1. Introduction
The TEKLEAD T-D3H 2D Desktop Barcode Scanner is an advanced imaging device designed for efficient barcode reading in various commercial environments such as supermarkets, retail shops, and pharmacies. It utilizes cutting-edge CMOS imaging technology and an intelligent image recognition system, featuring a 1 million pixel global high-definition camera. This scanner is capable of easily reading both 1D and 2D barcodes from paper, physical commodities, and digital screens, offering fast and reliable performance.
2. Setup Guide
The TEKLEAD T-D3H barcode scanner is designed for plug-and-play operation, requiring no special driver installation for most systems.
- Unpacking: Carefully remove the scanner and its USB cable from the packaging.
- Connect the Cable: Locate the USB port on the back of the scanner. Connect one end of the provided USB cable to this port.
- Connect to Host Device: Plug the other end of the USB cable into an available USB port on your computer or point-of-sale (POS) system. The scanner will typically power on automatically and emit a short beep, indicating it is ready for use.
- Placement: Place the scanner on a stable, flat surface. Its hand-free vertical design allows for convenient, stationary scanning.


3. Operating Instructions
The TEKLEAD T-D3H scanner is designed for ease of use, providing a hands-free scanning experience.
- Power On: Once connected via USB, the scanner will automatically power on. A blue indicator light may illuminate, and a short beep confirms readiness.
- Scanning a Barcode: Position the item with the barcode facing the scanner's window. The scanner will automatically detect the barcode and emit a red scanning light. A successful scan is typically indicated by a beep and the data being transmitted to your connected system.
- Hands-Free Operation: Utilize the vertical design by simply passing items over the scanning window. This allows for quick and efficient processing without needing to pick up the scanner.
- Barcode Types: The scanner supports a wide range of 1D and 2D barcodes, including those that are damaged, fuzzy, color-coded, reflective, or poorly printed.



4. Maintenance
To ensure optimal performance and longevity of your TEKLEAD T-D3H barcode scanner, follow these simple maintenance guidelines:
- Cleaning the Scanning Window: Regularly wipe the scanning window with a soft, lint-free cloth. For stubborn smudges, slightly dampen the cloth with a mild, non-abrasive cleaner. Avoid harsh chemicals or abrasive materials that could scratch the surface.
- General Cleaning: Keep the exterior of the scanner clean by wiping it with a dry or slightly damp cloth. Ensure no liquids enter the device.
- Cable Inspection: Periodically check the USB cable for any signs of wear, cuts, or damage. Replace if necessary to prevent connectivity issues.
- Storage: When not in use for extended periods, store the scanner in a clean, dry environment away from extreme temperatures and direct sunlight.
The scanner features an anti-fall design with ABS material construction, enhancing its durability and resistance to accidental impacts.


5. Troubleshooting
If you encounter issues with your TEKLEAD T-D3H scanner, refer to the following common troubleshooting steps:
- Scanner Not Responding:
- Ensure the USB cable is securely connected to both the scanner and the host device.
- Try connecting the scanner to a different USB port on your computer.
- Restart your computer or POS system.
- Barcode Not Scanning:
- Verify the barcode is clean, undamaged, and clearly visible.
- Ensure the barcode is within the scanner's field of view and at an appropriate distance.
- Check if the barcode type is supported by the scanner (most standard 1D and 2D codes are).
- Ensure there is adequate lighting, but avoid direct glare on the barcode.
- No Data Output to Application:
- Confirm that the cursor is active in the input field of your application (e.g., notepad, POS software).
- Check your computer's device manager to ensure the scanner is recognized as a Human Interface Device (HID) or COM port, depending on its configuration.
- Incorrect Data Scanned:
- Ensure the barcode is not partially obscured or damaged, which could lead to misreads.
- If using a specific software, check its settings for barcode input.
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | TEKLEAD |
| Model Number | T-D3H |
| Product Type | Bar Code Scanner |
| Scanning Light Source | LED |
| Scan Element Type | CMOS |
| Optical Resolution | 1280 * 800 |
| Scan Speed | 100 scans/second |
| Interface Type | USB/RS232(COM) |
| Drive | No need Drive |
| Size | 93 * 89.6 * 171mm |
| Power | DC 5V 1A |
| Certification | CE, FCC, RoHS |
| Origin | Mainland China |
| Scan Breadth | A4 |
7. User Tips
- Optimize Placement: Position the scanner in a central location on your counter for easy access and to maximize the benefit of its hands-free design.
- Steady Scanning: While the scanner is robust, ensure items are passed smoothly over the scanning window for the quickest and most accurate reads.
- Leverage Versatility: Don't hesitate to scan barcodes from various surfaces, including mobile phone screens, as the 1 million pixel camera is designed for this flexibility.
- Stability First: The antiskid design helps keep the scanner in place. Ensure it's on a clean, dry surface for maximum stability during busy periods.
8. Warranty and Support
TEKLEAD provides online technical support for the T-D3H 2D Desktop Barcode Scanner. For any technical assistance or inquiries, please refer to the official TEKLEAD support channels. When contacting support, please have your model number (T-D3H) ready.





