Table of Contents
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5-5 Microphone Part
Microphone does not work
from CN211 pin 16, 17
U502, U503 pin 2 (AVCC)
from U501 to U502, U503
Flow chart of trouble shooting
Yes
Check
the connection
Yes
3.0V?
Yes
Check the circuit
Yes
Check the Key PCB
Yes
END
No
Resolder CN211 pin 16, 17
No
Check the circuit related to U105
No
Resolder the R525, R527, R530, R531
C553, C532 and C538
No
Replace the Key PCB
5-9
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