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6 maintenance methods for LED liquid crystal display

Views: 269     Author: Wendy     Publish Time: 2023-06-28      Origin: Site


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6 maintenance methods for LED liquid crystal display

LCD panels are highly popular right now. While many homeowners have immediate LCD screens, some continue to utilize outdated black and white TVs.

Modern LCD screens are beautiful, but you are aware of improved maintenance practices. For each model, maintenance procedures will undoubtedly differ.

1.The LCD display is firmly anti-static.

The control and drive circuits of the module are low voltage, low power, and readily damaged by static electricity CMOS circuits. Attention must be taken to electrostatic breakdown, an irreversible injury. Therefore, handling, assembly, and use should be done with the utmost care, and static electricity should be rigorously avoided. To achieve this:

The soldering iron used in welding needs to be tightly grounded and leak-free;

If the LCD screen must be connected directly, the human body and the module should be properly grounded, or the console's metal frame or faucet should be touched with a hand to release static electricity;

Avoid arbitrary contact with circuits, ICs, and external leads on circuit boards.

2. Carefully handling the LCD film

Before the entire machine is put together, the protective film that is connected to the surface of the constructed module should not be removed to prevent contamination or damage to the display surface. This film prevents the display surface from being contaminated during the assembly process.

3. Put the LCD screen gasket in place

In order to prevent distortion after assembly, it is preferable to put a spacer of approximately 0.1mm between the module and the front panel, which should also be kept flat.

Fourth, the interface circuits and leads for LCD screen welding should be done in line with the rules.

Avoid letting solder drop onto the LCD screen's circuit board while soldering, since this could cause an abnormal short-circuit display on the screen;

Eutectic, low melting point welding material; soldering iron temperature: 280°C; welding time: less than 4 seconds; maximum number of repetitions: 3;

Please confirm that the LCD module has passed the quality inspection in advance if the connection between the LCD module and other peripheral circuits requires welding or the replacement of the original connector;

Avoid physically damaging the LCD screen and PCB since if you do, it won't be able to be fixed.

4. Issues that must be addressed during the LCD screen assembly process

In order to shield against electromagnetic interference and outside noise, the installation hole must be grounded;

The shape, assembly holes, circuits, and components of the PCB, as well as the conductive adhesive strip, may not be changed arbitrarily, nor may the metal frame be bent or dismantled at whim.

Do not touch, drop, bend, or twist the module and backlight components, or any other internal supports of the LCD panel.

Please do not modify or tamper with the LCD module at will since it has been thoughtfully developed and put together.

5. LCD screen storage over a long period of time

Place it in a dark area to avoid harsh light, seal a plastic bag over it (ideally one with an anti-static coating), and never push anything against the surface. Liquid crystal polarizers, which are sensitive to high temperatures and humidity, must never be stored in such settings.

6. LCD module use and maintenance

If the external leads of the liquid crystal module are connected incorrectly, overcurrent and overvoltage could harm the liquid crystal module's components;

The display response is slow when the module is used below the defined working temperature range, and the complete display surface will once more be exhibited in full display mode when the module is used above the specified working temperature range.

As long as it returns to the appropriate temperature range, there is no module damage and everything will return to normal.

Only after the positive power supply (50.25V) is securely attached can the signal level be entered when the module is connected and disconnected. Circuits such as ICs in the module may be harmed if the signal level is input either before or after the power supply stabilizes;

The temperature and driving voltage have a significant impact on the contrast ratio and viewing angle of the dot matrix liquid crystal display module. Consequently, if the VEE is set too high, it will not only have an impact on the display but also reduce the module's service life;

Wipe off water stains on the screen as soon as they appear: Continual exposure to water droplets will result in color or spot changes on the screen;

To avoid a short circuit between neighboring pins, avoid hitting the IC on the PCB on the back of the module;

A strange display will result by aggressively pressing the display component. At this point, turn off the power supply, wait a little, and then turn it back on so that everything goes back to normal;Wipe the LCD screen with a soft cloth or absorbent cotton as soon as there are stains on it.




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