Elo TouchSystems IntelliTouch Ultra, Product Manual, Page: 72 / 105

Hardwar Hardware Troubles e Troubleshooting hooting
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wave signal. This could be caused by the display bezel being in contact with the wave signal. This could be caused by the display bezel being in contact with the
touchscreen, especially on the reflectors. Mounting tape on the reflectors or
touchscreen, especially on the reflectors. Mounting tape on the reflectors or
transducers, or severe accumulations of dirt around the edge of the touchscreen,
transducers, or severe accumulations of dirt around the edge of the touchscreen,
especially on the reflectors, can also produce significant signal attenuation.
especially on the reflectors, can also produce significant signal attenuation.
Broken cables and transducers can also be deduced from analyzing test point #1; Broken cables and transducers can also be deduced from analyzing test point #1;
the symptom is usually a total absence of the indicated waveform. Although the the symptom is usually a total absence of the indicated waveform. Although the
absence of this waveform could be due to other causes, the most likely cause is a absence of this waveform could be due to other causes, the most likely cause is a
bad touchscreen or cable.
bad touchscreen or cable.
Figure A-2. Typical Receive Waveform Figure A-2. Typical Receive Waveform
IC1 Cable IC1 Cable
The IC1 cable is used inside the display to connect to an external EC2 extension The IC1 cable is used inside the display to connect to an external EC2 extension
cable and an external controller. The IC1 cable can be checked with an ohmmeter.
cable and an external controller. The IC1 cable can be checked with an ohmmeter.
Pin #1 is identified by a white dot on the plastic body of the header. The pinouts
Pin #1 is identified by a white dot on the plastic body of the header. The pinouts
for the header and the cable are as follows:
for the header and the cable are as follows: