Newbies who are new to large LED screens often ask: "Where should I put the sending card that looks like an iron box?" "When debugging the fence screen of a stadium in Tokyo last year, engineers installed the sending card under the air outlet of the air conditioner. As a result, the condensation water directly caused the equipment to short-circuit. You see, it is really fatal to choose the installation location poorly.

​​The standard installation position of the sending card is actually very particular.​​
The 19-inch standard slot of the control room rack is the first choice, but three points should be noted: 1. The distance from the video processor should not exceed 3 meters. 2. Avoid strong electromagnetic interference sources (such as large transformers). 3. Ensure that the heat dissipation space is ≥10cm. The most outrageous case I have ever seen is that the sending card was stuffed into an airtight iron cabinet and the overheating protection occurred two hours after it was turned on.

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​​How to dress appropriately in outdoor scenes​​
The aluminum-magnesium-zinc alloy boxes commonly used for outdoor advertising screens come with their own installation slots. Remember this formula: the top does not cover the awning, and the bottom does not touch the ground. The best position is at 1/3 of the height of the back of the screen, which can avoid rainwater intrusion and facilitate the plugging and unplugging of network cables. The stadium fence screen with IP65 protection should not be installed too concealed, and at least an A4 paper-sized operating space should be left at the inspection opening.

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​​There is a doorway for quick disassembly of the rental screen​​
The buckle design of the quick-disassembly box is not a decoration, and the sending card must be fixed on the movable bracket. Industry veterans all know to follow the "three-second rule"—no more than three seconds from unboxing to card insertion. Important reminder: For sending cards with intelligent brightness adjustment function (such as models that support 800-1200 nits automatic adjustment), be sure not to block the light sensor probe when installing.

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A customer asked: "Why is there a problem when installing two sending cards in the same location? "This involves the metaphysics of signal synchronization. It is recommended to install at least 50cm apart, especially for models that support 1920Hz high brush. Last year, the Singapore curved screen project suffered a setback - two cards were installed back to back, and magnetic field interference caused image tearing. Although new driver ICs now achieve low power consumption of 0.8W/㎡, they still need to be cautious in dense installation.

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The most difficult case encountered was the cylindrical screen in the Dubai Mall. The sending card was installed in the steel frame structure, causing signal attenuation. Later, the problem was solved by using an aviation plug with shielding function. Remember this truth: the more complex the installation environment, the more priority must be given to cable quality. Nowadays, mainstream solutions use silver-plated coaxial cables, and the transmission distance is more than three times longer than ordinary network cables.

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The editor finally tells the truth: if you choose the wrong installation location, no matter how good the equipment is, it will be in vain. Those teams that say 24-hour technical support are really not just for free. It is common for customers to remotely guide customers to change their installation plans at three in the morning. Before installing the sending card next time, take a picture of the equipment manual and site floor plan for the technical guy to see, and you can be sure to avoid 80% of the detours.

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