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SGH-X450 Flow Chart of Troubleshooting
7-4
4. Charging Part
The pin#17, #18 of
CN800 is TA_VEXT ≒
5V ?
Abnormal charging operation
Replace TA or Check CN800-1
No
END
Yes
The pin#7 of U301 is 3.2~4.2V ?
Check the U301
No
Yes
No
Solder again or change R306
Yes
The ICHRG = 1.4V(during
charging) and ≒ 180mV(full
charging) ?