LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.19 Headset path
MSM6280 HPH_R, HPH_L -> C501/C502 -> Headphone AMP(U501) -> R502/R503
-> CN501 (MMI Connector)
Start
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
Can you hear the tone?
Change the Headset
YES
NO
END
Sine wave appears at
R502/R503?
Change the Main board
YES
NO
Check the Headphone Amp
Sine wave appears at
C501/C502?
YES
NO
Z3X-BOX.COM
Содержание CU720 Black
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