Samsung SGH-P310 - Charging Part

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Flow Chart of Troubleshooting and Circuit Diagrams
9-8
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9-1-4. Charging Part
⑤
Abnormal charging part
Yes
The pin #19,#20 of
IFC400 is
VEXT
뵃
5V?
No
Replace TA,Check IFC400
①
②
Check the TR400
No
The pin #4 of TR400 is
"high"?
Yes
Yes
The pin #5 of U405 is
"low"?
Yes
The pin #8 of U406 is
3.2~4.2V?
Yes
The ISET=1.4V(during
charging) and <=0V(full
charging)?
Yes
END
No
Resolder or change R432
Check the U406
No
No
Check the U405,R431
③
④