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Checking Flow
START
Insert the earphone to the handset.
Yes
Does the audio
Profile of the phone change to
the earphone mode?
Yes
Set the audio part of the test
equipment to echo mode
Yes
Can you hear your voice
from the earphone?
Yes
4
Earphone will
work properly
SETTING : After initialize 5515C, Test US Cellular
Earphone detect problem
Audio path problem
No
Change the earphone and
try again.
Yes
Can you hear your voice
from the earphone?
Yes
Change Earphone.
Earphone receiving path problem
Level of C430
is about 1.2V
Check soldering of
Pin 3 of CON401
Change
main board
No
Set the audio part of the
test equipment to
continuous wave mode
Yes
Can you hear the sound
from the earphone?
No
Yes
3
2
No
Download
Yes
No
Re-soldering of
Pin 3 of CON401
Yes
1
Earphone receiving
Path problem
No
2
Earphone sending
path problem
S/W
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