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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
BL20
46/53
4.17 Headset path
R6,R7
Æ
IC500(Audio Sub System)
Æ
R408
Æ
IC400(MUIC)
Æ
CN400 (u USB Connector)
Start
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
Can you hear the tone?
Change Audio Sub System
YES
NO
END
Sine wave appears at
R6,R7
Change the Main board
YES
NO
Sine wave appears at
R408?
Check the MUIC
Change the Main board
YES
NO
Содержание BL42k
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