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SGH-E300 Flow Chart of Troubleshooting and Circuit Diagrams
2-
3
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4. Charging Part
Check the pin 17, 18
of CN300 is
TA_VEXT>4?
Abnormal charging part
Check the pin 2 of
Q102 is "low"?
Replace TA,Check CN300
Check the Q102
Check the Q100
END
No
Yes
Yes
Yes
Yes
No
No
Check the pin 3 of
Q100 is "low"?
Check the pin 5 of
Q102 is "3.2~4.2V"?
Check the Q102
No
Yes
Check the ICHRG is
1V(during charging)
and around 180mV(full
charging)?
No
Resolder or change R102
Yes
