B420dn - Printer OKI - Free user manual and instructions
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| Product Type | Monochrome Laser Printer |
| Model | B420dn |
| Brand | OKI |
| Dimensions (W x D x H) | 387 x 364 x 245 mm |
| Weight | Approx. 11 kg |
| Power Consumption (Active) | Approx. 550 W |
| Power Consumption (Standby) | Approx. 80 W |
| Power Consumption (Sleep) | Approx. 8 W |
| Print Speed (A4) | Up to 28 ppm |
| Duplex Printing | Automatic |
| Network Connectivity | Ethernet 10/100 Base-TX |
| USB Connectivity | USB 2.0 High Speed |
| Paper Input Capacity | 250 sheets (standard tray) |
| Paper Output Capacity | 150 sheets (face down) |
| Recommended Monthly Volume | 1,500 - 5,000 pages |
| Toner Cartridge Yield (Standard) | Approx. 2,000 pages (starter included) |
| Drum Unit Yield | Approx. 20,000 pages |
| Maintenance Kit | Replacement recommended every 100,000 pages |
| Safety Certifications | CE, UL, FCC Class B |
| Repairability | User-replaceable toner, drum, and fuser unit |
| Warranty | 1 year (limited) |
Frequently Asked Questions - B420dn OKI
How do I load paper into the B420dn?
Open the paper tray, adjust the paper guides to the paper size, and load a stack of paper (up to 250 sheets) with the print side facing up. Close the tray securely.
How do I replace the toner cartridge?
Open the top cover, remove the old toner cartridge, unpack the new one, shake it gently to distribute toner, then insert it until it clicks. Close the cover. The printer will reset automatically.
Why is the printer not printing from the network?
Check that the Ethernet cable is securely connected and that the printer's IP address is configured correctly. You can print a network configuration page by pressing the 'Information' button on the control panel.
How do I clear a paper jam?
Open the top cover and remove the drum unit. Carefully pull out any jammed paper. Also check the paper tray and the rear output area. Refer to the user manual for detailed illustrations.
What type of paper can I use?
The OKI B420dn supports plain paper, letterhead, recycled paper, envelopes, and labels. Recommended weight is 60 to 105 g/m² for the main tray and up to 199 g/m² for the manual feed slot.
How do I enable duplex printing?
In your printer driver settings, select 'Print on Both Sides' or 'Duplex'. The printer automatically flips the paper for second-side printing. Ensure you have selected the correct paper orientation.
The printer shows 'Replace Drum' message. What should I do?
Purchase a new drum unit (OKI part number 41829101 or equivalent). Open the top cover, remove the old drum, insert the new drum, and close the cover. Reset the drum counter by following the instructions in the manual.
Can I print from a mobile device?
Yes, if your printer is connected to the network. Use OKI's PrintSuperVision web interface or third-party apps like OKI Mobile Print (available for Android and iOS).
How do I clean the printer?
Turn off and unplug the printer. Use a soft, lint-free cloth slightly dampened with water to wipe the exterior. For the interior, use a dry cloth. Avoid touching the drum surface. Refer to the cleaning section in the manual.
Where can I find the latest drivers?
Visit the OKI support website at www.oki.com/printing/downloads. Enter 'B420dn' to find drivers for Windows, macOS, and Linux. You can also use the automatic driver update feature in your operating system.
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