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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
4. Charging Part
Abnormal charging operation
The pin #17,18 of CN301
(VEXT) is 5V ?
The pin#6 OF U302 LOW?
The pin#2 of U302 is Low?
The pin#5 of U301 is
3.2~4.2V?
The ICHRG =1V(during charging)
& 180mV(full charging)?
END
YES
YES
YES
YES
YES
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NO
Replace TA or check CN301
NO
Check the U302
NO
Check the U302
NO
Check the U301
NO
Solder again or change
2-4
R322
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