Checking The Operation Of Cpu; Checking The Audio Circuit - Elo TouchSystems ET17 XXL Series Service Manual

10.Checking the audio circuit

Is a cable with the host PC connected?
OK
Aren't the setups of the host PC a minimum
and
Off ?
OK
Is correct output waveform being inputted
from P002 pin 1,3 of the host PC ?
OK
Is the waveform which is the same as P002
being inputted to I004 pin 4, 9 ?
OK
Is output wavefrom being outputted in I004
pin
OK
Failure point
(1) Speaker cable disconnection.
(2) Speaker failure.
NG
NG
NG
NG
NG
Failure point
Audio cable disconnection.
Failure point
The setup of the host PC is changed.
Failure point
Audio cable disconnection.
Failure point
1.Printed wire broke between P002 pin 1,3 and I004 pin 4, 9.
2.R008,R009 open..
3.C013, C014 open.
Is 12V supplied to I004 pin 15,16?
OK
Failure point
I004 failure
- -
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