How to solve the five common problems of touch screens?

Fault symptom 1:

1. Phenomenon description: Touch does not respond, click on the screen cursor and it does not move.

2. Reason analysis:

① Is the driver installed correctly;

② Whether the connection line between the touch screen and the touch card is normal;

③ Whether the connection line between the touch card and the mainboard is normal;

④ Whether the touch screen or touch card is damaged or abnormal;

⑤ Is there any error message in the operating system (Windows);

⑥ Is there any hardware or software conflict or incompatibility between the operating system (Windows) and the touch screen.

3. Solution:

① Install the driver correctly, and pay attention to two points: one is to remove the RS232 interface option during the installation of the resistance screen driver (see the manual for details), and the other is that the capacitive screen does not require manual installation of the driver, and the operating system (Windows) will automatically recognize it;

② Check whether the connection line between the touch card and the built-in USB plug on the motherboard is normal. Re plug or replace the line to test, but pay attention to the correct position and direction of the plug to avoid circuit burning;

③ Check whether the connection line between the touch screen and the touch card is normal. Re plug or replace the line to test, but pay attention to the correct position and direction of the plug to avoid circuit burning;

④ Check if the touch screen or touch card is damaged, replace the touch screen or touch card for testing;

⑤ If an error message appears in the operating system (Windows), you can choose to replace another host or reinstall the operating system;

⑥ When there is a hardware or software conflict or incompatibility between the operating system (Windows) and the touch screen, please replace the operating system version.

SIEMENS 6AV6643-0CD01-1AX1 Touch Panel

Fault phenomenon 2:

1. Phenomenon description: The touch position and display cursor position are different (deviated or reversed, or the main and secondary screens are reversed).

2. Reason analysis:

① Whether incorrect calibration has been carried out;

② The resolution of the display was changed without calibration;

③ Is there any electromagnetic interference from other high-frequency devices on the current touch card;

④ The touch screen or touch card may be damaged or abnormal;

3. Solution:

① To calibrate a resistive touch screen, it is necessary to first clear and calibrate it using the driver program, and then use a linear setting of 9 or 25 points to accurately calibrate it. At the same time, it should be noted that when making calibration settings, the eyes must be perpendicular to the calibration point on the screen, and then use a touch pen to click on the center point; In general, capacitive screens do not require calibration operations. First, check whether the connection between the touch screen cable and the touch card is loose or skewed. After power off, reconnect correctly. If manual calibration is required, open the Tablet PC in the control panel, click on calibration, and follow the prompts on the screen to calibrate;

② Recalibrate at the new resolution (calibration method as above);

③ Replace the connection cable between the touch card and the motherboard (you can choose a cable body with a magnetic ring and pay attention to the correct plug direction and position), or move the touch card to a place with less interference for testing;

④ Replace the touch screen or touch card before testing.

6AV6643-0BA01-1AX0 SIEMENS Touch Screen

Fault phenomenon 3:

1. Phenomenon description: The cursor is fixed at a certain point on the screen

2. Reason analysis:

① Whether incorrect calibration has been carried out;

② The touch screen is installed too tightly or with deviation, and the outer frame is pressed inside the touch area;

③ The touch screen or touch card may be damaged or abnormal.

3. Solution:

① Perform correct calibration again (the same method as fault 2 ①);

② Adjust the tightness of the screen border appropriately or reinstall the touch screen;

③ Replace the touch screen or touch card before testing.

Allen-Bradley 2711P-T15C21D8S Terminal

Fault phenomenon 4:

1. Phenomenon description: No response in a certain area of the touch screen

2. Reason analysis:

① Whether incorrect calibration has been carried out;

② Whether it matches the current drive;

③ The screen may be damaged or abnormal.

3. Solution:

① Perform correct calibration again (the same method as fault 2 ①);

② Uninstall the incorrect driver, restart, and then install the correct driver (see instructions for installation methods);

③ Replace the touch screen or touch card before testing.

Beijer Mac Mta E700 Panel

Fault phenomenon 5:

1. Phenomenon description: The cursor jumps on the screen

2. Reason analysis:

① Is the current touch card experiencing excessive temperature or electromagnetic interference from other high-frequency devices;

② The power supply of the touch card is unstable;

③ The touch screen or touch card may be damaged or abnormal.

3. Solution:

① Replace the connection cable between the touch card and the motherboard (you can choose a cable body with a magnetic ring and pay attention to the correct direction and position of the plug), or lower the temperature of the touch card or move it to a place with less interference for testing;

② Replace the power adapter or better quality plug;

③ Replace the touch screen or touch card before testing.

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