What is a sending card?

Alas, Xiaobai, who has just come into contact with the large LED screen, must be confused: "Why is the circuit board in this iron box so important?" To put it bluntly,​Send a card is like a "nerve center" of a large screen​, responsible for translating the video signals in the computer into languages ​​that LED light beads can understand. Let’s give a down-to-earth example - your WiFi router turns network signals into wireless waves that your mobile phone can receive, and the sending card does a similar job, but it specializes in display signal conversion.

The key point is here! Professional-grade large-screen sending cards are not easy to plug anywhere. Take the curved advertising screen we made for Singapore as an example. If the sending card is installed in the wrong position, the entire 2,000㎡ screen can perform a "collective strike" for you, and the maintenance cost is not a joke.

Three golden rules for installation location

"Then where should this treasure be put?" Remember these three​Life-saving principle​：

1. ​​ Stay away from the heat source area​​: Never install it against the power module, as the high temperature will directly cause the sending card to "heat stroke" to crash. Professional boxes will leave a cooling channel, just like installing a fan on your computer host.
2. ​​Close to the signal input​​: Generally installed near the DVI/HDMI interface on the back of the box, shortening the signal transmission distance can reduce interference
3. ​​Fixed and anti-vibration​: Especially for outdoor screens, they must be fixed with screws with shock absorbing pads. Last year, the Tokyo Stadium project suffered a loss. The cheerleader jumped so hard that the sending jam was relieved, and the live broadcast of the game almost failed.

Here is a cold knowledge: the sending card for high-end rental screens will be madeQuick disassembly design​, it's like changing a SIM card on your phone. Why is it designed like this? It is convenient for quick inspection during tours! The floor tiled screen we made for a music festival can be replaced in 30 seconds, which is more flexible than a guitarist changing strings.

Step-by-step installation guide (must-read for novice)

Don't be scared by those professional terms, follow the steps:
① ​​Downpower! Power off! Power off!​​ Say important things three times. After measuring the voltage with the multimeter, I started to do it. Last year, some colleagues operated without power off. 5,000 lamp beads instantly "fireworks"
② Find the box back platePCI expansion slot​, and slowly push the card with the golden finger. Remember to be as gentle as inserting a game cassette. If you can't do a miracle with great force, you will only cause failures.
③ When locking the fixing screws​Step diagonal​, don’t just turn it to the end like you’re screwing the bottle cap. This trick is the experience we masters have obtained by breaking three circuit boards
④ Finally connect the 5V power cord and signal cable, and pay attention to the interface color mark. Got it wrong? At the least, you can burn the screen, and at the worst, you can burn the card directly. Don't ask me how I know...

For example, when a shopping mall installs a high-definition LED wall, a novice connects the signal cable to the power supply port, and the sending card smokes on the spot. Later, I changed to a new model with an anti-fire interface, and this low-level error never happened again.

Guide to avoid pits (Blood and Tears Lesson Edition)

These​Doing to do itDon't try:

• Use ordinary screws to fix the sending card → Vibration causes poor contact
• Ignore grounding processing → electrostatic accumulation burns the chip
• Install multiple sending cards on stacked → Poor heat dissipation collective downtime

There was a classic case last year: a stadium fence screen installed six sending cards, but in the end, all of them were stuck in the hot summer days. Later changed toDistributed installation + intelligent temperature control​, now the dog days of summer still operate steadily. So,​The installation location directly determines the service life​​！

Talk about the experience of veteran drivers

I think"It is just a beginner to know the principle of installing a sending card"​​. Nowadays, high-end screens are all used to intelligent temperature control. For example, the transparent window screen we made for Seoul, the sending card can automatically adjust the power according to the ambient temperature, which is much smarter than old-fashioned devices.

Be careful when choosing equipment: see if the box has three-preventive treatment, whether the interface is gold-plated, and whether the thickness of the heat sink is enough. The manufacturer has done these details and will not cause any problems after using the equipment for five or six years. Remember,​Good horse with good saddle​​, don’t let small mistakes in the installation position destroy the entire screen!

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