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SGH-P400 Flow Chart of Troubleshooting
3-
7
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4. Charging Part
The pin #17, #18 of
CN300 is TA_VEXT
=
5V?
Abnormal charging operation
The pin #3 of U102 is
"low"?
Replace TA or Check CN300
Check the U102
Check the Q101
END
No
Yes
Yes
Yes
No
No
The pin #3 of Q101 is
"low"?
The pin #5 of U101 is
3.2~4.2V?
Check the U101
No
Yes
The ICHRG = 1V(during
charging)
and
=
180mV(full
charging)?
No
Solder again or change R108
Yes