SETTING : After initialize 5515C, Test US Cellular
START
Voltage at R440 = 1.2V?
(MIC BIAS Voltage Check)
Check the soldering
Of R440
Re-solder R440
Replace MSM
Check the signal level
At each side of MIC. Is
It a few tens mVAC?
Replace the microphone
Check the soldering of
C450, C451
Re-solder C450, C451
Check the soldering of
MIC Filter Part
Re-solder MIC Filter part
MIC will work properly
Checking Flow
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
38
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Summary of Contents for LG-MC2670
Page 17: ...LG MC26 70 DCN Mode Graph 2 1 2 1763 04MHz DCN384 14 Z 3 X B O X C O M ...
Page 21: ...LG MC2670 Waveform DP101 Pin 5 Graph 2 1 4 c DP101 Pin 8 Graph 2 1 4 b 18 Z 3 X B O X C O M ...
Page 32: ...LG MC2670 Circuit Diagram 29 Z 3 X B O X C O M ...
Page 55: ...LG MC2670 Appendix Z 3 X B O X C O M ...
Page 56: ...Z 3 X B O X C O M ...
Page 58: ...Z 3 X B O X C O M TX Line RX Line Local Line RD2670 ...
Page 59: ...Z 3 X B O X C O M TX Line RX Line MIC Line SPK Line RD2670 ...
Page 60: ...Z 3 X B O X C O M RD2670 ...
Page 61: ...Z 3 X B O X C O M SPK Line MIC Line RD2670 ...
Page 65: ...Description LG Part No Q ty MAIN PCB SPFY0083001 1 2 PCB Z 3 X B O X C O M ...