Core question 1: What exactly does the control card play?

Do you know? The control card is like the "brain" of an LED screen, which directly determines whether the picture can play smoothly. This black box has to do three major things:

• ​​Translate the video signal into instructions that can be understood on the screen​​(For example, disassembly 4K video into millions of pixels of light and extinguish data)
• ​​Command the driver chip to work​​(Tell each lamp bead when and how strong it will be)
• ​​Real-time monitoring of screen health status​​(Temperature, voltage, and signal delay must be watched)

​​Important Tips​​: If the control card is not installed in the right place, the screen will be stuttered at the least, and the module will be burned at the worst. Last year, a shopping mall caught fire with a large screen. After checking, it was caused by poor heat dissipation of the control cabinet!

Core question 2: Comparison of advantages and disadvantages of common installation locations

There are many requirements for the installation methods of control cards in different scenarios. Let’s use the form to speak human words:

For example: a stage floor tiles that will deform with music must be used​​Distributed control card​​——Only by hiding a small control card in each floor tiles can you keep up with DJ’s hand speed!

Core Issue 3: Guide to avoid pits when installing special scenarios

​​Three fatal situations, regret it if you pretend to be wrong​​：

1. ​​Seaside screen installation​​: The control cabinet must be more than 10 meters away from the screen, and a titanium alloy salt spray shell must be installed
2. ​​Basement installation​​: In the environment with a humidity of more than 75%, the control card must be equipped with a dehumidification module (can draw 500ml of condensate every month)
3. ​​High-altitude hoisting screen​​: The control card is installed separately from the screen, and the signal is transmitted through optical fiber (wireless transmission delay will be fatal)

The most outrageous case I have ever seen: A scenic spot puts the control card on the back of the screen, and the sun shines directly in summer, and the chip temperature soars to 90℃, which is more exciting than frying steak!

Core question 4: How to judge the need for an independent control cabinet?

Remember this​​20-50-80 Principle​​：

• Screen area > 20㎡ → Independent control cabinet must be
• The refresh rate of the playback content ≥3840Hz → The control card needs to be equipped with a cooling fan
• Ambient temperature fluctuations >50℃ → A constant temperature control cabinet is required (the chip will shrink solder if the temperature difference is too large)
• Transmission distance > 80 meters → Use optical fiber transceiver instead (the signal attenuation of ordinary network cables exceeds 30%)

​​Industry cold knowledge​​: The control card of high-end stage screens must even be equipped with air conditioners! A transparent screen used in a concert last year was stuffed with a micro compressor in the control cabinet, and the temperature was controlled at 25±2℃ all year round.

Core question 5: What should you pay attention to in daily maintenance?

Don't think that everything will be fine after pretending! These three maintenance details double the screen life:

1. ​​Monthly cleaning​​: Use compressed air to blow the card heat sink (the cotton swab will retain fiber)
2. ​​Quarterly physical examination​​: Use a multimeter to measure the fluctuation of the supply voltage (repair immediately after the error exceeds ±5%)
3. ​​Annual upgrade​​: Update the control card firmware program (new algorithm can improve response speed by 15%)

A lesson from a restaurant owner: I haven’t cleaned the dust for two years, and the control card has accumulated 3 mm thick dust. As a result, when playing the steak video, the screen was really smoked - those who don’t know would think they were having a 4D experience!

Understanding the control card installation doorway can at least avoid 80% of after-sales problems. Now I know why some screens are not broken for ten years, while others are scrapped in three months, right? remember,​ ​Good screen = good hardware + good installation + good maintenance​​, these three tricks are missing and you can’t play with anything!

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