
4. TROUBLE SHOOTING
- 93 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.16 Headset path
QSC6270 HPH_OUT_R, HPH_OUT_L -> M500 (Audio Sub System) ->
HS_OUT_L ( TP1 ) , HS_OUT_R ( TP2 ) -> headset
START
Change the Headset
Change the User’s Headset
Sine wave appears at TP1, TP2 ?
Yes
Change the Main board
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset working well.
Change Audio subsystem (M500)
No
No
No