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SGH-Z320i Flow Chart of Troubleshooting and Circuit Diagrams
2-
7
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2-1-4. Charging Part
Check IFC200's pin #20,21
is around 5V when charging
Check the TA
Abnormal charging operation
END
YES
NO
Check TR400's pin#3
is "LOW" when charging
NO
Check U401's Pin #4
is "High" when charging
YES
YES
NO
Check the TR400
Check the U401
Check U400's Pin #5
is "LOW"
YES
Check the UCP100
NO