1. Important Safety Information & Professional Installation Warning
Warning! This product is intended for installation by professional electronic technicians only. Most motherboards require adjusting screen parameters, modifying programs via USB drive, or swapping data chip EEPROM. These tasks are complex and difficult for ordinary buyers. Incorrect installation or configuration can lead to product malfunction or damage. Disputes arising from improper installation, incorrect screen parameter adjustments, or purchasing the wrong model will not be eligible for refunds. Please ensure you possess the necessary technical knowledge or seek assistance from a qualified professional before proceeding.
If you are not a professional technician, please have a professional diagnose the TV malfunction before purchasing. Sometimes it is necessary to swap data chips such as EEPROM, write data with programmers, or adjust data screen parameters in factory mode.
2. Product Overview
The T.SK708D.81 is a versatile WiFi 4-core 4K driver board designed for upgrading and retrofitting Smart TVs. It features a powerful 4-core CPU, Mali-G31 MP2 GPU, 2GB of DDR RAM, and 16GB of eMMC Flash memory, enabling 4K resolution support and smart TV functionalities. This motherboard is suitable for various display equipment applications.
Figure 1: Top-down view of the T.SK708D.81 Smart TV Motherboard.
Figure 2: Angled view of the T.SK708D.81 Motherboard.
3. Specifications
| Feature | Specification |
|---|---|
| Model Number | T.SK708D.81 |
| CPU | Quad-Core A55 1.9GHz |
| GPU | Mali-G31 MP2 GPU |
| CPU Frequency | 1.9GHz |
| GPU Frequency | 800 MHz |
| DDR Size (RAM) | 1GB / 2GB (selectable) |
| eMMC Flash (ROM) | 8GB / 16GB (selectable) |
| Dimensions (WxHxD) | 15.9 x 2 x 12.8 cm |
| Weight | 0.12 kg |
| Package | Yes |
| Compatible Equipment Style | Display Equipment |
Figure 3: T.SK708D.81 board with 16GB eMMC Flash memory.
Figure 4: T.SK708D.81 board with 8GB eMMC Flash memory.
Figure 5: Hardware Configuration Details.
4. Installation and Setup
4.1 Physical Installation
Carefully handle the motherboard to avoid static discharge. Connect all necessary cables to the appropriate ports. Ensure secure connections for power, display, and peripheral devices.
Figure 6: Example of wiring connection to the motherboard.
4.2 Connector Definitions
Refer to the following diagrams for proper connection of power and inverter cables.
CNL4 (6PIN/2.0): Inverter Connector
| No. | Symbol | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | GND | Ground |
| 3 | ADJ/PWM | Brightness Adjustment for Panel |
| 4 | BL_ON | Back-Light ON/OFF Control for Panel |
| 5 | 12V | +12V DC Power Supply |
| 6 | 12V | +12V DC Power Supply |
Figure 7: CNL4 Inverter Connector Pinout.
CND4 (10PIN/2.54): Main Power Connector
| No. | Symbol | Description |
|---|---|---|
| 1 | 12V | +12V DC Power Supply |
| 2 | GND | Ground |
| 3 | 5V | Main +5V Power Supply |
| 4 | 5V | Main +5V Power Supply |
| 5 | PVCC | Power Supply for Panel |
| 6 | PVCC | Power Supply for Panel |
| 7 | GND | Ground |
| 8 | GND | Ground |
| 9 | PWON | Power On/Off, VOH≥3V (IOHMAX: 2mA), VOL≤0.8V (IOLMAX: 0mA) |
| 10 | 5VSB | +5V Power Supply when Standby |
Figure 8: CND4 Main Power Connector Pinout.
CNA8 (4PIN/2.54): AMP Power Connector
| No. | Symbol | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | GND | Ground |
| 3 | VCC | +12V/+24V AMP Power Supply |
| 4 | VCC | +12V/+24V AMP Power Supply |
Figure 9: CNA8 AMP Power Connector Pinout.
4.3 Software Configuration
After physical installation, the motherboard requires software configuration. This typically involves:
- Screen Parameter Adjustment: Access the factory menu to adjust display settings specific to your TV panel. This may include "Panel Division", "Color Depth", and "Mirror" settings.
- Firmware Update/Programming: If necessary, update the firmware using a USB drive or a dedicated programmer. This might involve swapping the EEPROM data chip.
- Language Setting: Configure the desired language for the Smart TV interface.
The video demonstrates accessing the factory menu and adjusting panel settings, as well as selecting the system language.
Video 1: Demonstration of T.SK708D.81 Smart TV Motherboard boot-up, menu navigation, panel settings, and language selection.
5. Operating Instructions
Once properly installed and configured, the T.SK708D.81 motherboard will power your Smart TV, providing access to various features:
- Smart Cloud TV Interface: Navigate through the intuitive user interface to access applications and settings.
- Input Selection: Switch between different input sources such as ATV, AV1, AV2, HDMI1, HDMI2.
- Applications: Access pre-installed applications like "App Store", "Browser", "TV Assistant", and "Miracast".
- Connectivity: Utilize the built-in WiFi for internet access and Miracast for screen mirroring.
The video demonstrates the initial boot screen displaying "WISDOM · SHARE Smart Cloud TV" and the main interface with various app icons and input options.
6. Maintenance
To ensure the longevity and optimal performance of your T.SK708D.81 motherboard:
- Keep Dry: Avoid exposure to moisture or liquids, which can cause short circuits and damage.
- Cleanliness: Periodically clean the board and surrounding area to prevent dust accumulation, which can lead to overheating. Use compressed air or a soft brush.
- Static Prevention: Always handle the board with anti-static precautions (e.g., anti-static wrist strap) to prevent damage from electrostatic discharge.
- Ventilation: Ensure adequate ventilation around the TV to prevent overheating of the motherboard components.
7. Troubleshooting
If you encounter issues with your T.SK708D.81 motherboard, consider the following troubleshooting steps:
- No Display/Incorrect Display:
- Verify all cable connections, especially the LVDS cable to the panel.
- Check the "Panel Setting" in the factory menu (refer to Section 4.3) for correct "Panel Division", "Color Depth", and "Mirror" settings. Incorrect settings are a common cause of display issues.
- Ensure the correct firmware is installed for your specific TV panel.
- No Power:
- Check the main power supply connections (CND4) and ensure the power source is functioning correctly.
- Verify the PWON signal.
- No Backlight:
- Check the inverter connector (CNL4) and ensure the BL_ON signal is present and the 12V supply is correct.
- Adjust "Backlight Value" and "Backlight PWM Freq" in the factory menu if available.
- No Audio:
- Verify the AMP power connector (CNA8) connections and ensure the VCC supply is correct.
- Check speaker connections.
- Smart Features Not Working (WiFi, Apps):
- Ensure the external WiFi antenna is properly connected (if applicable).
- Check network settings within the TV's operating system.
- A firmware re-flash might be necessary if software corruption is suspected.
For complex issues, it is highly recommended to consult a professional electronic technician. Attempting repairs without proper knowledge can cause further damage.
8. Warranty and Support
This T.SK708D.81 Smart TV Motherboard is provided by JINGSHUNLI LED LCD TV accessories Store. The seller offers pre-sales consultation and after-sales technical support. If you have any questions regarding installation, configuration, or troubleshooting, please contact the seller directly through the platform where you made your purchase.
Please note the warnings in Section 1 regarding professional installation. The seller tests all boards before shipping to ensure quality.
