1.No Touch Function On the Whole Touchscreen

Excluding the possibilities of incorrect connections of cables or either a defective RS232 port or USB port of the PC, we need to get the status of the controller LED. You can see the controller LED via the holes on the back cover or the shielding cover. The normal status should be:

1) When powering on the controller, the LED will increase in brightness for5~10 seconds and then the LED will go into the standby status, and will twinkle every 2 seconds;

2) When you touch the screen, the LED will brighten;

3) If you are not touching the screen, the LED will be dim;

4) After a significant period of time without touch, The LED will go back to the standby status and will twinkle every 2 seconds.

If the LED stays dim, the reason may be failures from the controller, from the communication cables, or from the wire board. To perform a swapping test is very helpful in confirming the failure. The possibility of defective communication cables or a defective wire board is relatively unlikely.

If the LED keeps twinkling every 2 seconds no matter whether a touch has been placed on the screen or not, the cause may be failures from the touch screen, from the communication cables, or from the wire board.

If the LED twinkles very fast, it indicates either that there may be a defective touch screen or controller, or that there may be a synchronization problem between the touch screen and the controller.

For the No Touch Function On the Whole Touch Screen problem, performing a swapping test is very helpful. For example, you can use an alternate controller to test the original touch screen. If its OK, the problem most likely lies with the original controller. If its still NG, you can use an alternate touchscreen to test. If the new touch screen resolves the problem, you can disassemble the original one and assemble the new touch screen onto the touchmonitor. If changing both the touch screen and controller does not help to solve the problem, you can check the cables and wire board although the chance of these being the root of the problem is relatively minor.

If the dead zone is in the middle of the touch screen, the problem is always caused by dust or stains accumulating on the edges of the touch screen or on the reflection stripes of the touch screen. For this kind of dead zone, the controller LED will not brighten when you touch the screen in the dead zone. The solution is to remove the front bezel and clean the touch screen and inside surface of the front bezel with alcohol and soft cloth. In the meantime, please pay attention to the dust-proof strips stuck onto the inside surface of the front bezel. Where there is a defective dust-proof strip, there would also be some gummy depositing onto the touch screen, which is the root cause of the dead zone. For such situations, the defective dust-proof strips must be replaced.

If the dead zone is on the edges and the controller LED does not brighten when you touch the screen in the dead zone, the solution is the same as above.

If the dead zone is on the edges but the controller LED brightens when you touch the screen in the dead zone, the problem most likely lies with the calibration. If this is the case, please kindly go into the touch driver control panel and re-calibrate the touch screen carefully.

You can adjust the sensitivity level in the touch driver control panel. Level 4is the recommended level.

If the cursor always goes to the positions which are different from the points touched, it is known as a drifting problem. There are two kinds of drifting phenomena, as stated below:

1)If the drifting of the cursor is regular, this kind of problem can be solved by calibration.

2)If the drifting of the cursor is irregular, it seems that there is some interference around the touch system. Please try to adjust the sensitivity level to a lower one to solve such a problem.

The touch screen requires very little maintenance. General Touch recommends that you periodically clean the touch screen surface. Typically, an isopropyl alcohol and water solution ratio of 50:50 is the best cleaning agent for the touch screen. You can also use straight isopropyl alcohol or any other neutral proprietary glass cleaner. Using a non-neutral cleaner may corrode the surface layer with special treatment and consequently cause it to lose the ability to perform its function. If the cleaner enters into the area containing the reflection stripes, they may be corroded and ultimately the touch function will be affected.

Please apply the cleaner with a soft, lint free cloth. Always dampen the cloth and then clean the screen. Be sure to spray the cleaner onto the cloth, not the screen. This method is helpful in controlling the cleaner consumption. If the cleaner is sprayed onto the touchscreen directly, it is easy to spray too much cleaner, and then the cleaner, combined with dust and dirt, will seep into the area containing the reflection stripes through the gap between the front bezel and the touch screen, and therefore will affect the touch function.