LED Backlight Strip Instruction Manual

1. Introduction

This manual provides detailed instructions for the replacement of LED backlight strips compatible with various 43-inch Vestel and Hitachi television models. These LED bar lights are designed to restore the display functionality of your TV. Please read all instructions carefully before proceeding with installation.

2. Product Specifications

3. Compatibility

These LED backlight strips are compatible with various 43-inch TV models. To ensure correct fitment, it is crucial to verify either your TV's model number or the existing light strip codes.

3.1 Applicable TV Models

If your TV has not been opened, compare the model number found on the nameplate on the back of your TV. Refer to the image below for an example of a TV model label.

• Hitachi: 43HK15T74U, 43HK6T74U, 43HK5W64, 43F501HK6000, LUX0143004, 43HK15W64, 43HK6000, 43HK15W64I, 43HK4W64, 43HK6W64, 43HL15W64, 43HK6T74U, 43U6763DA, 43U5766DB, 43U6663DB
• Digihome: 43292UHDFVP
• JVC: LT-43C862, LT-43C870
• Other: 43PUS6031/12

3.2 Compatible Light Strip Codes and Panel Information

If you have already opened your TV, compare the codes found on your existing light bars or screen panel. The following codes are compatible:

• 17DLB43VER3-A ETI 20180308
• 17DLB43VER3-B ETI 20180308
• VESTEL 43" DRT UHD A-Type REV0.3
• VESTEL 43" DRT UHD B-Type REV0.3
• XVESTEL 43" DRT UHD A-TYPE REV0.3
• XVESTEL 43" DRT UHD B-TYPE REV0.3
• SVV430A57_A_REV00_170407
• SVV430A57_B_REV00_170407

Compatible Matrix (Screen Panel): VES430QNDL-2D-U11

Kit Composition: This set typically includes 2 'A' type strips (817 mm with 8 LEDs each) and 2 'B' type strips (817 mm with 9 LEDs each).

4. Installation Guide

Replacing TV backlight strips requires technical skill and careful handling. If you are not comfortable performing this repair, it is recommended to seek professional assistance.

4.1 Safety Precautions

• Always unplug the TV from the power outlet before beginning any 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.
• Keep small screws and parts organized to avoid loss.

4.2 Step-by-Step Replacement

1. Prepare the TV: Place the TV face down on a soft, clean surface to protect the screen.
2. Remove the Back Cover: Unscrew and carefully remove the TV's back cover.
3. Disconnect Cables: Disconnect all cables connected to the main board, power supply board, and T-con board. Pay special attention to the ribbon cables for the display panel.
4. Remove Internal Components: Carefully remove any circuit boards, speakers, or other components that obstruct access to the display panel.
5. Remove the Bezel and Frame: Detach the front bezel and any internal frames that hold the display panel in place.
6. Remove the LCD Panel: This is the most delicate step. Carefully lift and remove the LCD panel. It is highly fragile and can crack easily. Store it safely, face down on a soft, clean surface.
7. Remove Diffuser Layers: Beneath the LCD panel, there are several diffuser sheets. Carefully remove these, noting their order and orientation.
8. Access Old Backlight Strips: The old LED backlight strips will now be visible, usually attached to the metal chassis.
9. Remove Old Strips: Disconnect the power connectors from the old LED strips and carefully peel them off the chassis. Note the placement of A and B type strips.
10. Install New Strips: Clean the chassis surface. Carefully place the new LED strips in the correct positions, ensuring they align with the light guides. Connect the power cables.
11. Test New Strips: Before reassembling, temporarily connect the TV to power and turn it on to verify that all new LED strips illuminate correctly. Immediately unplug after testing.
12. Reassemble: Reinstall the diffuser layers, LCD panel, bezel, internal components, and back cover in reverse order. Ensure all cables are reconnected securely.

5. Operation

Once the LED backlight strips are successfully installed, the TV's backlight functionality will be restored. The operation of the backlight is automatic and controlled by the TV's internal systems. Simply power on your television as usual.

6. Care and Maintenance

• Cleaning: No specific maintenance is required for the LED strips themselves once installed. For general TV cleaning, always use a soft, dry cloth on the screen and exterior.
• Avoid Impact: Protect your TV from physical impact, which can damage internal components, including the backlight.
• Ventilation: Ensure adequate ventilation around your TV to prevent overheating, which can prolong the life of all electronic components, including the LED backlights.

7. Troubleshooting

If you encounter issues after replacing the LED backlight strips, consider the following:

• No Backlight / Dim Screen:
  • Ensure all LED strip connectors are firmly seated.
  • Verify that the power supply board is functioning correctly and providing power to the LED driver circuit.
  • Check for any visible damage to the new LED strips or their connections.
• Partial Backlight / Dark Spots:
  • This often indicates one or more individual LEDs or a section of a strip is not functioning. Re-check connections for the affected strips.
  • Ensure the diffuser layers were reinstalled correctly and are not blocking light.
• Flickering Backlight:
  • Could be a loose connection or an issue with the LED driver circuit on the power supply board.
• TV Not Turning On:
  • Double-check all internal cable connections, especially those to the main board and power supply.
  • Ensure no screws or tools were left inside the TV that could cause a short circuit.

If troubleshooting steps do not resolve the issue, professional repair may be necessary.

8. Warranty and Support

For any questions regarding the product, installation, or potential defects, please contact the seller directly through your purchase platform. Keep your order details readily available for faster assistance.