User Guide

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Flow Chart of Troubleshooting and Circuit Diagrams
10-14
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10-1-5.
Microphone Part
Microphone does not work
Check the soldering
status of KeyFPCB
Check the reference voltage on
mic path R410=2.8V
END
Change KeyFPCB
Resolder or Change
(
C309, R415, R414,V402,C426,C417,
V401,C410,R412,TA407,TA406,R410)
Check CPU301Is Microphone O.K?
YES
YES
YES
YES
NO
NO
NO
Check the assembled status of
microphone
Reassemble microphone
NO
YES