Alas, friends who have just entered the industry, have you ever had this experience - worrying about the shiny LED screen, and my heart was filled with swaying: "Where is this control card hidden? "Don’t worry, today we will break it and talk about this. We will ensure that you can become a sensible person after reading it!

1. The secret of the control card hiding

Speaking of the control card location,​​Remember three key orientations​​That's right:

1. ​​Priority principle on the right​​: When standing facing the display, it is almost the border on the right hand side
2. ​​Behind the unit board​​: It often hides on the back of the first display unit board, just like a mobile phone SIM card hidden under the back cover
3. ​​Special structural areas​​: The curved screen may be at the corner, and the floor tiled screen may be hidden at the joints

For example, the curved advertising screen installed by our company in Singapore is cleverly hidden in the maintenance warehouse at the curve turning point. This design is convenient for maintenance and does not destroy the overall aesthetics.

2. Full diagram of installation steps

Step 1: Equipment Inspection

• Prepare Phillips screwdrivers and multimeters
• Confirm the control card model in accordance with the instruction manual (full color card for full color screen, monochrome card for monochrome screen)
• Focus on checking whether there are creases in the cable and whether the interface pins are neat

Step 2: Accurate positioning

1. Find the access cover on the right side of the display
2. Removing the cover will allow you to see the control card slot (like where the computer plugs in the memory stick)
3. Pay attention to the color marking of the interface: red + 5V is connected to the positive electrode, black GND is connected to the negative electrode

Step 3: Line connection

The most prone to errors here! Remember two sentences:

• ​​"The principle of red edge facing upward​​: The red marking side of the cable corresponds to the first pin of the control card interface
• ​​"Rules for seating​​: HUB12 interface is connected to port 12, HUB08 interface is connected to port 08, do not plug in the wrong

Three and Five Guide to Avoiding Pits

1. ​​The voltage must be stable​​: Use a multimeter to measure the 5V voltage and then turn on. This is the reason why our company's products are equipped with a voltage stabilization module.
2. ​​Three anti-static moves​​：
   • Touch the metal door handle before operation to discharge
   • Wear an anti-static bracelet (if you don’t have one, you can use the key to link it)
   • Control card does not directly contact the metal frame
3. ​​Interface taboos​​：
   • Plug and unplug the cable with electric power is a taboo!
   • The network port control card does not need to be connected to the antenna, and the WiFi card must be removed from the anti-static bag.
4. ​​Debugging order​​：
   First, take a separate unit board to test
   After normal display, connect the entire screen
   This is especially important for creative floor tiles.
5. ​​The environment is important​​：
   Humidity remains 40%-60%
   Temperature should not exceed 35℃
   Our company's stadium fence screen relies on this standard to withstand the sun and rain.

4. Choose a lot of ways to choose a card

You can’t just pick a control card, just grab it. You have to check these:

• ​​Point Match​​: For example, P4 full-color screen, single cassette loading should exceed 250,000 points
• ​​Functional counterpart​​：
  • Advertising screen must support timing switch
  • The stage screen must have a high refresh rate (our product comes standard with 1920Hz)
• ​​Interface type​​：
  • Use a network port from a long distance (like a highway billboard)
  • WiFi for mobile devices (commonly used in shopping mall poster screens)
• ​​Expand space​​: Reserve 20% margin for future upgrades

Personal opinion time

I want to say that the development trend of this industry is very obvious:​​Control cards are becoming smarter and easier to install​​. Take our newly released transparent screen as an example. The control card is directly integrated into the border and can be used by plugging in the power supply. However, no matter how things change, you will be in line with the basic installation principles, and you will not be afraid of any new equipment.

By the way, I recently discovered an interesting phenomenon: many novices are always confused about the position of the control card. In fact, the key is to understand its working principle. This thing is like the brain of the display screen. Of course, you should choose a safe and convenient place to "issue orders". Next time you encounter installation problems, you might as well draw a signal transmission roadmap first to ensure twice the result with half the effort!

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