Kecaixin LED Display Screen and Conference System Video Player Maintenance Guide

Kecaixin LED Display Screen and Conference一体 Machine Common Usage Maintenance Guide 

To ensure that the LED display products you use by Kechaixin can operate stably for a long time, extend their service life, and maintain the best display effect, please follow the following general maintenance and care suggestions. This guide is applicable to all types of LED display screens and LED conference一体machines under the Kechaixin brand. For specific operations， please refer to the "Product Manual" of the model you purchased. If you have any questions， please contact our customer service team. 

Part One: Daily Use and Operating Specifications 

1. Startup and shutdown sequence 

The correct sequence for turning on and off the device is crucial for protecting the circuitry of the display equipment. When powering on, please first turn on the video source device (such as a computer or player), wait for it to start normally, and then turn on the display or all-in-one machine power. When shutting down, the sequence is reversed: first turn off the display or all-in-one machine power, then turn off the video source device. This can prevent damage to the screen caused by sudden current shock. 

2. Requirements for Operating Environment 

The equipment should operate under the specified environmental conditions. Indoor products should avoid being installed near heat sources, steam, cooking fumes or flammable/explosive gases. Outdoor screens must ensure that their protection level (such as IP65) matches the installation environment. Common requirements include: 

Temperature and Humidity: Use within the specified temperature and humidity range as stated in the manual. Typically, it is -10℃ to 50℃ (the outdoor screen has a wider range). Relative humidity should be below 90% without condensation. Avoid internal condensation caused by sudden transfer of the device from a cold environment to a warm one. If moving is necessary, let it stand for several hours before powering on. 

Clean the environment: Keep the usage area clean to reduce the accumulation of dust and metal debris. Excessive dust can affect heat dissipation and circuit safety. 

Ventilation and Cooling: Around the equipment, especially near the ventilation openings, there should be sufficient cooling space (it is recommended to be more than 10 centimeters). It is strictly prohibited to cover or block them. Good cooling is the foundation for preventing components from aging too quickly. 

3. Recommended Runtime Duration 

Although our product design supports long-term continuous operation, to extend its overall lifespan, it is recommended to turn it off or set it to sleep mode during non-use periods (such as at night). For outdoor screens with high brightness operation, reasonable intermittent operation can help reduce light attenuation. 

4. Guidelines for Displaying Images 

Avoid having the screen display a static and extremely bright image for a long time (such as a pure white logo or a static logo), as this may cause the local pixels to age prematurely, resulting in "ghosting" or "screen burn". It is recommended to enable the screen saver or the dynamic content rotation function. 

It is recommended to adjust the screen brightness to a comfortable level that matches the ambient light. Excessive brightness not only consumes more power but also accelerates the aging of the light bulbs. 

Part Two: Cleaning and Maintenance Methods 

Regular and proper cleaning can maintain the clarity of the screen and prevent stains from corroding the surface. 

1. Cleaning cycle 

Depending on the amount of dust in the usage environment, it is recommended to perform a routine cleaning once every 1 to 3 months. In environments with a lot of sand and dust, or where there is a lot of cooking fumes, the cleaning frequency should be increased. 

2. Cleaning Tools and Materials 

Soft brush/duster: Used for initially removing dust from the screen surface and the joint gaps. 

Soft non-wrinkle fabric: such as lens cloth, ultra-fine fiber cloth. Do not use paper towels, towels, or hard fabrics. 

Special cleaning agent: It is recommended to use the special cleaning agent for electronic device screens. It is strictly prohibited to use any chemical reagents with strong corrosive or strong dissolving properties such as alcohol, ammonia water, acetone, ethyl acetate (such as ordinary glass cleaner, gasoline). 

3. Cleaning Steps (Taking the touch screen of the LED conference integrated machine as an example, the display screen is similar) 

Step 1: Power off. Make sure to turn off the device's power supply and remove the power plug. Allow the screen to cool completely. 

