Table of Contents
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Checking Flow
Does the audio profile
of the phone change to
the earphone mode ?
YES
YES
Check voltage level of
TP6 VMIC = 2.5V?
YES
Check component
status around VMIC
YES
Check the signal level and
HS_MIC . Is it about
1.2~1.5VDC with a few
tens mV AC ?
Replace U101(EGV) or Change
another Ear-Mic set and Try again .
Start
MIC
NO
YES
NO
Check U101(EGV)
NO
Re-solder or replace the
component
NO
Re-solder causal
component(J501)
65
Earphone
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