LG KP260 Service Manual page 72

CHECKING FLOW
START
Resolder J200
Check TP1 voltage. Is it low?
YES
Is TP2 Voltage level
LOW?
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
ResolderCN300
NO
Resolder TP2
NO
Change the earphone
and try again
NO
Change the earphone
and try again
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4. TROUBLE SHOOTING
NO
Can you hear
the sound from
the earphone?
YES
NO
Can you hear your
voice from
the earphone?
YES
Resolder TP3
OR Change the IC200
Resolder TP4
Or Change the U103
LGE Internal Use Only