How to Properly Handle a Damaged Built-in Power Supply in an LED Light Pole Screen

LED light pole screens play a vital role in smart city infrastructure. Their ability to deliver real-time public information, while maintaining energy efficiency and environmental friendliness, makes them a key urban asset. However, when the built-in power supply fails, the entire system can become inoperative and potentially hazardous if not handled properly. Here’s a practical guide to safely and effectively dealing with a damaged power supply.

1. Cut Power Immediately Upon Abnormalities

When you notice abnormalities such as screen blackouts, flickering, or sections of the screen not lighting up, a power supply issue may be the cause. The first and most crucial step is to disconnect the power immediately. Locate the distribution box responsible for the screen and follow correct shutdown procedures. If you’re unsure about its location, seek help from local utilities or management personnel. Never inspect or touch the equipment while it’s still powered, as this poses serious safety risks.

2. Assess the Condition of the Power Supply

Once power is off, begin a detailed inspection:

• Wiring Check: Look for damaged, burnt, or aged wires. If you detect cracks or looseness, replace them with wires of the same specification.
• Power Module Appearance: Check for bulging, burning, or deformation. These are strong indicators of internal damage.
• Voltage Testing: Use a multimeter to measure output voltage. Compare the readings with the standard operating voltage of the screen. If results are off, the power supply likely needs replacement.

Keep detailed records of your findings. Include symptoms, damaged parts, and any voltage readings. This documentation will help streamline repairs.

3. Choose a Suitable Repair Approach

Based on your assessment, decide on the appropriate next step:

• Minor Issues: If only input wires or fuses are affected and you have the proper skills, you may replace them yourself. Follow all electrical safety guidelines.
• Power Module Failure: If the power module itself is faulty, contact the screen manufacturer or a certified technician. Power modules involve complex internal circuits and should not be tampered with by untrained personnel.

Provide technicians with your recorded fault data so they can prepare necessary parts in advance.

4. Replace the Built-in Power Supply with the Correct Specifications

If replacement is needed, ensure that the new power supply matches the original in terms of rated power, voltage, and current. Only qualified professionals should carry out the replacement.

Steps include:

• Disassembly: Remove the faulty unit carefully. Keep all screws and connectors organized to avoid losing them.
• Installation: Secure the new power supply in place and reconnect input/output wires properly. Ensure firm connections with no loose ends.
• Final Check: Before turning the power back on, double-check all wiring and mounting to avoid errors.

5. Conduct a Power-On Test

The last step is to verify the success of your maintenance:

• Power on the unit and observe the LED screen.
• Ensure normal startup, stable display, and no flickering or distortion.
• Use test equipment to verify that voltage and current levels are within the correct range.

If any issue arises, turn off the power again and re-inspect the components until everything operates smoothly.

Final Thoughts

Handling a damaged built-in power supply on an LED light pole screen requires both caution and technical know-how. Always prioritize safety, document your inspection, and don’t hesitate to involve professionals when needed. Proper handling ensures the longevity and reliability of LED screens in smart city applications.