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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.10 Receiver Path
QSC6270(3G disable) EAROP(EARON) Æ TP1_CN801(Main to Slide FPCB Connector) 2,3 PIN
Æ TP2_CN103(=Slide FPCB to Main PCB Connector) 2, 3 PIN Æ TP3_FB101, FB102(of F_SLIDE_ FPCB)
TP4_CN101(= Receiver Pad of F_SLIDE_ FPCB )
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Can you hear the tone?
END
Yes
No
Change the QSC6270
Change the Main PCB
The sine wave appears at
Receiver Pad(TP4)
Re-Solder Receiver
Change the Receiver
Yes
No
START
The sine wave appears at
TP3_FB101, FB102?
Change F_SLIDE_FPCB
Yes
No
The sine wave appears at
TP2_CN103 2,3 PIN?
Re-Solder FB101,FB102
Change F_SLIDE_FPCB
Yes
No
The sine wave appears at
TP1_CN801 2,3 PIN?
Re-Connect CN103
Change F_SLIDE_FPCB
Yes
No