Headset Path - LG InTouch Lady Service Manual

4. TROUBLE SHOOTING

4.11 Headset path

QSC6270(3G disable) HPH_OUT_L_P/N
TP2_R504,R505 TP3_FB504, FB505
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out and insert headset.
Can you hear the tone?
Change the Main board
LGE Internal Use Only
TP1_C506,C507
J501(=3.5pi Ear-jack)
START
No
Sine wave appears at
TP_FB504, FB505
No
Sine wave appears at
TP2_R504, R505?
No
Sine wave appears at
TP1_C506, C507?
No
IC501(Audio Sub System)
Yes
END
Re-solder or Change J501
Yes
Change the Main PCB
Re-solder the FB504, FB505
Yes
Change the Main PCB
Yes
Change the IC501
- 70 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes