- 107 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. Trouble Shooting
4.9.3 Microphone1 (Voice call),
Microphone2 (Speakerphone call, Voice Recorder, Video Recorder)
• Microphone Signal Flow
– MIC is enable by MIC Bias
– CCO1, MIC1P, MIC1N signals to AB3000
– CCO2, MIC4P, MIC4N signals to AB3000
• Check Points
– Microphone bias
– Audio signal level of the microphone
– Soldering of components
• Signal from the mic1
– MIC1
– CN100 on KEY FPCB
– CN521/522 on main board
– AB3000
• Signal from the mic2
– MIC
– C705/706 on Upper FPCB
– FB102/103 on Upper FPCB
– CN700 on Main FPCB
– FB503/505 on main board
– AB3000
To Next Page
Loading...
