LG MX8550 Service Manual page 108

MX8550
START
Insert 18 pin Headset to the 18pin Receptacle
or 4pole headset to 4pole earjack
YES
Does the audio profile of
the phone change to the headset
Mode?
YES
Set the audio part of the test equipment
to echo mode
YES
Can you hear your
voice from headset ?
YES
Headset will work properly
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Checking Flow
Checking Flow
NO
NO
Change headset
and try again
NO
Can you hear your
voice from headset ?
NO
YES
Set the audio part of the test
equipment to continuous wave mode
Can you hear the
Sound from headset ?
YES
: Headset detect
1
problem
: Headset receiving
2
NO path problem
: Headset sending
3
path problem
4
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