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Flow Chart of Troubleshooting
9-6
9-4. Microphone Part - Phone MIC
Phone MIC does not work
Yes
Not OK
Check the connection
of MIC
Solder MIC again
Yes
Replace MIC
OK
Is Phone MIC working?
OK
Solder TA401, R405, R406 and R407
again
Check the components
which are connected to
MIC_BIAS_2.15V
Solder C401,C402, C404, C405, L401,
L402, L403, L404 and R402 again
Check the circuit
of MIC PART
OK
END
Solder R325 again and check U300
Check MIC_BIAS_2.15V
( When UCP200 operates
and call is connected )
Not OK
Not OK
No
Not OK
OK