Have you encountered this situation? The mall needs to install a 200-square-meter outdoor large screen. When inquiring about the price, it was found that the products of the same specifications were different, and the quotations of different manufacturers were more than 200,000 yuan. What’s even more outrageous is that some suppliers can’t even explain the basic parameters clearly, and they say “Don’t worry, there’s no problem.” I don’t know how a novice can quickly get started with LED procurement, but choosing the wrong supplier will definitely make you cry in the toilet - a customer just complained to me last month that the LED screen he bought had a color difference after half a year of use, and the maintenance fee was 50,000 more than the money he saved at the beginning.

​​Look at the cost of this severely affected area​. Many purchases only focus on the unit price per square meter, but in fact there are three major invisible expenses hidden here:

1. Structural steel frame cost (accounting for 15%-25% of the overall budget)
2. System debugging costs (especially 8% more for curved screens)
3. Three-year maintenance insurance premium (average annual depreciation rate starting from 12%)
   There is a real case: a certain enterprise saved 30,000 yuan in procurement fees, but found that the load bearing was not enough during installation, and it cost 80,000 yuan to reinforce the steel structure.

​​Supplier screening is the most deadly​. Last week I went to inspect the factory and saw a workshop renovating it with its own eyes. The inspection reports were all PS. I'll teach you some ruthless tricks:
√ Let the manufacturer connect to the video to watch the automated production line
√ Required to present the raw material purchase form (focus on the batch of lamp beads)
√ Test the consistency of the brightness of the four corners of the screen (direct pass with an error of more than 10%)
Remember, the quality of suppliers who dare to let you rush to inspect the factory at any time is basically not much worse.

​​The word game in the contract can kill people​. The most bizarre dispute I have dealt with recently: the "three-year warranty" signed by the customer does not include the power module. There are five key terms that must be stared at:
① The warranty scope is specified for each component
② The brightness attenuation rate states that it is ≤5% per year
③ The maintenance response time is accurate to the hour
④ Overdue delivery of liquidated damages start from 1% per day
⑤ Belonging to the liability for intellectual property disputes

Speaking of installation acceptance, here is a lesson learned from blood and tears. The outdoor screen bought in a scenic spot looked pretty beautiful during acceptance, but it ended up being short-circuited when it rained heavily. Now I will teach you the necessary items to check for acceptance:

• Waterproof test (continuous water drain for 2 hours)
• Heat dissipation test (4 hours of full load in high temperature environment)
• Splicing seam inspection (use the bank card to insert the gap, if it can be inserted more than 1mm, it will not be correct)

I suddenly remembered a key data: the 2023 industry report shows that 38% of LED screen failures are caused by power modules. So I would like to remind you not to save money on the power system and identify these two configurations:

1. Dual loop power supply design
2. Independent overload protection device
   Spending this 20,000 extra budget can avoid 80% of the risk of power outages in the later period.

Recently, a new trend has been discovered - more and more customers are starting to request cloud control functions. Although this will increase the budget by 5%-8%, it is indeed worth it: remotely modifying content can save 6-8 manual maintenance fees per year, and the screen can be switched in 30 seconds when encountering an emergency. However, we should pay special attention to system security. Last year, a mall was hijacked by hackers to play bad content, and the direct loss was over one million.

Finally, let me tell you a secret that only my colleagues know: many manufacturers that claim to be "export quality" actually export volume is less than 10%. What is truly reliable depends on these three hard indicators:

• Overseas project acceptance form (at least 3 different climate zone cases)
• Original international certification document (no copy)
• Real-time demonstration of multilingual control system
  Remember to check these things out next time the factory is inspected to ensure that 80% of the deception suppliers can be screened out.

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