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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.10 Audio trouble
4.10.1 Receiver path
Voice Receiver path as below:
MSM720A Ear_ON/Ear_OP
→
U503 (Audio Subsystem)
→
Speaker solder PAD
→
Speaker
Start
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
YES
Can you hear the tone?
YES
END
YES
Change t he Receiver
Hear the tone to the receiver?
NO
END
The sine wave appear
at C514, C515?
The sine wave appear
at Speaker Sold er pads ?
Check t he U503
NO
Содержание CT815
Страница 1: ...Date May 2009 Issue 1 0 Service Manual Model CT815 Service Manual CT815 Internal Use Only ...
Страница 165: ... 166 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 173: ... 174 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 177: ... 178 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 221: ...Note ...
Страница 222: ...Note ...