4. TROUBLE SHOOTING
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Only for training and service purposes
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ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
CHECKING FLOW
START
Resolder J201 (
3.5
Ɋ
Ear-Mic con)
YES
Earphone will
work properly
Can you
hear your voice
From the
earphone?
Set the audio part of the test
Equipment to echo mode
Change the
earphone
and try again
NO
Can you hear
the sound from
the earphone?
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
YES
YES
Resolder J201
NO
YES
Can you hear
the sound from
the earphone?
NO
Change the
earphone
and try again
NO
Can you
hear your voice
From the
earphone?
NO
Resolder
L203,L204,FB204,
FB205, C245,C246
Resolder
FB203,R226,R218,
C238,C256,C240,
C241, C242
Or change the
U202(amp),
U102(BB IC)
Can you
hear the sound from
The earphone?