Why does the red light keep flashing when we print?
The red light is an indication that our Soonmark printer has a problem with your label.
Most likely, it needs to re-learn your label.
Please ensure the labels are loaded correctly in the printer and then run paper calibration
following the steps below.
Paper calibration
① Press and hold the paper FEED button on the printer.
② While pressing and holding the paper FEED button, turn on the power switch.
③ When the indicator light flashes red twice, release the button immediately,
and the paper calibration is completed.
* You need to do the calibration again every time when you change a new paper size or paper type, or the red light flashes during printing.
Click and see the video of HOW-TO.