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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 100 -
4.15 Headset path
MSM6280 HPH_R, HPH_L
→
C302/C303
→
R300/R302
→
CON300(Earjack)
Start
Sine wave appears
at C302/C303 ?
Re-solder C302/C303
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
R300/R302?
Change the Main board
YES
NO
Summary of Contents for CU405
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model CU405 Service Manual CU405 Internal Use Only ...
Page 175: ...Note ...
Page 176: ...Note ...