Only For Training And Service Purposes - LG GD580 Service Manual

4. Trouble Shooting
4.9.4 Headset Receiver (Voice call, Video Telephony, MP3 )
1
1
2
LGE Internal Use Only
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?
YES
Does the sine wave appear
at C464(TP1),C465(TP2) ?
YES
Does the sine wave appear
at C462(TP3),C463(TP4) ?
YES
Does the sine wave appear
at FB602(TP6), FB603(TP7)
Resolder CN601 Pins
or change the Headset
Can you hear sine wave
out of the receiver ?
YES
END
NO
change the Headset
or the main B'd
NO
Change the main B,d
NO
Change the main B,d
NO
Change the main B,d
?
NO
Change the main B,d
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Only for training and service purposes