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