PrintersThermal Printer
Epson C31CD52566 Printer Manual
Setup, everyday use, maintenance and troubleshooting for the direct thermal printer, with verified specifications.
- TypeThermal Printer
- Sleep power0.7 W
- Off-mode power0 W
About the Epson C31CD52566
This guide covers the Epson C31CD52566, a direct thermal printer listed as ENERGY STAR certified. The manufacturer markets it as the TM-20II-m.
It uses a direct thermal print mechanism in a compact, small-format design of the kind used for receipts, shipping labels, tickets and barcodes.
It draws 0.7 W in sleep and 0 W when switched off (standby). That sleep power is lower than 77% of the 499 Thermal Printer models in our database.
Specifications
| Brand | Epson |
|---|---|
| Model number | C31CD52566 |
| Model name / series | TM-20II-m |
| Product type | Thermal Printer |
| ENERGY STAR product category | Printers |
| Marking technology | Direct thermal |
| Media size format | Small |
| Color capable | No |
| Automatic duplex (two-sided) | No |
| Professional imaging product | No |
| Sleep-mode power | 0.70 W |
| Standby (off) power | 0.00 W |
Safety information
- Plug the printer directly into a grounded wall outlet. Avoid light-duty extension cords, and replace a damaged power cord before use.
- Keep the ventilation openings clear and leave the clearance around the unit that the manual specifies for paper trays, covers and service access.
- Switch off and unplug the unit before cleaning it or reaching deep inside to clear a jam.
- The printhead can become hot during long runs. Let it cool before cleaning it, and keep fingers away from the tear bar or automatic cutter, which can be sharp.
Setup
- Unpack and remove shipping materials
Remove all tape, foam and protective film, including pieces inside the covers and paper trays.
- Choose a location
Place the unit on a stable, level surface away from direct sunlight, heat sources, grease and moisture, with room to open the cover for media changes.
- Load media
Load direct thermal paper or labels with the heat-sensitive side facing the printhead. Direct thermal printers use no ink or ribbon; the image is formed by heating the coated media.
- Connect to your computer or network
Connect the unit to your network (Ethernet or Wi-Fi where available) or directly by USB, following the setup guide. Network connection lets several users share it and makes firmware updates easier.
- Install drivers and software
Install the manufacturer's driver or label-design software, or configure your point-of-sale or shipping application to use the printer.
- Calibrate the media sensor
Run the media calibration from the control panel or utility after loading a new media type so the printer finds the gap, notch or black mark between labels.
- Check the sleep timer
Confirm that sleep and auto-off timers are enabled in the control panel or web interface to minimize idle energy use.
Using your printer
Media and print quality
- Direct thermal labels and receipts can fade or darken with heat, sunlight and some plastics; use thermal transfer labels where long-term durability is required.
- Adjust print darkness (heat) and speed together: raise darkness or lower speed for faint prints, and lower darkness if barcodes look bloated.
- Use media approved for your printer; abrasive or poorly coated media wears the printhead faster.
Sleep and power settings
In sleep the unit draws 0.7 W, and 0 W when switched off at the power button. Use the auto-off or weekly timer (if offered) to switch the unit off overnight and on weekends.
Care and maintenance
| When | What to do |
|---|---|
| Each media or ribbon change | Clean the printhead with a cleaning pen or swab and isopropyl alcohol, and let it dry before printing. |
| Monthly | Clean the platen roller and media sensors; remove label adhesive and paper dust from the media path. |
| As needed | Replace the printhead and platen roller when print quality cannot be restored by cleaning. |
| Every 6 months | Install firmware updates from the manufacturer and vacuum dust from the exterior vents. |
Troubleshooting
Most printer problems come from media, consumables, connections or settings. Try these steps first; for numbered error codes, look up the code in the manufacturer's manual or support site.
| Problem | Possible cause | What to try |
|---|---|---|
| Shows offline or jobs stay in the queue | Network or IP address changed; wrong driver or port; printer asleep and not waking. | Restart the printer and computer, print a network configuration page, re-add the printer using its current address, and reserve that address in your router. |
| Labels or receipts come out blank | Media loaded upside down; non-thermal media used. | Load the roll with the heat-sensitive side facing the printhead (scratch it with a fingernail — the coated side darkens). |
| Faint or broken print, unreadable barcodes | Dirty printhead; darkness too low or speed too high; worn printhead. | Clean the printhead, increase darkness or lower speed, and replace the printhead if a white line runs through every label. |
| Labels skip or print across gaps | Media sensor not calibrated; sensor dirty; wrong media type set. | Run media calibration, clean the sensor, and set gap, notch or black-mark media correctly. |
| Paper or media jams | Wrong media for the tray; overfilled tray; worn rollers; debris in the path. | Remove jammed media in the direction of the paper path, check for torn pieces, reload within the fill line, and clean the rollers. |
| Slow to start the first job | Unit waking from sleep. | This is normal. Group jobs together; avoid disabling sleep, which raises energy use considerably. |
Energy use and running costs
ENERGY STAR rates this device on its low-power modes: 0.7 W in sleep and 0 W when switched off. If it stays plugged in and asleep around the clock, sleep mode alone uses about 6.13 kWh per year — roughly $1.04 at $0.17 per kWh.
Switching it off outside a 10-hour, 5-day work week (and letting it sleep during working hours) cuts that to about 1.82 kWh per year ($0.31).
Energy used while actively printing is not included in these figures; it depends on how many pages you produce.
Frequently asked questions
What type of device is the Epson C31CD52566?
It is a direct thermal printer in ENERGY STAR's small media-size category. It is sold as the TM-20II-m.
How much power does the Epson C31CD52566 use in sleep?
It draws 0.7 W in sleep and 0 W when switched off. Left asleep all year, that is about 6.13 kWh, or $1.04.
Does the Epson C31CD52566 need ink or a ribbon?
No. As a direct thermal printer it forms the image by heating coated thermal paper or labels, so the only consumable is the media itself.
Is the Epson C31CD52566 ENERGY STAR certified?
Yes. It appears on the ENERGY STAR certified imaging equipment list, with a certification date of June 2014.
Sources and disclaimer
Specifications on this page come from the ENERGY STAR certified printers dataset published by the U.S. Environmental Protection Agency (record certified June 8, 2014), retrieved October 7, 2026.
The setup, operating, maintenance and troubleshooting guidance is written by ManualHarbor's editors for this specific product type and configuration. It is an independent guide — not a reproduction of the manufacturer's manual — and ManualHarbor is not affiliated with Epson. Always follow the safety instructions, installation requirements and warranty terms supplied with your unit, and contact Epson or an authorized service provider for warranty repairs and replacement parts.
Running-cost figures use assumed U.S. average utility prices and are estimates for comparison only. See our editorial methodology for details.
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