Table of Contents
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Checking Flow
SETTING : After initialize 5515C, Test US Cellular
START
Voltage at R434 = 1.2V?
(MIC BIAS Voltage Check)
Yes
Check the signal level
At each side of MIC. Is
It a few tens mVAC?
Yes
Check the soldering of
C439, C440
Yes
Check the soldering of
MIC Filter Part
Yes
MIC will work properly
No
Check the soldering
Of R434
Replace MSM
No
Replace the microphone
No
Re-solder C439, C440
No
Re-solder MIC Filter part
No
Re-solder R434
Yes
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