What are the common failures of ribbons?

Ribbon break
The tensile force of the ribbon is too large, the suture thread is broken or the ribbon is broken by a hammer. In the former case, you can cut off the broken part and re-stitch it; in the latter case, just replace the ribbon.

Ribbon is stuck
The edge of the ribbon is easily entangled with the ribbon wheel after it is stranded or fluffed, causing the ribbon wheel to be jammed, and the ribbon cannot be retracted into the ribbon cassette normally.

Solution
First open the printer cover, open the ribbon arm and hammer row interlocking handle, gently pull the ribbon back at the ribbon feeding end of the ribbon cassette, then close the ribbon arm and hammer row interlocking handle, and turn on the power. After the machine self-checks, the ribbon will be loaded back into the ribbon.

Precautions
Do not store in direct sunlight and dusty places.