Lao Wang, who just opened a store, has been worried recently - the newly equipped LED large screen is sometimes missing. The repairman lifted the back cover of the screen and found that the main unit was actually hung directly on the steel structure frame, and the main board was burned out during the rainy season. This matter sounds outrageous, but last year a gym chain was even more exaggerated. They stuffed the control host into the meter box in the fire escape, and the power was directly cut off during the property inspection...

​​The three taboos of host hiding place​
The easiest pit for beginners to take advantage of is to put the host as an ordinary appliance. Don't choose these three positions:

• ​​High temperature zone​: Like the equipment room on the top floor of the mall, the temperature can soar to 60℃ in summer
• ​​Wet areas​: Basement or bathroom partition, humidity exceeds 80% of the motherboard is rusty
• ​​Strong electromagnetic zone​: Within 3 meters from the elevator motor, signal interference makes you doubt your life

There is a very interesting comparison data:

Last year, a cinema stuffed the console behind the popcorn machine, but the butter steam made the circuit board into pancakes - the repair bill hurts!

​​Five golden positions are found like this​
The installation points often selected by professional engineering teams are correct, novices should follow them:

1. ​Steel structure mezzanine​: No more than 5 meters away from the screen, the signal attenuation is reduced by 70%
2. ​​Insuring the side wall of the passage​: Reserve 80cm of operating space to facilitate plugging and unplugging of network cables
3. ​​Independent waterproof cabinet​: IP55 box with heat dissipation holes can be as stable as an old dog in the rainy season
4. ​​ Equipment derrick top floor​: 1.8 meters above the ground to prevent trampling. Remember to install a vibration alarm
5. ​​Inside the ceiling maintenance port​​: Hidden deeply without affecting heat dissipation, this trick is the most popular in the mall

I will teach you a unique skill - use a mobile phone compass to measure the magnetic field. If the magnetic field strength within 2 meters around the host exceeds 50μT, please change the place immediately. A certain gymnasium suffered a secret loss, and the host was placed under the audio amplifier. During the competition, the subwoofer shocked the system and crashed twice in three days.

​​Hidden way of line layout​​
Don't think that choosing a good position is done. These three details are fatal:
① The power cord/network cable must be separated into slots, and the crossing interval is > 20cm to prevent interference
② The grounded copper tray must be connected to the main body of the building, don’t connect the water pipe by yourself.
③ Leave 30% of the spare line, and do not need to smash the wall after the later upgrade

Now all high-end solutions are available​Double loop backup​: When the host computer pulls two independent network cables to the screen, it will still be broadcast if one is broken. I heard that there is a curved screen project in Singapore, and even the power supply has been made with dual circuits, and there has not been a black screen accident in three years.

Finally, there is an inside story in the industry - some engineering teams pile up the host and control cards together in order to save trouble. This is simply a tragic death! Professional plans should be separated by at least 1.5 meters, and it is best to use metal partitions to shield them. During the next acceptance, remember to touch the cabinet shell with the back of your hand. If it is warm and warm, it means that the heat dissipation is qualified. If it is hot, please rework immediately!

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