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Check connected Properly?
Is the TP2 (JACK DETECT)
Set the test instrument or
Earphone working well
LGE Internal Use Only
START
Yes
LOW?
Yes
Play Continuous wave
Can you hear
the sound?
Yes
Set the test instrument
to echo mode
Can you hear
Your voice?
Yes
No
Please, Reconnect The earphone
No
Check the state of soldering TP1
No
Change the earphone and try again
No
Change the earphone and try again
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4. TROUBLE SHOOTING
Only for training and service purposes
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