Introduction
This user manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your Lexmark MS510dn Compact Monochrome Laser Printer. Please read this manual thoroughly before using the printer to ensure optimal performance and longevity.

Figure 1: Front view of the Lexmark MS510dn Compact Monochrome Laser Printer.
Setup
1. Unpacking the Printer
Carefully remove the printer from its packaging. Ensure all packing materials, including tapes and protective films, are removed from the printer. Check the package contents against the packing list to confirm all components are present.
2. Connecting Power
- Connect one end of the power cord to the printer's power input.
- Plug the other end of the power cord into a grounded electrical outlet.
- Press the power button to turn on the printer.
3. Connecting to Network/Computer
The Lexmark MS510dn supports both Ethernet and USB connectivity.
- Ethernet Connection: Connect an Ethernet cable from your network router or switch to the Ethernet port on the back of the printer.
- USB Connection: Connect a USB cable from your computer to the USB port on the printer.

Figure 2: Rear view of the printer, highlighting connectivity ports.
4. Installing Toner and Imaging Unit
The printer uses a combined toner cartridge and imaging unit. Refer to the instructions provided with your toner cartridge for specific installation steps. Ensure the unit is securely latched into place.
5. Loading Paper
- Open the paper tray.
- Adjust the paper guides to fit the size of your paper.
- Load the paper stack into the tray, ensuring it is flat and not exceeding the maximum fill line.
- Close the paper tray.
6. Initial Software Setup
Insert the installation CD provided with your printer into your computer's CD/DVD drive, or download the latest drivers from the Lexmark official website. Follow the on-screen instructions to complete the driver and software installation.
Operating the Printer
1. Basic Printing
To print a document, open the document on your computer, select "Print" from the application's menu, choose the Lexmark MS510dn from the list of available printers, and click "Print".
2. Duplex Printing (Two-Sided Printing)
The MS510dn supports automatic duplex printing. To enable this feature, access the printer properties or preferences from your application's print dialog box and select the two-sided printing option.
3. Using the Control Panel and LCD Display
The printer features an intuitive control panel with an LCD display for easy navigation and status monitoring.

Figure 3: The printer's control panel and LCD display.
- Use the arrow buttons to navigate through menus.
- Press the OK button to select an option.
- The LCD displays printer status, error messages, and menu options.
Maintenance
1. Replacing the Toner Cartridge
When the toner level is low, the printer's LCD will display a warning. Follow these general steps to replace the toner cartridge:
- Open the front cover of the printer.
- Carefully remove the old toner cartridge and imaging unit assembly.
- Unpack the new toner cartridge and imaging unit. Gently shake it to distribute the toner.
- Insert the new assembly into the printer until it clicks into place.
- Close the front cover.
2. Cleaning the Printer
Regular cleaning helps maintain print quality and extends printer life.
- Exterior: Wipe the exterior with a soft, damp, lint-free cloth.
- Interior: Refer to the printer's internal cleaning instructions in the full user guide for specific components like the fuser or transfer roller.
3. Paper Jam Resolution
If a paper jam occurs, the printer's display will indicate the location of the jam. Follow the on-screen instructions or these general steps:
- Turn off the printer and unplug it.
- Open the access covers as indicated by the printer.
- Gently pull out any jammed paper in the direction of the paper path. Avoid tearing the paper.
- Close all covers, plug in, and turn on the printer.
Troubleshooting
Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Printer not responding | Loose cable connection, printer off, driver issue. | Check power and data cables. Ensure printer is on. Reinstall printer drivers. |
| "Unresponsive Imaging Unit [31.60]" error | Imaging unit not properly installed or faulty. | Open the front cover and re-seat the imaging unit. If the error persists, the imaging unit may need replacement. |
| Poor print quality | Low toner, dirty printer components, incorrect paper type. | Replace toner cartridge. Clean the printer. Use recommended paper. |
| Paper jams frequently | Incorrect paper loading, damaged paper, worn rollers. | Ensure paper is loaded correctly. Use new, undamaged paper. Clean paper rollers. |
![Lexmark MS510dn LCD showing 'unresponsive imaging unit [31.60]' error](unresponsive imaging unit [31.60].jpg)
Figure 4: Example of an error message displayed on the LCD screen.
Specifications
| Feature | Detail |
|---|---|
| Brand | Lexmark |
| Model Name | MS510dn |
| Printing Technology | Laser |
| Printer Output | Monochrome |
| Max Print Speed Monochrome | 45 ppm |
| Resolution | 1200 x 1200 dpi |
| Duplex Printing | Yes (Automatic) |
| Connectivity Technology | Ethernet, USB |
| Memory Storage Capacity | 256 MB |
| Max Input Sheet Capacity | 2000 (with optional trays) |
| Product Dimensions | 18.1 x 16.5 x 14.5 inches |
| Item Weight | 7.2 ounces (Note: This value is from the provided data and may not reflect actual product weight.) |
| Included Components | Inkjet Multifunction Office Machine (Note: This value is from the provided data; the product is a laser printer.) |
Warranty and Support
For detailed warranty information, please refer to the warranty card included with your product at the time of purchase or visit the official Lexmark website. Lexmark offers various support resources, including online documentation, FAQs, and customer service contact options.
For technical assistance or to inquire about service, please visit the Lexmark Store on Amazon or the official Lexmark support website.





