1. Introduction
Thank you for choosing the onscersoco D9 Smart TV Box. This device transforms your television into a smart entertainment hub, offering 4K HD video playback, access to various applications, and seamless media streaming. This manual provides essential information for setting up, operating, and maintaining your TV box to ensure optimal performance and an enjoyable user experience.
2. Safety Information
- Do not expose the device to water, moisture, or extreme temperatures.
- Use only the provided power adapter to prevent damage.
- Avoid placing the device near heat sources or in direct sunlight.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified service personnel.
- Keep the device and accessories out of reach of children.
3. Package Contents
Please check the box for the following items:
- 1 x onscersoco D9 Smart TV Box
- 1 x 12V/1A Power Adapter
- 1 x HDMI Compatible Cable
- 1 x Remote Control
- 1 x User Manual (this document)

4. Product Overview
The D9 Smart TV Box is designed for ease of use and high-quality media consumption. Below is an overview of the device and its connection ports.

4.1. Ports and Connections
- HDMI Output: Connects to your TV or display for video and audio. Supports up to 4Kx2K display.
- USB Interface: Two high-speed USB 2.0 ports for connecting U disks, external hard drives, or other USB peripherals.
- AV Output: A 3-in-1 port for connecting to older televisions using composite video and stereo audio cables.
- LAN (RJ45): Ethernet port for wired network connection (10M/100M).
- DC 12V/2A: Power input port.
5. Setup Guide
Follow these steps to set up your D9 Smart TV Box:
5.1. Connecting to Your TV
- Connect one end of the HDMI cable to the HDMI port on the D9 Smart TV Box.
- Connect the other end of the HDMI cable to an available HDMI input port on your television. Note the HDMI input number (e.g., HDMI 1, HDMI 2).
- If using an older TV, connect the AV cable (not included, if applicable) from the AV output port on the TV box to the corresponding input ports on your TV.
5.2. Powering On
- Connect the provided 12V/1A power adapter to the DC 12V/2A port on the TV box.
- Plug the power adapter into a wall outlet.
- Turn on your television and select the correct HDMI input source that corresponds to where you connected the TV box.
- The TV box should automatically power on and display the boot-up screen.

