LG HB620 Service Manual

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4. TROUBLE SHOOTING
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.7.2 Voice path for headset
Voice path for Head_Set as below:
MSM6280 HPH_R, HPH_L → C841,C842 → #4, #5 pin of CN701 headset Jack
Start
The sine wave appear at
C841,C842 ?
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
And insert head_Set
NO
Can you hear the tone?
YES
YES
END
Headset insertion detection
in the Main LCD Display OK?
Check # 8 pin of CN701
or change the Main bíd
NO
YES
Check the CN701
or change the Main bíd
Start
The sine wave appear at
C841,C842 ?
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
And insert head_Set
NO
Can you hear the tone?
YES
YES
END
Headset insertion detection
in the Main LCD Display OK?
Check # 8 pin of CN701
or change the Main bíd
NO
YES
Check the CN701
or change the Main bíd
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LG HB620 Specifications

General

Brand	LG
Model	HB620
Category	Cell Phone
Language	English