Microphone Part - Samsung SGH-B500 Service Manual

Flow Chart of Troubleshooting

10-1-4. Microphone Part

Microphone does not work
Is the assembled status of
Check the reference voltage on mic path
Yes
microphone O.K?
Yes
Yes
VR401 ≒ 2.0V ?
Yes
Is microphone ok?
Yes
END
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No
Reassembled the microphone
Resolder or change
No
R402,C401,C400,C402,R400,R405,
TA400,R401,C416,R415,C415,R417
No
Check UCD300
10-10
①
②