: Always use high-quality thermal paper recommended by Qmatic to prevent jams and head wear.

The cutting blade is stuck mid-stroke. Turn off power, manually turn the cutter gear to retract the blade, remove jammed paper fragments, and reboot. Problem 4: Communication Error / Offline Status

You will see an error on the screen: or "Paper Out." The official manual lists the code but doesn't explain why the sensor isn't detecting the paper. A better manual tells you to clean the black optical sensor with a dry q-tip.

: Closes the current transaction or service point.

Non-standard thermal paper leaves residue that damages the print head.