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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
2. TROUBLE SHOOTING
`YVXZ]
CHECKING FLOW
START
Resolder CN201
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 pin8 in CN201
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 R262, R263,
FB204, FB205 (Call)
or
Resolder R229,
C234,C236
or
Change the U205 & U102
Check TP5
in CN201 is LOW?
Resolder R262, R263
C261,C262 (Mp3)
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
2. TROUBLE SHOOTING
`YVXZ]
CHECKING FLOW
START
Resolder CN201
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 pin8 in CN201
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 R262, R263,
FB204, FB205 (Call)
or
Resolder R229,
C234,C236
or
Change the U205 & U102
Check TP5
in CN201 is LOW?
Resolder R262, R263
C261,C262 (Mp3)