Headset Path - LG TU550 Service Manual

4.16 Headset path

MSM6275 HPH_R, HPH_L → C102/C104 → R200/R201 → CON100(Earjack)
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
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Only for training and service purposes
Start
Can you hear the tone?
NO
Sine wave appears at
R200/R201?
NO
Sine wave appears
at C102/C104 ?
NO
Change the Main board
4. TROUBLE SHOOTING
YES
YES
Change the Head_Set
YES
Re-solder C102/C104
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END
LGE Internal Use Only