is
TA_VEXT>4?
Yes
Q102 is "High"?
Yes
Q102 is "Low"?
Yes
Yes
Check the pin 5
1.5V~1V(during
Yes
END
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No
Replace TA,Check CN300
No
Check the Q102
No
Check the Q102
No
Check the U101
No
Check the U101 or Resolder or
change R102
4-4
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