Table of Contents
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5-5 Microphone Part
Microphone does not work
the connection
from J403 pin 3, 4
U413, U415 pin 2 (AVCC)
Check the circuit
from U414 to U413, U415
Check the Key PCB
5-5
Yes
Check
Yes
3.0V?
Yes
Yes
Yes
END
No
Resolder J403 pin 3, 4 and
D413, D414
No
Check the circuit related to U308
No
Resolder the R444, R445, R446,
R447, C446, C450 and C451
No
Replace the Key PCB
Flow chart of trouble shooting
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