ML5721eco - Printer OKI - Free user manual and instructions
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| Product Type | Monochrome LED Printer |
| Brand | OKI |
| Model | ML5721eco |
| Print Technology | Single-pass LED |
| Print Speed | Up to 28 ppm (A4) |
| Print Resolution | 1200 x 1200 dpi |
| Paper Input Capacity | 250 sheets (standard tray) |
| Connectivity | USB 2.0, Ethernet (10/100 Base-TX) |
| Dimensions (WxDxH) | 410 x 390 x 250 mm |
| Weight | 12.0 kg |
| Power Consumption (max) | 550 W |
| Power Consumption (standby) | 30 W |
| Functions | Print only |
| Recommended Monthly Duty Cycle | 5,000 pages |
| Maintenance & Cleaning | Clean exterior with dry cloth; use cleaning sheet for internal roller |
| Safety Certifications | CE, RoHS |
| Consumables | Toner cartridge (MLT-ECO), Drum unit (MLT-DRUM) |
| Repairability | Replacement of toner, drum, and fuser unit possible; other components service by technician |
| Eco Features | Automatic duplex printing, low power consumption, eco mode |
Frequently Asked Questions - ML5721eco OKI
How do I load paper into the ML5721eco?
Open the paper tray by pulling it out. Adjust the paper guides to match the paper size. Fan the paper stack and place it in the tray. Ensure the stack is below the paper limit mark. Then slide the tray back in until it clicks.
How do I replace the toner cartridge?
Open the front cover. Remove the old toner cartridge by pulling it out. Unpack the new MLT-ECO toner cartridge and shake it gently to distribute toner. Insert it firmly until it clicks. Close the cover. The printer will automatically reset.
How do I clean the printer?
Turn off the printer and unplug it. Use a soft dry cloth to wipe the exterior. For the interior, you can use a cleaning sheet if available. Avoid touching the LED head and drum unit. Do not use liquid cleaners.
How do I connect the printer to my computer?
Use a USB 2.0 cable or connect via Ethernet to your network. Install the printer driver from the OKI support website. Follow the on-screen instructions. For network, assign an IP address via the printer menu.
What should I do when a paper jam occurs?
Open the front cover and top cover to access the jam area. Gently pull out any jammed paper from the input tray or fuser area. Do not tear the paper. Check the duplex path if used. Close all covers and press the OK button to resume.
What type of paper can I use?
The printer supports plain paper, recycled paper, labels, envelopes, and cardstock. Recommended weight: 60 to 105 g/m² for plain paper. Use only paper designed for laser printers. Avoid damp or curled paper.
How do I enable eco mode?
Press the Menu button on the control panel. Navigate to Printer Settings > Eco Mode. Select On. This reduces power consumption and toner usage by enabling duplex printing and adjusting print density.
Can I print from a mobile device?
Yes, if the printer is connected to the network. Download the OKI Mobile Print app. Ensure your mobile device is on the same network. The app supports iOS and Android. You can print documents and photos directly.
How do I replace the drum unit?
Open the front cover. Remove the toner cartridge first. Then pull out the drum unit (MLT-DRUM) by its handles. Insert the new drum unit until it clicks. Reinstall the toner cartridge. Close the cover. The printer will initialize.
How do I reset the printer to factory defaults?
Press the Menu button. Navigate to Maintenance > Factory Reset. Confirm by pressing OK. The printer will restart with default settings. All network and custom settings will be lost.
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