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Touch Screen Fault Judgment And Exclusion
Dec 15, 2017

First, analysis and treatment of the fault phenomenon of the surface acoustic wave touch screen

Fault 1: touch deviation

Phenomenon: the position of the finger does not coincide with the mouse arrow.

Analysis: after the installation of the driver, in the correct position, there is no vertical touch target center position. Processing: recalibrate the position.

Fault two: touch deviation

Phenomenon: part of the area of touch is accurate, part of the area of touch is biased.

Analysis: surface acoustic wave touch screen four on the periphery of the acoustic reflection stripes on the area accumulated a lot of dust or scale, which affected the transmission of acoustic signals.

The way of cleaning is to clean the touch screen. We should pay attention to cleaning the acoustic reflection stripes on the four sides of the touch screen. When cleaning, we should disconnect the power of the touch screen control card.

Fault three: touch no response

Phenomenon: there is no action on the mouse arrow when you touch the screen, and there is no change of position.

Analysis: the cause of this phenomenon is a lot of reasons, the following one by one:

(1) the dust or dirt accumulated on the acoustic reflection fringes on the surface of the surface acoustic touch-screen four is very serious, causing the touch screen to be unable to work.

(2) the touch screen is malfunction.

(3) the touch screen control card has a failure.

(4) a fault of the touch screen signal line.

(5) the serial port of the computer is malfunction.

(6) failure of the operating system of the computer.

(7) the touch screen driver installed the error.

Two. Analysis and processing method of fault phenomenon of resistance touch screen

Fault 1: touch deviation

Phenomenon: the position of the finger does not coincide with the mouse arrow.

Analysis: after the installation of the driver, in the correct position when no vertical touch target center position. The signal line on the touch screen is in contact with bad or circuit breakers.

Processing: recalibrate the position; look for breakpoints to reconnect or replace the touch screen.

Fault two: touch deviation

Phenomenon: when the mouse is not touched, the mouse arrow always stays in a certain position. When touch, the mouse arrow is at the middle point of the touch point and the original stop point.

Analysis: there is a foreign object (non - active touch) in the effective working area of the oppressed resistance touch screen.

Treatment: remove the foreign objects in the effective working area of the oppressed resistance touch screen.

Fault three: touch no response

Phenomenon: there is no action on the mouse arrow when you touch the screen, and there is no change of position.

Analysis: the causes of this phenomenon are explained by the following:

(1) a touch screen failure

(2) the touch screen control card has a failure.

(3) a fault of the touch screen signal line.

(4) the serial port of the computer is malfunction.

(5) failure of the operating system of the computer.

(6) the touch screen driver installed the error.