Only For Training And Service Purposes - LG GT500 Service Manual

4.9.5. Headset MIC(Voice call, Video Telephony )
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
4
Check the signal level
at C505(TP8) at the putting
Audio signal in MIC
A few hundred of mV Of
the signal measured at
5
C505(TP8) ?
Change the main B'd
Does it work properly ??
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Only for training and service purposes

START
NO
2
YES
Does the Headset icon
display on the main LCD?
Change the main B,d
6
NO
YES
NO
YES
END
1
Does the level of R502
(TP1) under 0.5Volt ?
YES
Change the U501
Insert Headset.
NO
Resolder C505(TP8)
and try again.
If fail again,
Change the main B'd
Try again from the start
- 105 -
4. TROUBLE SHOOTING
NO
3
And try
Resolder R502(TP1)
`
again from the start
LGE Internal Use Only