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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
4.10.4. Headset Receiver (Voice call, Video Telephony,MP3 )
START
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Insert Headset.
Does the Headset icon display
on the main LCD?
Can you hear sine wave
out of the receiver ?
Change the main Bíd
END
YES
YES
YES
YES
NO
NO
NO
Does the level of R429
under 0.5Volt ?
NO
Does the level of R429
over 2.0Volt ?
YES
N0
Change the main B,d
YES
Does the sine wave appear
at C643,C644 ?
NO
Does the sine wave appear
at R679,R680 ?
Resolder CN400 Pins
or change the Headset
1
2
6
3
7
Resolder R603,R605
And try again from the start
4
Does the sine wave appear
at C641,C642 ?
5
YES
Change the the U604
NO
Change the main B,d
Содержание KU580
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