The maintenance methods of LED display screen are mainly divided into FRONT maintenance and BACK maintenance. Back maintenance is widely used in large LED display screens of building exterior walls. So maintenance channels need to be designed,so that maintenance personnel can carry out maintenance and overhaul from back of the screen, which is characterized by high overall technical requirements, cumbersome installation and disassembly, time-consuming and labor-consuming. However, it is obviously not a suitable choice for indoor compact application places where space is scarce, or foe embedded and wall-mounted structures. With the development of small-pitch LED screen, the front maintenance indoor LED display products gradually dominate the market. It means that the magnetic element is fixed with the LED display cabinet by magnet, and the sucker directly contacts the cabinet surface for front maintenance during operation, so that the module structure of the LED screen can be removed from the cabinet then the maintenance can be realized. This front maintenance method can make the whole structure of the display screen thinner and lighter, integrate with the surrounding building environment, and highlight the indoor visual expression ability. Compared with back maintenance screen, the advantages of frontmaintenance LED screen are mainly to save space, maximize the utilization of environmental space and reduce the difficulty of postmaintenance. The front maintenance mode does not need to reserve maintenance channels, supports front access, and saves maintenance space on the back of the screen. It does not need to disassemble wires, so that it canmaintain quickly and be simpler and more convenient to disassemble. When the front maintenance screen is damaged at a single point, it only needs to disassemble and maintain a module, which has higher maintenance efficiency and lower cost. However, the density of indoor LED display screen is higher, so the requirement for heat dissipation of the cabinet is higher, otherwise, local faults are easy to occur. Relatively speaking, There are some advantages of back maintenance screen. Its price is slightly lower, it is suitable for roof-type, column-type and other installation scenes, and its inspection and maintenance efficiency is higher. Due to different application scenarios, we can choose these two maintenance methods according to actual needs.
