Friends who are new to LED displays are often dizzy when they are wound around various lines? Especially the legendary receiving card, it is clearly said to be very important, but I just can't find where it is hidden. Let’s take a look at the location secret of this mysterious component today, and by the way, let’s talk about how newbies can quickly get started with LED display maintenance - that’s right, just like you want to learn "how newbies can quickly increase their fans", mastering the core skills can achieve twice the result with half the effort!

​​Find out what the receiving card is for first​​
This thing is equivalent to the "nervous system" of the display screen, and is responsible for translating the video signal into a language that LED light beads can understand. If you have seen a local black block suddenly appear on the large stage screen, it is probably because you are getting stuck in the receiving end. The high-end LED screens on the market now, such as those used in stadiums or commercial advertisements, have long evolved to be able to automatically adjust the brightness. The brightness of the outdoor screen can even reach 7500cd/m² and can operate stably.

​​Three classic locations for receiving cards to hide​​

1. ​​Rear groove of the box​ ​: Most standard LED boxes will have a slot with a heat dissipation hole on the metal shell, which can both prevent dust and quickly dissipate heat. I have a cold knowledge - some waterproof models of card slots will be made into a maze structure and can work normally on rainy days
2. ​​Send card linkage area​ ​: When encountering a large display screen that requires multiple receiving cards to work together, it is usually concentrated in a dedicated cabinet near the control room. This centralized management method is particularly convenient for maintenance.
3. ​​Special integrated design​ ​: Now some cutting-edge technologies directly integrate the receiving card chip on the back of the module. This integrated design is particularly suitable for rental screens that require frequent disassembly and assembly. I heard that the latest aluminum magnesium zinc alloy boxes use this trick.

​​Frequently Asked Questions​​
Q: What happens if the screen is broken if the receiving card is broken?
A: At the least, the partial screen will be in the screen, and at the worst, the entire screen will be black. However, high-end products now have dual backup designs, just like the latest stage screen of a certain international brand. The main and backup receiving cards can be automatically switched, leaving no chance for performance accidents at all

Q: How to judge the quality of the receiving card?
Look at three hard indicators:

• ​​Refresh rate​ ​: Starting at least 1920Hz, otherwise it will be full of water ripples when taken
• ​​Temperature protection​ ​: It is really reliable to work normally from -20℃ to 60℃
• ​​Protection level​ ​: Outdoor use must reach IP65, and it must be considered qualified by dust and waterproofing.

​​Selecting a receiving card depends on the application scenario​​
Those who engage in commercial advertisements must choose a model with automatic brightness adjustment, after all, the light changes greatly from morning to night. ； Those who do stage rental must find one that supports quick disassembly and assembly, and it is best to replace the complete system in half an hour. ； The ones used for stadiums are more durable and can withstand the vibrations caused by the audience's stomping feet. To be honest, I have seen too many people buy miscellaneous cards with cheap pictures, but they went on strike in a group on rainy days. The maintenance fee is several times more than the money I saved at the beginning.

​​Maintenance tips​​

1. Clean the heat dissipation holes with compressed air every month, and do not wipe them with a damp cloth.
2. Check the network cable interface regularly, and change it if it is oxidized and blackened.
3. When upgrading the system, remember to back up the parameters first, don't ask me how I know...

Editor's opinion: Now I know why the receiving card is hidden, right? This thing is like the internal skills and mental methods in martial arts novels. It is usually invisible and intangible, but if something really happens, it will be a big deal. Next time you encounter a display failure, remember to find this "invisible commander" first, and the problem may be solved in minutes!

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