Headset Path - LG U370 Service Manual

4.15 Headset path

MSM6245 HPH_R, HPH_L → C402/C401 → R407/R406 → CN401 (MMI Connector)
Equipment and setup call Setup
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Start
Connect the phone to network
1KHz tone out and insert
headset
Can you hear the tone?
NO
Sine wave appears
at R405, R406?
NO
Change the Main board
4. TROUBLE SHOOTING
YES
END
YES
Change Headset
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LGE Internal Use Only