Table of Contents
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Earphone detect problem
1
Change the earphone and then
insert to the handset
Level of pin 5 of CON402
is less than 1.4V?
No
Check soldering
the CON402
Yes
Change the main board or QSC
Does the audio
Yes
Profile of the phone change to
the earphone mode?
No
Re-download software
Yes
4
Does it work well?
No
Re-solder or replace CON402
Yes
4
No
Replace QSC
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