1. Introduction
Thank you for choosing the NEBULA X1 Triple Laser 4K Projector. This manual provides essential information for setting up, operating, and maintaining your projector to ensure optimal performance and longevity. Please read this manual thoroughly before using the product and retain it for future reference.
2. Safety Instructions
- Laser Safety: Do not look directly into the projector lens when the projector is operating. The laser light can cause eye damage.
- Ventilation: Ensure adequate ventilation around the projector. Do not block ventilation openings. Overheating can lead to malfunction or fire.
- Power Source: Use only the provided power adapter. Ensure the power outlet voltage matches the projector's requirements.
- Water and Moisture: Do not expose the projector to rain, moisture, or any liquids.
- Cleaning: Disconnect the power before cleaning. Use a soft, dry cloth. Avoid abrasive cleaners.
- Placement: Place the projector on a stable, level surface. Avoid placing it in direct sunlight or near heat sources.
- Servicing: Do not attempt to repair this product yourself. Refer all servicing to qualified service personnel.
3. Package Contents
Verify that all items are present in your package:
- NEBULA X1 Triple Laser 4K Projector
- Remote Control
- Power Adapter
- User Manual (this document)
4. Product Overview
The NEBULA X1 is a compact and powerful triple laser 4K projector designed for home cinema. It features advanced imaging and sound technologies for an immersive viewing experience.

Figure 4.1: Front-right view of the NEBULA X1 Projector. The image displays the projector's main lens, the "NEBULA" branding on the front, a sturdy carrying handle on top, and ventilation grilles on the side. The overall design is sleek and modern in a dark gray finish.
Key Features:
- Triple Laser 4K Resolution (3840 x 2160)
- 3,500 ANSI Lumens Brightness
- 56,000:1 Contrast Ratio
- 40W Stereo Sound
- 0.9-1.5 Optical Zoom
- Smart AI for Auto Focus and Auto Obstacle Avoidance
- Dolby Vision Support
- Up to 300-inch Screen Size
- Built-In Micro Gimbal for flexible projection angles
- Integrated GTV (Google TV) for smart functionality
- Built-In Wi-Fi Connectivity
5. Setup
5.1 Placement
Position the projector on a flat, stable surface. For optimal viewing, ensure the projector is centered with your projection screen or wall. The 0.9-1.5 optical zoom allows for flexibility in projection distance relative to screen size.
5.2 Power Connection
- Connect the power adapter to the projector's power input port.
- Plug the other end of the power adapter into a suitable electrical outlet.
5.3 Initial Power-On and Auto-Adjustment
- Press the power button on the projector or the remote control to turn on the device.
- The projector will automatically perform auto-focus and auto-obstacle avoidance to optimize the image. The built-in micro gimbal will also adjust the projection angle for a level image.
- Follow the on-screen instructions for initial setup, including language selection and network connection.
6. Operating Instructions
6.1 Remote Control
Use the provided remote control to navigate the projector's interface. Familiarize yourself with the buttons for power, navigation, volume, and input selection.
6.2 GTV (Google TV) Interface
The NEBULA X1 runs on GTV, providing access to streaming apps, content recommendations, and Google Assistant. Navigate using the remote control's directional pad and select button.
6.3 Adjusting Settings
Access the settings menu to adjust image parameters such as brightness, contrast, color, and keystone correction (if manual adjustment is needed after auto-correction). You can also manage audio settings and network connections.
6.4 Dolby Vision
The projector supports Dolby Vision for enhanced HDR content. Ensure your content source also supports Dolby Vision for the best visual experience.
7. Connectivity
7.1 Wi-Fi Connection
- Go to the Settings menu on your projector.
- Select "Network & Internet" and then "Wi-Fi".
- Choose your desired Wi-Fi network and enter the password if prompted.
7.2 External Devices
The projector typically includes HDMI and USB ports for connecting external devices such as Blu-ray players, gaming consoles, or USB storage devices. Refer to the projector's physical ports for available connections.
- HDMI: Connect an HDMI cable from your external device to the projector's HDMI input. Select the corresponding HDMI input source from the projector's menu.
- USB: Insert a USB drive into the USB port to play media files directly.
8. Maintenance
8.1 Cleaning the Lens
Gently wipe the projector lens with a soft, lint-free cloth specifically designed for optical lenses. Do not use abrasive materials or chemical cleaners.
8.2 Ventilation
Regularly check that the ventilation openings are clear of dust and debris. Use a soft brush or compressed air to clean them if necessary. Ensure the projector has sufficient space around it for proper airflow.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No image displayed | Power cable disconnected; incorrect input source; projector in standby mode. | Check power connection; select correct input source; press power button. |
| Image is blurry | Auto-focus issue; lens dirty; projector too close/far from screen. | Initiate auto-focus manually; clean the lens; adjust projector distance. |
| No sound | Volume too low; audio output muted; external device audio settings. | Increase volume; unmute audio; check audio settings on source device. |
| Remote control not working | Batteries depleted; obstruction between remote and projector. | Replace batteries; ensure clear line of sight to projector's IR receiver. |
If the problem persists after trying these solutions, please contact customer support.
10. Specifications
| Feature | Specification |
|---|---|
| Brand | NEBULA |
| Model | D2351 (X1) |
| Display Technology | Triple Laser |
| Native Resolution | 3840 x 2160 (4K UHD) |
| Brightness | 3,500 ANSI Lumens |
| Contrast Ratio | 56,000:1 |
| Audio Output | 40W Stereo Sound |
| Optical Zoom | 0.9-1.5 |
| Smart Features | Smart AI (Auto Focus, Auto Obstacle Avoidance), Built-In Micro Gimbal, GTV (Google TV) |
| HDR Support | Dolby Vision |
| Connectivity | Wi-Fi, HDMI (assumed), USB (assumed) |
| Product Dimensions | 11 x 7.3 x 9.6 inches |
| Item Weight | 8 ounces |
11. Warranty and Support
The NEBULA X1 Triple Laser 4K Projector comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package or visit the official NEBULA website for detailed warranty terms and conditions.
For technical support, troubleshooting assistance, or service inquiries, please contact NEBULA customer support through their official website or the contact information provided in your product documentation.
Online Support: www.nebula.com/support





