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5-5 Microphone Part
Microphone does not work
EAR400 pin 4, 5 = short?
U102 pin 5 (AVCC)
Check the circuit
RC Filter to MIC1
Check the tension of MIC Module
5-9
Yes
Yes
2.5V?
Yes
Yes
Yes
END
No
Resolder EAR400
No
Check the circuit related to U102
No
Resolder the
R422,R423,R423,R429,
C415,C417,C416,C420
No
Replace the Mic or Mic Holder
Flow Chart of Troubleshooting and Circuit Diagrams
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