1. Introduction
This manual provides essential information for the safe and effective replacement of LED backlight strips in compatible television models. These strips are designed to restore the display illumination of your TV. Please read all instructions carefully before proceeding with installation.
2. Product Specifications
| Feature | Detail |
|---|---|
| Type | Industrial Computer Accessories (TV LED Backlight Strip) |
| Model Numbers | 17DLB40VXR1, LB40017 (Compatible with Hitachi 40HBT42, 40HE1611, 40HE4001, 40HE4000, F40E4000, 40HB6T62H, 40HB6T62L, LT-40VF52M, LT40V550) |
| Length | 745mm |
| LED Beads per Strip | 7 or 8 (varies by strip type A/B) |
| LED Lamp Voltage | 3V per LED |
| Package Contents | 1 set = 3 pieces (typically 2x Type A, 1x Type B LED Strips) |
| Battery Included | No |
| High-concerned chemical | None |
| Certification | None |
| Origin | Mainland China |
3. Setup and Installation
Replacing TV LED backlight strips requires technical knowledge and careful handling. If you are not comfortable with electronic repairs, it is recommended to seek professional assistance.
3.1 Safety Precautions
- Always unplug the TV from the power outlet before beginning any disassembly or repair work.
- Discharge any residual power by holding the power button for a few seconds after unplugging.
- Wear anti-static gloves to prevent damage to sensitive electronic components.
- Work in a clean, well-lit area.
3.2 Compatibility Check
Before installation, it is crucial to verify that the new LED strips match the original ones in your TV. Even TVs of the same model can sometimes use different part numbers for their internal components.
- Open your TV and visually compare the new strips with the old ones.
- Match the part numbers printed on the strips. The provided strips are labeled 17DLB40VXR1 and LB40017.
- Ensure the number of LED beads, length, and connector types are identical.
3.3 Installation Steps (General Guide)
- Disassemble the TV: Carefully remove the TV's back panel, stand, and any other components necessary to access the display panel. Document screw locations and cable connections.
- Access the Display Panel: Remove the outer bezel and carefully lift the LCD panel and diffuser sheets to expose the existing LED backlight strips. Handle the LCD panel with extreme care to avoid damage.
- Remove Old Strips: Disconnect the power connectors from the old LED strips. Gently peel off the old strips, noting their exact placement and orientation.
- Install New Strips: Align the new LED strips (2x Type A, 1x Type B) in the exact positions of the old ones. Ensure they are securely seated and the adhesive (if present) makes good contact. Connect the power cables to the new strips.
- Test Functionality: Before reassembling, temporarily connect the TV to power and turn it on to verify that the new LED backlights illuminate correctly and evenly. Immediately unplug the TV after testing.
- Reassemble the TV: Carefully place the diffuser sheets and LCD panel back into position. Reattach the bezel, back panel, and any other components removed during disassembly. Ensure all screws are tightened appropriately and cables are reconnected.
4. Operating Instructions
Once installed, the LED backlight strips operate automatically as part of your television's display system. No specific user operation is required for the strips themselves.
5. Maintenance
These LED backlight strips are designed to be maintenance-free. Once installed, they are sealed within the TV's display assembly. Avoid exposing the strips to moisture or extreme temperatures during storage or installation.
6. Troubleshooting
6.1 Common Issues and Solutions
- No Backlight / Dim Screen:
- Ensure all connectors to the LED strips are securely attached.
- Verify that the power supply to the LED driver board is functioning correctly.
- Check for any visible damage to the new LED strips or their components.
- Uneven Lighting / Dark Spots:
- Ensure all diffuser sheets and the LCD panel are correctly seated and aligned.
- Check if any individual LED beads are not illuminating.
- Flickering Backlight:
- This could indicate an issue with the LED driver board or a faulty connection. Recheck connections.
If issues persist after troubleshooting, professional repair may be necessary.
7. User Tips
- Double-Check Part Numbers: Always verify the part numbers on your original LED strips against the replacement parts before purchasing and installing. TV models can have variations.
- Photograph Disassembly: Take photos at each step of the TV disassembly process. This will be invaluable for correct reassembly.
- Handle with Care: The LCD panel and diffuser sheets are fragile. Handle them gently and place them on a soft, clean surface to prevent scratches or damage.
- Organize Screws: Use small containers or a magnetic mat to keep track of different types and sizes of screws removed during disassembly.
8. Warranty and Support
For any questions regarding the product, installation, or to report a defect, please contact the seller or manufacturer directly. Keep your purchase records for warranty claims.
