1. Introduction
This user manual provides detailed instructions for the setup, operation, and maintenance of your iSinbox JY821 Projector. Please read this manual thoroughly before using the projector to ensure proper functionality and to maximize your viewing experience. Keep this manual for future reference.

Figure 1.1: iSinbox JY821 Projector Overview
2. Product Overview and Features
The iSinbox JY821 Projector is designed for home entertainment, offering advanced features for an enhanced viewing experience. Key features include:
- Full 4K Decoding: Supports 4K resolution content for clear and detailed images.
- High Brightness: Delivers 1500 ANSI lumens for vibrant projections.
- Dolby Audio: Integrated Dolby membrane speaker technology with 36W speakers for immersive sound.
- Sealed Light Engine: A dust-proof system designed to prevent image degradation from dust buildup.
- Liquid Cooling Technology: An advanced cooling system for stable performance during extended use.
- Smart Auto System: Features automatic focus, 6D keystone correction, auto screen detection, and obstacle avoidance.
- Integrated Applications: Runs on a Linux operating system with pre-installed streaming platforms such as Netflix, Prime Video, YouTube, Disney+, Apple TV, and Hulu.
- Flexible Zoom: Offers 50%-100% digital zoom for adaptable placement.

Figure 2.1: Full 4K Decoding Capability

Figure 2.2: 36W Immersive Stereo Sound System
3. Setup Instructions
Follow these steps for initial setup of your iSinbox JY821 Projector:
- Placement: Position the projector on a stable, flat surface or mount it according to your preference. Ensure adequate ventilation around the device. The 50%-100% digital zoom allows for flexible placement relative to the screen.
- Power Connection: Connect the power cord to the projector and then to a power outlet.
- Power On: Press the power button on the projector or remote control to turn on the device.
- Automatic Adjustments: Upon power-on, the projector will automatically perform auto-focus and 6D keystone correction to achieve a clear and properly aligned image. It also features auto screen detection and obstacle avoidance.
- Network Connection: Navigate to the settings menu to connect the projector to your Wi-Fi network. This is necessary for accessing online streaming applications.

Figure 3.1: AI Auto Screen Alignment in action
4. Operating Instructions
The iSinbox JY821 Projector operates on a smart Linux-based operating system, providing access to various functions and applications.
4.1 Navigating the Smart OS
- Use the remote control to navigate through the on-screen menus.
- The home screen provides quick access to pre-installed streaming applications like Netflix, Prime Video, YouTube, Disney+, Apple TV, and Hulu.
- Additional applications can be downloaded or accessed via the web browser.

Figure 4.1: AI-Powered Smart Operating System
4.2 Adjusting Image and Sound
- Focus and Keystone: While automatic, manual adjustments can be made through the settings menu if desired.
- Zoom: Adjust the digital zoom (50%-100%) to fit the image to your screen size without moving the projector.
- Audio Settings: Access audio settings to fine-tune sound output, including volume and sound modes. The projector features Dolby Audio for enhanced sound quality.
5. Connectivity
The iSinbox JY821 Projector offers multiple connectivity options for various devices:
- Wi-Fi 6: For high-speed wireless internet access and streaming.
- Bi-directional Bluetooth 5.2: Connects to external Bluetooth speakers or headphones for audio output, or connects to your smartphone/tablet for content sharing.
- HDMI Ports: Connect gaming consoles, laptops, Blu-ray players, and other HDMI-enabled devices.
- USB Ports: For playing media from USB drives or connecting compatible accessories.
- 3.5mm Audio Jack: For connecting wired external audio devices.

Figure 5.1: Intelligent Bi-directional Bluetooth Connectivity
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your projector.
6.1 Dust Protection
The iSinbox JY821 features a fully sealed light engine, significantly reducing the risk of dust accumulation on optical components. This design minimizes the need for internal cleaning and helps maintain image clarity over time.

Figure 6.1: Fully Sealed Optical Chamber for Dust Protection
6.2 Cooling System
The projector incorporates a liquid cooling system designed for efficient heat dissipation. This system helps maintain stable operating temperatures and contributes to reduced noise levels during use.

Figure 6.2: Liquid Cooling Technology
6.3 General Care
- Keep the projector in a clean, dry environment.
- Clean the exterior with a soft, dry cloth. Avoid abrasive cleaners.
- Ensure ventilation ports are not obstructed.
7. Troubleshooting
If you encounter issues with your iSinbox JY821 Projector, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power | Power cord disconnected; Power outlet issue | Ensure power cord is securely connected. Test power outlet with another device. |
| No Image | Input source not selected; Lens cap on; Projector in standby mode | Select correct input source. Remove lens cap. Press power button to wake from standby. |
| Image Blurry | Auto-focus issue; Projector moved | Allow auto-focus to complete. If needed, manually adjust focus via settings. |
| Image Distorted (Trapezoid) | Keystone correction needed; Projector angle incorrect | Allow 6D auto keystone correction to complete. If needed, manually adjust keystone via settings. |
| No Sound | Volume too low; Muted; External audio device not connected | Increase volume. Unmute. Ensure external audio device is properly connected and selected. |
| Cannot Connect to Wi-Fi/Bluetooth | Incorrect password; Device out of range; Network issue | Verify password. Move projector closer to router/device. Restart router/projector. |
If the problem persists after attempting these solutions, please contact customer support.
8. Specifications
Below are the technical specifications for the iSinbox JY821 Projector:
- Brand: iSinbox
- Model: JY821
- Display Technology: LCD
- Native Resolution: 1920 x 1080 (Full HD)
- Supported Resolution: 3840 x 2160 (4K Decoding)
- Image Brightness: 1500 ANSI Lumens
- Image Contrast Ratio: 20000:1
- Aspect Ratio: 16:9, 4:3
- Noise Level: 32 Decibels
- Wattage: 95 watts
- Refresh Rate: 60 Hz
- Hardware Interface: 3.5mm Audio, Bluetooth, HDMI, USB
- Connectivity Technology: Bluetooth, HDMI, Wi-Fi, Wireless
- Compatible Devices: Gaming Console, Laptop, Smartphone, Speaker, Tablet
- Product Dimensions: 19.56 x 21.84 x 13.97 cm
- Item Weight: 2.22 kg
- Mounting Type: Tabletop Mount (also suitable for ceiling mounting)
9. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or contact the iSinbox customer service department. The product package includes an AV Cable, HDMI Cable, Power Cord, Remote, and this User Manual.





