LG GT500 - Page 104

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4. TROUBLE SHOOTING
4.9.5. Headset MIC(Voice call, Video Telephony )
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
NO
Does the level of R502
(TP1) under 0.5Volt ?
NO
Resolder R502(TP1)
And try
again from the start
YES
1
NO
Change the U501
Insert Headset.
Does the Headset icon
display on the main LCD?
YES
2
`
3
Does it work properly ?? Try again from the start
END
YES
YES
NO
NO
Change the main B’d
Check the signal level
at C505(TP8) at the putting
Audio signal in MIC
Resolder C505(TP8)
and try again.
If fail again,
Change the main B’d
A few hundred of mV Of
the signal measured at
C505(TP8) ?
4
5
6
Change the main B,d