You stared at the newly assembled LED screen, and the screen suddenly began to flash like a wind. The maintenance master asked, "Where is the sending card?" Only then did you remember that the installer stuffed the small black box into the bottom layer of the control cabinet. Last year, a shopping mall in Guangzhou made this mistake and the million-dollar advertising screen performed a "light show" on the opening day. The maintenance team removed half of the wall to find the overheated sending card.

Three major misunderstandings in installation location

Let me tell you the truth: A hotel in Hangzhou hid the sending card in the mezzanine behind the LED wall, and the screen "strike" on time every weekend. Later I found out that the kitchen fume was covered with circuit boards along the vents. Here is a reminder for newbies:

1. ​Don't be a Russian doll​: The minimum interval between the sending and receiving cards is 50cm. The most outrageous case I have ever seen is that the two devices are fitted back to back
2. ​​Waterproof does not equal moisture resistance​: Remember to install equipment in the basement and use a dehumidification box. The humidity exceeds 60% will make the signal look like an old lady crossing the road - trembling
3. ​​The cooling space should be reserved​: Leave 10cm of space on the upper, lower, left and right of the equipment box, just like leaving a scattered place for the pot when you eat hot pot

Last month, when I visited the factory, the technician demonstrated a trick - installing the sending card on a slide rail bracket with a fan. Pull it out directly when debugging is needed, which is much more elegant than drilling to the back of the screen and sticking out your butt to find the device.

The golden rule for correct location selection

A friend who was doing wedding celebrations designed a "sandwich" installation method for the mobile stage screen:

• ​​The outermost layer​: Dustproof net + heat dissipation hole
• ​Intermediate layer​: Send card and power adapter back-to-back installation
• ​​The innermost layer​: Apply thermally conductive silicone pad to fix it on the aluminum alloy back plate

In actual measurement, this method can directly reduce the temperature of the equipment by 8℃ and extend the life span by at least two years. Remember these three points when selecting a specific location:

1. ​Signal transmission distance​: Do not have to exceed 100 meters of network cable, if it exceeds it, you have to use an optical fiber converter (don’t be too stubborn for eating a buffet)
2. ​​Electromagnetic interference protection​: Stay away from variable frequency air conditioners and high-power motors, like a supermarket screen, but finally found that it was the cold storage compressor.
3. ​​Convenience convenience​: The equipment box door must be able to open and close above 90 degrees. I have seen the design of folding doors.

Lessons of blood and tears during debugging

Let me tell you about the inside story of the industry: improper sending card settings will make the screen look like Parkinson's. Last year, VJ couldn't adjust the screen synchronized at a concert, and finally found that it was a sending card.​Refresh rate​No screen parameters matched. Three must-see parameters for debugging:

• ​Resolution settings​: Never select "automatic recognition" and honestly enter the actual pixels of the screen
• ​Color depth​: 10 bits of indoor screen are enough, and 12 bits of outdoor highlighting screens are enough
• ​​Grayscale correction​: For example, if you play SLR cameras to adjust ISO, you have to find a way to make up for it or underexposed.

A ruthless man invented the "temperature calibration method" - adjusting the output power based on the surface temperature of the transmission card when it is working. Use the standard mode below 40℃, and start intelligent frequency reduction if it exceeds 45℃. This method has saved many old equipment.

Common Troubleshooting Guide

The most bizarre fault I have encountered is that the sending card works normally, but the screen displays the calendar - played loop on January 1, 2020. Guess what happened? The device clock chip is short-circuited due to moisture. FAQ handling list:

1. ​​The picture tear​: Check the crystal head of the network cable first, 80% of the 3rd and 6th cores have poor contact
2. ​​Partial black screen​​: Re-sweeping firmware is faster than changing cards, remember to back up the configuration files in advance
3. ​Signal delay​: Try changing the "Speed ​​Speed ​​Mode" to "Compatible Mode" and the same principle as the elderly's mobile phone to adjust the word mode

There was a case that was very impressive: the circular screen in a gym always showed the screen first in the lower right corner. It took the technician three days to find out that the sending card was installed in the opposite direction. Nowadays, the masters are used to sticking direction arrow labels when installing equipment.

Personal opinion time

To be honest, the sending card is a delicate little wife - she can't be cold or hot. The most reliable installation solution I have ever seen is to install a temperature and humidity sensor in the equipment box, even the mobile APP. One day when you receive an alarm prompt, you will know that it is time to bring a small brush and dehumidifier to pet the equipment.

The last nagging sentence: Novice should not save the installation fee of a few melons. Last year, I met an old man who installed a sending card by himself, but he used the waterproof glue strip as double-sided glue. A heavy rain directly made the equipment perform "water flooding the Jinshan". If you want to find it, you can provide it​Full process technical support​The one-stop service from installation positioning to parameter debugging is a hundred times better than thinking about it yourself. After all, if this thing is installed correctly, it is productivity, and if it is installed wrong, it is a time bomb. Do you think so?

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