Samsung SGH-D410, Руководство по обслуживанию

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SGH-D410 Flow Chart of Troubleshooting and Circuit Diagrams
2- 5
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5. Microphone Part
6. Speaker Part
check the soldered
status of microphone.
Microphone does not work
Check the reference
voltage on mic path
C411 ≒ 2.5 V
Resolder microphone
Resolder or change
R413,C420,R414,C410,R411,R408
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check U701
Check the FPCB from
CN201 to CN11
Speaker does not work
Check the PIN 4 of
U401='High' ?
Retry connection the FPCB from
CN201 to CN11
Check U401 and the audio
path of U701
Is speaker ok?
Check componants near the U402
and control line of U402
END
No
Yes
Yes
Yes
Yes
No
No
Is speaker ok?
Change Speaker
Yes
No