How to repair and clean LED display

The general led mirror screen inspection adopts the “monthly inspection system”, and the maintenance of large LED display screen implements the “weekly inspection system”. The specific maintenance content and response speed commitment are as follows:

1. LED display screen maintenance, including lamp tube, module, module, power supply, control card;

2. LED display control system maintenance, including controller, optical fiber conversion card, distributor, sending card;

3. LED display special play operation software, including maintenance and upgrade of playback software;

4. Regular (once a month) technical personnel on-site inspection, inspection and maintenance of the system;

5. Guarantee of major activities: the company’s technical personnel guide to ensure the smooth development of field activities.

6. For outdoor LED screen, the damage caused by wind, rain, thunder, electricity and other natural factors is not covered by the warranty. The owner shall take out insurance from the insurance company, and the insurance company shall make compensation.

7. During the maintenance service period, the maintenance problem should be solved within 8 hours for general faults, and 24 hours for major accidents. Repair to replace modules and other accessories, not more than 24 hours. If the first level of the module is not normal, such as the maintenance module is not bright, the service module is not normal.


For the display screen with lower protection level, especially the outdoor screen, dust in the atmosphere enters the equipment through the ventilation hole, which will accelerate the wear and even damage of the fan and other equipment. Dust will also fall on the surface of the internal control device of the display screen, which will reduce the thermal conductivity and insulation performance. In case of wet weather, the dust will absorb moisture in the air and cause short circuit; for a long time, it can also cause the mildew of PCB board and electronic components, resulting in the decline of the technical performance of the equipment and the failure. Therefore, the cleaning work of LED display screen seems simple, in fact, it is a very important link in the maintenance work.


LED display screen belongs to high power consumption equipment. After running for quite a period of time, due to multiple start-up, shutdown and operation, the wiring terminals of the power supply part will become loose due to cold and hot, loose contact, and form a virtual connection. In serious cases, it will generate heat and even ignite the plastic components nearby. Signal terminals will also be loose due to the change of ambient temperature and humidity, resulting in poor contact, which will lead to equipment failure. Therefore, the connectors of LED display screen must be fixed regularly. When adjusting fasteners, the force should be uniform and appropriate to ensure firm and effective.

The surface of the display screen is clean

The LED display screen is visually inspected and checked in two states of bright screen and black screen. It includes: whether the surface of display screen is polluted, the purpose is to remove the influence of surface dirt on the luminous characteristics; whether there is damage and crack on the display surface; whether the communication distribution cable line is normal; for the equipment with high protection level, although the components and connectors with high reliability are selected, its airtightness becomes the key factor, therefore, it is necessary to regularly check the integrity of the seal; For the outdoor screen steel structure, the surface paint and corrosion should be checked; for the indoor and outdoor screen surface pollution is particularly serious, the display surface should be cleaned.

LED display screen cleaning belongs to high-altitude operation, and professional cleaning team is required. The cleaning operation adopts high-altitude hanging rope (commonly known as spider man) or hanging basket, and is equipped with professional cleaning equipment. According to the different dirt on the screen, the cleaning personnel select different cleaning agents to clean the LED display screen, so as to ensure that the LED display screen can be cleaned without damaging the LED lamp tube and mask.

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