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MX8550
Setting: After initialize 5515C,and then test handset.
START
YES
Check the voltage of R538
Whether its range is 1.2~1.5V
YES
Check the signal level at
Each side of MIC
YES
Check the signal level at R210
YES
Check the soldering at C207, C208
YES
Check the soldering of MIC network
YES
MIC will work properly
LG Electronics Inc.
Checking Flow
Checking Flow
Check the soldering at
R538
NO
YES
Resolder U501
NO
Resolder MIC
NO
Resolder C207, C208
NO
Resolder MIC network
NO
Replace MSM or Main B/D
NO
Resolder R538
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