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4. TROUBLESHOOTING
Checking Flow
START
Insert the earphone to the handset.
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 vioce
from the earphone?
4
Earphone will work Properly
Earphone receiving path problem
2
Level of C213 and C217
is about 1.2V
Yes
Check soldering
R204, R211, R214,
C213, C217, J201
Yes
Change
main board
Earphone detect problem
No
Audio path problem
No
Change the earphone and
try again.
Can you hear your voice
from the earphone?
Yes
Change Earphone.
No
Download
S/W
Re-soldering R204,
Not good
R211, R214, C213,
C217, J201
- 82 -
1
Set the audio part of the
test equipment to PRBS
or continuous wave mode
Can you hear the sound
No
from the earphone?
Earphone sending
path problem
3
Earphone receiving
path problem
No
2
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