LG -C300 Service Manual page 90

CHECKING FLOW
START
Check the
Display on ear-jack
detect icon
YES
Set the audio part of the
test equipment to PRBS
or Continuous wave mode
Can you hear
the sound from
the earphone?
YES
Set the audio part of
the test Equipment
to echo mode
Can you hear
Your voice from
the earphone?
Earphone will
work properly
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Only for training and service purposes
NO
Resolder J201
Change the
NO
earphone
and try again
Change the
NO
earphone
and try again
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4. TROUBLE SHOOTING
2. TROUBLE SHOOTING
Can you hear
NO
the sound from
the earphone?
YES
Can you hear
NO
Your voice from
the earphone?
YES
Resolder
FB205,FB206
C210,C209
(Call, MP3)
Resolder
C255,C256
or Change the
U202 & U101
LGE Internal Use Only