Alas, have you ever encountered such embarrassment? The shopping mall screen shows "11:00 am", it is already 3 pm on your phone! Last week, I debugged the large screen of the conference room for customers, but because the time was not synchronized, all the video conference staff were half an hour late. Today we will understand this——​ ​Where to adjust the time of the LED screen​​？

1. The core position of time setting

​​Let's talk about the inside story of the industry first​​: 99% of the LED screen time is not in the screen itself! It is like a human biological clock, and the control center is in three places:

1. ​​Control card background​​: The iron box the size of a matchbox is hidden on the back or side of the display screen
2. ​​Send card software​​: The time calibration module is hidden in the debugging software connected to the computer
3. ​​Intelligent system cloud​​: When high-end screens can be automatically connected to the Internet, the error does not exceed 0.5 seconds

To give a real case: The countdown to the fenced screen competition in a gymnasium last year was 3 minutes long, and the referee was so anxious that he jumped. Later I found out that the built-in battery of the control card was out of power, so I changed the button battery and solved it immediately. So,​ ​Find the control terminal first​​！

2. Secrets for setting different scenarios

1. ​​Fixed installation screen​​(such as shopping mall advertising screen)

• Steps: Remove the back cover of the box → Find the control card → Press the SET key to enter the menu → Select GPS automatic timing
• ​​Key parameters​​：
  • The time zone must be selected as "GMT+8" (Chinese standard)
  • Daylight saving time switch to turn off
  • The synchronization interval is set to 24 hours

2. ​​Rental mobile screen​​(Commonly used in stage performances)

• Tips: Check it in the card sending software​​Intelligent brightness synchronization​​, the display mode will be automatically adjusted according to the ambient light
• Pit avoidance guide:
  • Always turn off automatic updates before shipping
  • Cross-time zone performances should be imported into the local time zone table in advance
  • Prepare a Beidou timer (reliable than network time-based)

3. ​​Customized system screen​​(such as the event timing screen)

There's a ruthless job here——​​Millisecond synchronization technology​​! Through optical fiber transmission + atomic clock calibration, the error can be controlled within ±3ms. Do you still remember the 100-meter running screen in a stadium in Tokyo? This technology is used to achieve real-time synchronous live broadcast of end time.

3. Guide to self-rescue of six common faults

Last week I encountered a strange situation: the large screen shows "2023", and I will never go back to 2024. Guess what? The control program is locked in factory test mode! Don’t panic when encountering time problems, follow this process to check:

1. ​​Look at the control card indicator light​​: Normally, it is a slow flash in green, and a flash in red indicates a system error
2. ​​Check the built-in battery voltage​​: Replace immediately below 2.8V (model CR2032)
3. ​​Test network time delay​​: Ping the ntp server, use local calibration if it exceeds 200ms
4. ​​Reset time protocol​​: Changing NTP to SNTP protocol can solve 80% of networking problems
5. ​​Check firmware version​​: Devices before 2018 may not support the new time format
6. ​​Look at the temperature effect​​: In extreme environments (-20℃/60℃) to be turned on​​Low temperature compensation mode​​

Say something heart-to-heart:​​Regular maintenance is ten times more important than repairing it if it is broken​​! It is recommended that when doing comprehensive schooling every quarter, especially outdoor screens, be moisture-proof and static.

4. Intelligent settings that experts know

Now the high-end screen has come up with new tricks——​​Situation mode linkage​​! for example:

• Automatically switch meeting mode at 8 a.m. (time display + agenda schedule)
• Start advertising mode at 6 pm (accurate carousel timing to seconds)
• Enter power saving mode at 12:00 midnight (time display brightness is reduced by half)

This feature looks cool, but has a fatal detail:​​Automatic system update must be turned off​​! Last year, a brand store automatically upgraded the system in the middle of the night, causing the opening time to be "00:00", which suffered heavy losses!

Personal opinion

After working for more than ten years of technical support, I found a rule:​​The more basic the function is, the more the manufacturer's strength is tested.​​! The time setting of this "peaceatic" function actually involves firmware development, hardware compatibility, and system architecture. Next time you choose the display screen, you might as well make the time wrong and see how long it will be automatically corrected - this is the test​ ​Really intelligent​​The touchstone! Those manufacturers who dare to promise that the "year time error does not exceed 1 second" must use military-grade clock chips, and such partners are worthy of entrusting.

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