​​Hey, where should you put the receiving card of this LED large screen? ​ ​
Most of the newcomers who have just entered the industry are stumped by this problem. Last time a customer forced the receiving card into the power bank, but the equipment smoked. I still remember the scene. Today we broke it apart and said, "You will never be confused again after listening!"

​​Which is the most reliable place to receive a card? ​ ​
Let’s talk about the conclusion first:​ ​More than 90% of professional-grade LED screens hide this treasure in three places:​​

1. ​​Splicing box bottom right​ ​:No more than 30cm away from the display module, and it is protected by a magnetic cover plate.
2. ​​Inside the heat dissipation grille​ ​: Design with spring buckle, you can pop out with just a press of your hand
3. ​​Quick maintenance warehouse​ ​: The small door with the ⚡ logo printed on the outer box, it will be opened as soon as it is twisted

​​Give a real case​ ​: Last year, a shopping mall installed an 8K curved screen. The master installed the receiving card on the top of the box, but the screen was lost due to poor heat dissipation. Later, it was changed to the right heat dissipation zone, and the failure rate dropped by 80%!

​​The five-step installation tips have been recorded:​​

1. ​​Interface​ ​: Align the red edge of the cable at the first pin of the HUB interface of the receiving card, just like the charging port of the mobile phone must be plugged in
2. ​​Try to power on​ ​: Connect the 12V debugging power supply first, don’t directly hit the 220V power supply
3. ​​Measure the signal​ ​: Use the output terminal of the multimeter meter 5V, the voltage fluctuation cannot exceed ±0.2V
4. ​​Make insulated​ ​: Paste 3mm thick mica pieces to prevent short circuit and fire
5. ​​Lock position​ ​: Fixed with M4 screws with rubber pads, which are both shock-proof and heat-dissipating

​​The pit that novices often step on​ ​: 23% of people connect the cable opposite, remember​ ​"Red edges are against OE, data will not fly"​ ​This is correct

​​Installation paths for different scenarios​​

​​Industry cold knowledge​ ​: Receiver card with intelligent temperature control, can withstand it in an environment of -20℃ to 50℃, and is more than 3 times more durable than ordinary models.

​​The golden rule of maintenance​​
Don't panic when you encounter a black screen. Follow this process to check:

1. Touch the shell temperature: After 45℃, power off immediately
2. Look at the indicator light: Normally, the green light is always on, and the red light flashes, the signal is off.
3. Listen to the relay: There is a "click" sound when starting, indicating that the power supply is normal
4. Test interface voltage: 5V output terminal is less than 4.8V and immediately change the power supply

​​Personal bloody and tears lessons​ ​: Last time I used a miscellaneous brand cable with a cheap price, but the signal was sometimes missing. Later, I changed the industrial-grade cable and I didn’t have any problems in three years. I really can’t save this money!

Nowadays, LED screens are getting smarter and smarter, and some high-end models have already used wireless receiving cards. But then again, no matter how advanced the technology is, it cannot be separated from solid basic installation skills. Next time I see the large screen in the mall, I might as well think of the receiving cards hidden in the metal shell. It is these inconspicuous small components that support the "brain neural network" that supports the entire screen. If you want to talk about the tricks in this industry, it really fits the old saying - outsiders watch the fun, while insiders watch the tricks!

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