Please check the following.

1. Is there dust or dirt on the print head or ink ribbon guide rollers, preventing the rollers from turning freely?

   Clean the print head or ink ribbon guide rollers. For details, see "Print head maintenance" or "Ink ribbon guide roller maintenance" in "What maintenance should be performed?".
    

2. Is the inside of the rims for the paper core holder dirty, causing the tape or fabric ribbon to be incorrectly wound?

   Clean the paper core holder. For details, see "Paper core holder maintenance" in "What maintenance should be performed?".
    

3. Remove the tape cassette or fabric ribbon, and then reinstall it.

   Make sure there is no slack in the tape cassette or fabric ribbon cassette and ink ribbon cassette.
   For details, see "Replacing the tape cassette".
    

4. Make sure that the covers are firmly closed.
     

5. Is the paper core holder correctly installed in the machine?

   Pull the lock of the paper core holder toward you to secure it firmly in the machine.
   Securely attach the tape or fabric ribbon to the paper core. If the tape or fabric ribbon is not securely affixed or is affixed at an angle, the tape or fabric ribbon will not be correctly wound.
   For details, see "Replacing the paper core holder".