​​Core question: Which side of the LED large screen should the control card be inserted?​​

​Answer: The standard installation location of the control card is usually located on the left side of the screen​​. According to the industry's general design specifications, more than 80% of large LED screens reserve data input ports in the left frame. This layout can not only simplify the cable routing path, but also avoid cross-interference between signal lines and power lines. However, for screens with special structures (such as curved screens or special-shaped screens), it is recommended to refer to the "Installation Technical Manual" included with the product to confirm the card direction.

​​Three-dimensional judgment rules for control card positioning​​

​1. Physical space matching principle​

• ​Box back logo​: Look for the card slot area with the word "signal input" on the back of the screen. This position usually reserves the installation hole position and heat dissipation structure.
• ​​Cable routing logic​: The control card must keep a straight line distance from the first unit board ≤50cm,​Short signal transmission paths can reduce the risk of screen delay​​
• ​​Heat dissipation performance verification​: After installation, it is necessary to ensure that the control card heat sink is aligned with the box ventilation holes, and the operating temperature should be stable in the range of 25-45℃.

​2. Electrical Characteristic Verification Process​

1. Use a multimeter to detect the positive and negative poles of the power terminal to ensure that the red/black lines correspond to the "+5V/GND" mark.
2. Test the conductivity of the cable: The red reference line in the 16-pin cable must be facing the OE marking end of the unit board
3. After power on, the control card status light is observed: green always light means normal signal, red flashes to check the network interface protocol matching degree

​​Operation Guide for Typical Installation Scenarios​​

​​Operation taboo list​：

• ✘ It is prohibited to plug and unplug the control card without power off.
• ✘ Avoid contact with the wired gold fingers with bare hands (requires anti-static wristbands)
• ✘ The bending radius of the signal line must not be less than 5cm to prevent the internal copper foil from breaking.

​​Advanced skills: Dual control card redundant configuration solution​​

For large LED screens with an area of ​​more than 50㎡,​It is recommended to use the master-slave control card parallel architecture​​：

1. The main control card is installed in the conventional left position, responsible for 80% of the display area driver
2. The slave card is placed on the right side of the screen and synchronizes the data packets through the HUB expansion chip
3. Configure automatic switching module to seamlessly enable the backup system when the main control card temperature exceeds 55℃

This solution shortens the screen fault repair time from 45 minutes to 8 seconds, and is especially suitable for zero-tolerant scenarios such as sports events and concerts.

By accurately positioning the card plug-in position, the system stability can be improved by more than 20%. Choose a control module with intelligent temperature control and waterproof and dustproof design, and cooperate with standard installation procedures to ensure that the large LED screen can always maintain excellent display performance in complex environments. For special project needs, it is recommended to directly obtain customized wiring solutions from the engineer team.

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