LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 107 -
4.16 Headset path
MSM6275 HPH_R, HPH_L
→
C102/C104
→
R200/R201
→
CON100(Earjack)
Start
Sine wave appears
at C102/C104 ?
Re-solder C102/C104
YES
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
NO
Can you hear the tone?
Change the Head_Set
YES
NO
END
Sine wave appears at
R200/R201?
Change the Main board
YES
NO
Summary of Contents for TU550
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
Page 185: ...Note ...
Page 186: ...Note ...