1. Introduction
This manual provides detailed instructions for the safe and effective use of the LASER TREE LT-4LDS-V2 DB Laser Module Driver Board. Please read this manual thoroughly before installation and operation to ensure proper functionality and safety.
2. Safety Information
WARNING: This product is a component for laser modules. Lasers can cause severe eye damage and skin burns. Always wear appropriate laser safety goggles when operating or working near laser equipment. Ensure the laser module is properly enclosed and operated in a controlled environment. Disconnect power before making any connections or adjustments.
- Always wear certified laser safety eyewear.
- Never look directly into the laser beam or its reflection.
- Ensure proper ventilation when operating laser equipment.
- Keep out of reach of children and unauthorized personnel.
- Operate in a well-lit area to avoid accidental exposure.
3. Product Overview
The LASER TREE LT-4LDS-V2 DB is a driver board designed to control compatible laser modules. It provides necessary power regulation and signal input for precise laser operation.

Figure 1: Top-down view of the LASER TREE LT-4LDS-V2 DB Driver Board. This image shows the overall layout of the LASER TREE LT-4LDS-V2 DB driver board, highlighting its compact design and various electronic components. Key features include the power input terminal, laser diode connectors, and mounting holes.
4. Specifications
| Feature | Specification |
|---|---|
| Model | LT-4LDS-V2 DB |
| Brand | LASER TREE |
| Material | Alloy Steel, Plastic |
| Item Weight | 1.13 ounces (approx. 32 grams) |
| Package Dimensions | 3.62 x 2.13 x 2.09 inches |
| Operation Mode | Automatic (for internal control logic) |
5. Setup and Installation
Follow these steps to correctly install and connect your LT-4LDS-V2 DB driver board to a compatible laser module and power supply.
- Power Disconnection: Ensure all power sources are disconnected from your laser system before beginning installation.
- Mounting: Securely mount the driver board in a stable location, away from excessive heat or moisture. Use the provided mounting holes if applicable.
- Connections: Refer to the connection diagram below for proper wiring.

Figure 2: Connection Diagram (Illustrative, similar to LT-4LDS-V2 DB). This diagram illustrates the dimensions (46mm x 46mm) and key connection points of a LASER TREE driver board, similar to the LT-4LDS-V2 DB. It identifies the FAN output, LD (Laser Diode) output, PWM input, GND (Ground), and VCC (Voltage Common Collector) / 12V power input terminals. This visual aid is crucial for correct wiring.
- Power Input (VCC/12V, GND): Connect a stable 12V DC power supply to the VCC/12V and GND terminals. Ensure correct polarity.
- Laser Diode Output (LD+, LD-): Connect your laser module's positive (LD+) and negative (LD-) terminals to the corresponding outputs on the driver board. Double-check polarity.
- PWM Input (PWM, GND): Connect the PWM signal from your control board (e.g., CNC controller) to the PWM terminal and its ground to the GND terminal. This signal controls the laser's power output.
- Fan Output (FAN): If your laser module requires a cooling fan, connect it to the FAN output terminals.
- Initial Power-Up: After all connections are verified, apply power to the system. Observe for any unusual behavior or indicators.
6. Operating Instructions
Once the driver board is correctly installed and connected, you can begin operating your laser module.
- Control Software: Use your laser control software (e.g., LightBurn, GRBL-compatible software) to send commands to your laser system.
- PWM Control: The laser power is typically controlled via the PWM signal. A higher PWM duty cycle generally corresponds to higher laser power. Adjust settings within your control software.
- Test Firing: Always perform a low-power test fire in a safe area to confirm proper operation and alignment before starting any engraving or cutting tasks.
- Monitoring: Continuously monitor the laser module and driver board during operation for any signs of overheating or malfunction.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your driver board.
- Cleaning: Keep the board free from dust and debris. Use a soft, dry brush or compressed air for cleaning. Do not use liquids.
- Connections: Periodically check all electrical connections to ensure they are secure and free from corrosion.
- Environment: Operate the board within its specified environmental conditions (temperature, humidity) to prevent damage.
- Inspection: Visually inspect the board for any signs of physical damage, burnt components, or loose connections.
8. Troubleshooting
If you encounter issues with your LT-4LDS-V2 DB driver board, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Laser not firing | No power to board; Incorrect wiring; Faulty laser module; No PWM signal. | Check 12V power supply; Verify all connections (VCC, GND, LD+, LD-); Test laser module separately; Check PWM signal from controller. |
| Laser power is weak or inconsistent | Low input voltage; Incorrect PWM settings; Damaged laser diode. | Ensure stable 12V power supply; Adjust PWM settings in software; Inspect laser diode for damage. |
| Board overheating | Insufficient cooling; Overcurrent; Short circuit. | Ensure fan is connected and working (if applicable); Verify laser module current draw is within limits; Check for short circuits in wiring. |
| Fan not working | Incorrect fan connection; Faulty fan. | Verify fan wiring to FAN terminals; Test fan independently. |
If the problem persists after attempting these solutions, please contact LASER TREE customer support.
9. Warranty and Support
For warranty information and technical support, please refer to the official LASER TREE website or contact your point of purchase. Keep your purchase receipt as proof of purchase.
Contact Information:
- Visit the LASER TREE Store on Amazon for product information and support resources.





