1. Product Overview
This manual provides instructions for replacing the 6.8-inch 9K Monochrome LCD screen in your Elegoo Mars 4 Ultra or Elegoo Mars 4 3D printer. The replacement screen is manufactured by Chitu Systems.
Image 1.1: Elegoo Mars 4 Ultra 9K LCD Screen Replacement
Package Contents
- 6.8 inch 9K Monochrome LCD Screen (Chitu Systems)
- Ribbon Cable (if included with specific kit)
- Adhesive Tape (if included with specific kit)
Image 1.2: Typical package contents for the LCD replacement kit.
2. Safety Precautions
- Always power off and unplug your 3D printer before performing any maintenance or part replacement.
- Wear appropriate personal protective equipment, such as gloves, to avoid fingerprints or damage to the screen.
- Handle the LCD screen and ribbon cable with extreme care to prevent damage.
- Keep small parts away from children.
3. Installation Guide
Follow these steps carefully to replace the LCD screen in your Elegoo Mars 4 Ultra or Mars 4 3D printer.
- Prepare the Printer: Power off your 3D printer and unplug it from the power source. Remove the resin vat and build plate.
- Remove Bottom and Middle Board Screws: Loosen and remove the four screws located on the bottom and middle board of the printer. These typically include bottom screws, platform screws, and a back screw.
- Unplug Screen Cables: Carefully unplug the cables connected to the touchscreen and the existing LCD screen.
- Unbuckle Side Component: Unbuckle the component from the right side of the printer's internal structure.
- Unplug Motherboard Connections: Unplug the fan, motor, and limit switch plugs from the motherboard.
- Remove Old Screen: Slowly push out the original screen from the bottom of its housing.
- Install New Screen: Carefully feed the cable of the new LCD screen through the designated gap first, then gently place the screen into its position.
- Apply Masking Tape: Apply masking tape to the edges of the new screen, ensuring the holes for the screws are properly aligned and accessible.
- Reinstall Center Panel: Install the entire center panel back into the printer.
- Secure Screws: Screw in all the screws that were removed in step 2 to secure the printer's casing.
Image 3.1: Loosen and remove the 4 screws on the bottom and middle board.
Image 3.2: Unplug the cable from the touchscreen and LCD screen.
Image 3.3: Unbuckle from the right side.
Image 3.4: Unplug the fan, motor, and limit plugs from the motherboard.
Image 3.5: Slowly push out the original screen from the bottom.
Image 3.6: Put the cable through the gap first, and then place the screen down.
Image 3.7: Apply masking tape to the edge and place the holes for the screws.
Image 3.8: Install the whole center panel.
Image 3.9: Screw in all the screws.
4. Operating and Testing
After installation, it is crucial to perform an exposure test to ensure the new LCD screen is functioning correctly.
Exposure Test
- Plug in and power on your 3D printer.
- Navigate to the printer's menu: Tool → Screen → Text.
- The printer will display a test pattern or text on the LCD screen. Verify that the entire screen illuminates evenly and that there are no dead pixels, lines, or unlit areas.
Image 4.1: Navigate to the exposure test menu.
Image 4.2: Perform an exposure test to check screen functionality.
5. Maintenance
- Keep the LCD screen clean from resin spills and dust. Use a soft, lint-free cloth and isopropyl alcohol for cleaning.
- Avoid touching the screen surface directly with bare hands to prevent fingerprints and oils.
- Ensure the printer's cover is in place when not in use to protect the screen from UV light and dust.
6. Troubleshooting
Common Issues and Solutions
- Screen does not turn on or displays incorrectly:
- Double-check all cable connections, especially the ribbon cable to the LCD and motherboard. Ensure they are securely seated.
- Perform the exposure test (Section 4) to diagnose if the screen is receiving power and data.
- If parts of the image are not displayed or gradually disappear, this may indicate a faulty screen or a loose connection.
- Screen flickering or intermittent display:
- Ensure the ribbon cable is not bent or damaged. A bent cable can cause intermittent connections.
- Verify that the screen is properly seated in its housing and not under undue pressure.
If issues persist after checking connections and performing the exposure test, please refer to the Warranty and Support section for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Item Type | Module (LCD Screen) |
| Screen Size | 6.8 inches |
| Resolution | 9K Monochrome |
| Compatibility | Elegoo Mars 4 Ultra, Elegoo Mars 4 |
| Brand Name | Chitu Systems |
| Origin | Mainland China |
| Package Weight | 0.5 kg |
| Package Dimensions (L x W x H) | 29 cm x 25 cm x 7 cm |
8. User Tips
- Check Cable Condition: Before final installation, carefully inspect the ribbon cable for any bends or damage. Some users have noted that a slightly bent cable can still function but it's best to ensure it's in optimal condition.
- Pre-Installation Test: If possible, perform a quick test of the screen before fully reassembling the printer to confirm it's working.
- Compatibility Confirmation: This screen is confirmed to be compatible with both the Elegoo Mars 4 and Mars 4 Ultra models.
- Quality Assurance: Chitu Systems products are generally regarded as high quality by users.
9. Warranty and Support
Chitu Systems is committed to providing customers with the best shopping experience. If you encounter any concerns or issues with your LCD screen replacement, please contact technical support directly.
Technical Support
For technical assistance, please contact our technical colleague at support@cbd-3d.com. They will resolve your issue promptly.
Image 9.1: Chitu Systems Customer Support Information.
Additional Resources
A detailed user manual in PDF format may be available for download. You can often find this on the product page or by contacting support. For this product, a user manual (PDF) is available here.