5.3. Initial Configuration
- Upon first boot, you may be prompted to select your preferred language. Use the remote control to navigate and select.
- Network Connection:
- Wi-Fi: Go to Settings > Network > Wi-Fi, select your network, enter the password, and connect. The device supports 2.4G and 5.8G Wi-Fi.
- Ethernet: If you connected an Ethernet cable, the device should automatically detect and connect to the wired network.
- Follow any on-screen prompts to complete the initial setup, including time zone and Google account login (optional, but recommended for app access).
6. Operating Instructions
Your D9 Smart TV Box runs on Android 10.0, providing a familiar interface for navigation and app usage.
6.1. Remote Control Usage
The included remote control allows you to navigate the Android interface. Common buttons include:
- Power: Turns the device on/off or puts it into standby.
- Directional Pad (D-Pad): Navigates through menus and selects items.
- OK/Enter: Confirms selections.
- Back: Returns to the previous screen.
- Home: Returns to the main home screen.
- Volume +/-: Adjusts audio volume.
6.2. Navigating the Interface
The home screen provides quick access to installed applications, settings, and media content. Use the D-Pad on your remote to move between icons and press OK to launch an application or enter a menu.
6.3. Using Applications
The D9 Smart TV Box comes with pre-installed applications like Kodi 18.1 and supports services like YouTube. You can download additional apps from the Google Play Store (if available and configured) or other sources.
- Launching Apps: Select the app icon from the home screen or app drawer and press OK.
- YouTube: Access a vast library of videos.
- Kodi: A powerful media center for playing local and network media.
6.4. Media Playback
The device supports various video, audio, and photo formats, including 4K@60fps H.265 video. You can play media from connected USB devices or network shares (DLNA file sharing is supported).
7. Maintenance
7.1. Cleaning
To clean the device, unplug it from the power source. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or abrasive materials.
7.2. Software Updates
The device's specifications indicate that System Upgrade and OTA (Over-The-Air) Update features are not supported. Therefore, manual updates may not be available or are not officially provided.
8. Troubleshooting
If you encounter issues with your D9 Smart TV Box, refer to the following common problems and solutions:
| Problem | Possible Solution |
|---|---|
| No power/Device not turning on | Ensure the power adapter is securely connected to the device and a working power outlet. Try a different outlet. |
| No picture on TV | Verify the HDMI cable is securely connected to both the TV box and the TV. Ensure your TV is set to the correct HDMI input source. Try a different HDMI cable or port. |
| Remote control not working | Check if the batteries are correctly inserted and have sufficient charge. Ensure there are no obstructions between the remote and the TV box. |
| Cannot connect to Wi-Fi | Check your Wi-Fi password. Ensure the TV box is within range of your Wi-Fi router. Restart your router and the TV box. |
| Apps are slow or freezing | Close unused applications. Clear app caches (Settings > Apps > [App Name] > Clear Cache). Restart the TV box. |
9. Specifications
Detailed technical specifications for the D9 Smart TV Box:
| Category | Specification |
|---|---|
| Model | D9 Smart TV Box |
| Operating System | Android 10.0 |
| CPU | Amlogic S905L2, Quad-core ARM Cortex-A53 up to 1.5 GHz |
| GPU | Penta-core Mali-450 750MHz |
| Memory (RAM) | 1GB DDR3 |
| Internal Storage (ROM) | 8GB eMMC |
| Max. Extended Capacity | TF Card Up To 32GB |
| Wi-Fi | 2.4G/5.8G (802.11n) |
| Bluetooth | Not supported |
| Max Output | 4K @ 60 Hz |
| Video Decoder Formats | 4K, H.265, MPEG1/2/4, H.264, HD AVC/VC-1, RM/RMVB, Xvid/DivX3/4/5/6, RealVideo8/9/10 |
| Video Formats | 4K@60fps, H.265, AVI, H.264, VC-1, MPEG-2, MPEG-4, DIVD/DIVX, Real8/9/10, RM, RMVB, PMP, FLV, MP4, M4V, VOB, WMV, 3GP, MKV |
| Audio Formats | MP1, MP2, MP3, WMA, OGG, AAC, M4A, FLAC, APE, AMR, RA, WAV, DTS |
| Photo Formats | JPEG/BMP/GIF/PNG/TIFF |
| Supported Internet Services | YouTube, Skype Chat, Picasa, Flicker, Facebook, Online Movies, etc. |
| DLNA | DLNA file sharing supported |
| Interfaces | HDMI 2.0, 2x USB 2.0, AV (3-in-1), RJ45 (10M/100M), DC Power Input |
| Power Supply | DC 12V/2A |
| Working Temperature | -10~40℃ |
| Storage Temperature | -20~50℃ |
| Humidity Environment | 5%-90% (non-condensing) |
| Dimensions (approx.) | 19 cm (Length) x 12 cm (Width) x 5 cm (Height) |
| Weight (approx.) | 0.35 kg |


10. User Tips
- For the best streaming experience, use a wired Ethernet connection if possible, especially for 4K content.
- Keep your remote control pointed directly at the TV box for optimal responsiveness.
- Regularly clear the cache of frequently used apps to maintain performance.
- Consider connecting a wireless keyboard and mouse for easier navigation and text input, especially when using web browsers or chat applications.
11. Warranty and Support
The onscersoco D9 Smart TV Box comes with a standard manufacturer's warranty. Please retain your proof of purchase for any warranty claims. For technical support or further assistance, please contact the seller or refer to the official product support channels.
12. Regulatory Compliance
This device complies with relevant regulatory standards for electronic equipment. Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate the equipment.