Step 2: Dust Removal. Use a soft-bristled brush to gently remove the dust particles from the frame and the screen surface, or use the soft-bristled suction head of a low-power vacuum cleaner to perform remote dusting. 

Step 3: Wet Wiping. Spray a small amount of the dedicated cleaner onto a soft cloth. Do not spray directly onto the screen. Gently wipe the screen surface and the body of the device in the same direction (clockwise or counterclockwise) with a slightly damp soft cloth. 

Step 4: Dry wipe. Immediately use another dry, soft, lint-free cloth to wipe away any remaining liquid and marks, ensuring that the screen is completely dry and free of water stains. 

Special Note: When cleaning the outdoor screen, be sure to check if the waterproof rubber ring on the module surface is aged or damaged. During the cleaning process, avoid strong water jets directly impacting the joint gap. When cleaning the touch screen, the action should be gentle to avoid heavy pressure. 

Part Three: Preliminary Self-Check for Common Faults 

When an anomaly occurs with the equipment, you can first carry out the following basic checks. Many problems can be resolved by yourself. 

1. The entire screen is not illuminated (no power supply) 

Check whether the main power switch is turned on and whether the power cord is securely plugged in. 

Check whether the air switches in the distribution cabinet or power sockets have tripped, and whether the power sockets are functioning properly. 

Confirm that the input voltage is within the range required by the device. 

2. There is power supply but the screen does not display (black screen) 

Check whether the video source device (such as a computer) is properly turned on and is outputting signals. 

Check whether both ends of the connection cables (such as HDMI, DP, DVI cables) are securely plugged in, and check if the cables themselves are damaged. Try replacing with a known good cable. 

Confirm whether the device's signal source selection (Input Source) is compatible with the port you are connecting to. 

3. Partial areas not lighting up, screen distortion or flickering 

First, check whether the power lines and signal lines in the corresponding area are loose. Then, reinsert and resecure them. 

Check whether the video source resolution and refresh rate are set within the optimal range supported by the device. 

For the composite screen, check the connection lines of individual modules or receiving cards. This operation involves the internal structure. If you have no experience, it is recommended to stop and contact customer service. 

4. Touch function malfunction (for conference display units) 

Confirm that the power supply of the touch box is connected and turned on (if there is an independent power source). 

Check whether the USB touch cable is securely connected to the computer main unit. 

Check if the touch device driver is functioning properly in the computer device manager and try recalibrating the touch screen. 

Make sure the screen surface is clean, without any water droplets or excessive stains that could affect the infrared sensing. 

Part Four: Long-term Disuse and Storage 

If the equipment needs to be out of use for an extended period (more than one month): 

Turn off the computer in the correct order and unplug all power cords. 

Pack the equipment and store it in an indoor environment that is dry, well-ventilated, and free from chemical gas corrosion. 

The recommended storage environment temperature and humidity should be consistent with the operating environment requirements, and extreme conditions should be avoided. 

Regular power-on maintenance: It is recommended to power-on and run for at least 2 hours every 2-3 months to remove moisture and maintain the activity of electronic components. 

Important Safety Reminder and Disclaimer 

Do not disassemble without professional knowledge: There are high-voltage components inside the equipment. Opening the case without authorization may result in electric shock or permanent damage, and it will also invalidate the warranty service. 

Immediately cut off power if exposed to water or foreign objects: If the equipment gets wet or comes into contact with any liquid, or if any foreign object falls into the cooling holes, please immediately cut off the power and unplug the plug, and contact professionals for handling. 

Thunderstorm Weather Protection: For outdoor screens or systems without adequate lightning protection measures, it is recommended to cut off the main power supply of the equipment during severe thunderstorm conditions to ensure safety. 

This guide provides general recommendations and cannot cover all specific situations. For the final operation and maintenance standards, please refer to the official "User Manual" of the specific product model you purchased. For any equipment damage caused by not following the instructions or improper maintenance, Kecaixin Company will not bear the warranty responsibility.