SAMSUNG Proprietary-Contents may change without notice
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams
6-
3
4. Charging Part
5. Microphone Part
Abnormal charging part
Replace TA & Check the
CN303
END
Yes
check the pin #17,18
of CN303; -" TA+" is
>= 5V
Check the pin #4
of U601 ; low ?
No
No
Check the U601
Yes
Check the pin #3
of Q601 ; low?
No
Check the Q601
Check the pin #5
of U602 ; 3.2V ~
4.2V ?
No
Check the U602
Yes
Yes
M icrophone does not
work
check the soldering
status of microphone
Resolder microphone
Check the
reference voltage
on mic path
C444 = 1.5V
Resolder or Change
C477,C478,R427
Is microphone OK?
change microphone
END
Yes
Yes
Yes
No
No
No