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Flow Chart of Troubleshooting
9-1-5. Microphone Part
Microphone does not work
Check the connection
from MIC
Check the circuit
from UCP300 to MIC
Check IFC500
Check the MIC
Yes
Yes
Yes
PIN 9
= ' H' ?
Yes
Yes
END
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No
Reconnect MIC
No
Resolder the
No
Check the JACK_IN signal
No
Replace the MIC
9-10
C408, C421, L400, L401
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