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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 104 -
4.17 Main microphone
MIC300
→
C323,C324
→
MIC1P,MIC1N(MSM6280)
Start
MIC_BIAS(C313 or C320)
is 1.8V
Change main board
NO
Make a call
Change the MIC
NO
YES
Change the Main board
Make sound to MIC
Work well?
END
YES
NO
YES
Sine wave appears at
C323,C324 ?
Summary of Contents for CU405
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model CU405 Service Manual CU405 Internal Use Only ...
Page 175: ...Note ...
Page 176: ...Note ...