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Troubleshooting Information for Capacitive Single-touch Type


Damage caused by static electricity.
Make sure to ground the screw holes on the sensor side of the controller board. It is resistant to static electricity up until 27kV.
Please refer to notes for installation.
Touch position drift.
  • Perform calibration.*1 Drift may occur if the surrounding environment changed.
  • Ground the metal materials in the structure.
  • Adjust sensitivity of the sensor on the driver screen.
  • The gap between the sensor and the LCD may not be sufficient. Make the gap greater than 0.7mm.
  • Make sure that the tail is fixed.
  • Do not touch the touch screen during startup (until the LED on the controller board lights up twice) because the controller board is checking the surrounding environment.
  • Make sure that there are no scratches on the surrounding pattern. Scratches on the pattern may cause drift.
  • Make sure that the tail is not becoming detached or damaged. Touch screen will not work at all in these cases.

*1 Calibration ... Task to correct the touch positions by driver software.

Does not work at all.

Does the LED turn on during bootup?
->No, LED is not turned on.
   Check if polarity of the power is correct. Check if the applied voltage is correct.
->Polarity of the power is correct. Correct Voltage is applied.
   Check if the short plug board number is correct.


->Short plug board number is correct.
   The touchscreen and/or controller may be broken.

-> Yes, LED is turned on.
   Check if the short plug board number is correct.


-> Short plug board number is correct.

1) Does the LED flicker upon touching the panel?
a) No, the LED does not flicker.
The touchscreen may not be installed properly, or may be broken.
b) The LED is continuously on.
The touchscreen may not be installed properly, or may be broken.
c) the LED flickers.
There must be communication problem.

2) Is the correct communication cable being used?

3) Is the driver software installed properly?

4) Was it rebooted after installation of the driver software?
If the touch screen comes with a back shield, check if the back shield is grounded or not.
(Back shield*2 is supposed to be connected to the shield line of the controller board.)




*2 Touchscreen with back shield ... Touchscreen with coating on the backside that will improve signal stability.
Smoke and/or strange smell being emitted.
  • Check if polarity of the power is correct. Check if the applied voltage is correct.
  • Check if somewhere on the controller board is shorting out (check the backside as well).
  • Make sure that power is not supplied to both USB terminal and supply terminal.
  • Make sure that the unit is properly grounded. Make sure that it is not connected to another power supply.