1. Introduction
The BN44-00769A L40HF_EDY is a power supply and LED driver board designed for various Samsung TV models. It integrates the power supply and constant current functions to provide stable power to the television's internal components, including the LED backlight. This board is intended as a replacement part for compatible TV models.
2. Safety Information
- Always disconnect the television from the main power supply before attempting any installation or repair.
- Electronic components can store residual charge; exercise caution when handling.
- Only qualified technicians should attempt installation or repair. Improper handling can lead to electric shock or damage to the TV.
- Wear appropriate personal protective equipment, such as anti-static gloves, to prevent electrostatic discharge (ESD) damage to sensitive components.
3. Setup and Installation
This power supply board is a direct replacement part. Installation requires disassembling the television to access the internal components. Ensure the replacement board matches the original board's part number and physical layout.
- Preparation: Disconnect the TV from all power sources and external devices. Place the TV face down on a soft, clean surface to prevent screen damage.
- Access: Remove the back cover of the television to expose the internal circuit boards.
- Identify Old Board: Locate the existing power supply board. It is typically the largest board connected directly to the AC input.
- Disconnect Cables: Carefully disconnect all cables connected to the old power supply board. These include power cables, signal cables, and LED backlight cables. Note their positions for reassembly.
- Remove Old Board: Unscrew and remove the old power supply board from the TV chassis.
- Install New Board: Place the new BN44-00769A L40HF_EDY board into position and secure it with the screws.
- Reconnect Cables: Reconnect all cables to their corresponding ports on the new board. Refer to the images below for connector locations and board layout.
- Initial Test: Before fully reassembling, connect the TV to power and perform a brief test to ensure basic functionality (e.g., power on, backlight illuminates).
- Reassembly: If the test is successful, disconnect power and reattach the TV's back cover.
Figure 3.1: Front view of the power supply board, showing component layout.
Figure 3.2: Back view of the power supply board, illustrating the circuit traces.
Figure 3.3: Detail of various connectors (CNM803, CNL802) and jumper points (JP802, JP807, JP801, JP907, JP903) on the board.
4. Operating Principles
The BN44-00769A L40HF_EDY power supply board functions automatically once installed correctly and the television is powered on. It converts the incoming AC power to the various DC voltages required by the TV's main board, T-con board, and other components. It also regulates the current for the LED backlight, ensuring proper illumination.
No direct user interaction or configuration is required for the power supply board itself.
5. Maintenance
This power supply board is a sealed electronic component and contains no user-serviceable parts. To ensure its longevity and proper function:
- Keep the television in a dry, well-ventilated environment.
- Avoid exposing the TV to extreme temperatures or humidity.
- Prevent physical impact or damage to the television, which could affect internal components.
- Do not attempt to clean the internal board with liquids or abrasive materials.
6. Troubleshooting
If your television experiences issues after replacing the power supply board, consider the following:
- No Power: Double-check all cable connections to ensure they are secure and correctly seated. Verify that the AC input cable is firmly connected to the board and the wall outlet.
- No Backlight (Sound but no picture): Ensure the LED backlight cable is properly connected to the board. This board also functions as an LED driver, so issues here could indicate a problem with the LED strips or the board itself.
- Intermittent Power: Loose connections or a faulty power outlet can cause intermittent power.
- Incorrect Part: Confirm that the installed board is the correct model (BN44-00769A L40HF_EDY) for your specific TV model. Slight variations can cause incompatibility.
If troubleshooting steps do not resolve the issue, it is recommended to consult a professional TV repair technician. The seller performs testing on all boards before shipment and can provide test videos upon request.
7. Specifications
| Feature | Detail |
|---|---|
| Product Name | TV Power Supply Board (LIPS)/LED |
| Part Model | BN44-00769A |
| Type | Power Supply Constant Current Integration |
| Brand | TjYuze |
| Is Customized | No |
| Origin | Mainland China |
| Input Voltage | 100-240V~, 2.1A, 50/60Hz |
| Output Voltage (CNM803) | A13V (12.8V) === 3.08A |
| LED Output (CNL802) | 151.6V === 425mA |
| Package Dimensions (approx.) | Length: 23 cm, Width: 18 cm, Height: 4 cm |
| Package Weight (approx.) | 0.42 kg |
Figure 7.1: Detail of the AC input connector and fuse, indicating 100-240V input.
Figure 7.2: Detail showing output voltage and current specifications for 13V and LED connections.
Figure 7.3: Close-up of the board's label, confirming part number BN4400769A.
Compatible TV Models (including but not limited to):
- SAMSUNG: UA40FH5000KXWT, UA40FH5000RXEG, UA40FH5000RXTW, UA40FH5000RXZN, UA40H5303AKXXS, UA40H5303AKXXT, UA40H5303ARXEG, UA40H5303ARXTW, UA40H5303ARXUM, UA40H5303AWXRD, UN39H5204AFXZA, UN40H5003AFXZA, UN40H5003AFXZC, UN40H5003BFXZA, UN40H5003BFXZC, UN40H5201AFXZA (Versions: LD05, VD10), UN40H5203AFXZA (Versions: TD01, VF11, LD04), UN40H5203AFXZC, UN40H5303AFXZP, UN40H5303AGXPE, UN40H5303AGXUG, UN40H5303AGXZD, UN40H5303AGXZS, UN40H5303AHXPA, UN40H5303AKXZL, UN40JH5005FXZP, UN40JH5005GXPE, UN40JH5005GXPR, UN40JH5005HXPA
8. Warranty and Support
This product comes with a 90-day warranty from the date of purchase. The seller ensures that all power boards are tested and confirmed to be working normally before shipment. Test videos can be provided upon request.
If your specific TV model is not listed in the compatibility section, please contact the seller for consultation to confirm compatibility before purchase.
Returns are accepted; however, the buyer is responsible for any transportation costs incurred for returns.
9. User Tips
- Verify Part Numbers: Always compare the part number on your existing board with the BN44-00769A to ensure a correct match. Even slight model variations can require different boards.
- Visual Inspection: Before installation, carefully inspect the new board for any visible damage during transit.
- Professional Installation: While installation is described as 'simple' for experienced individuals, if you are unsure about the process, it is highly recommended to seek professional assistance to avoid damage to the board or your television.
- Photo Discrepancies: Be aware that there may be minor visual differences between product photos and the actual item. Always rely on the part number for compatibility.
