Oki PT390 Manuel D'utilisation page 27

Paper not protruding
from the front cover
Note : Before loading a new roll, make sure that an old core does not remain in the
roll holder. Leaving an old core will cause a paper-near-end error condition.
Note : The roll paper must have no deformities. Using roll paper such as that
shown in the figure below may cause a paper jam, uneven printing, or
other printing problem.
Note : If the loaded roll paper is loose (slack) as shown below, take up the slack
before printing on the paper. Printing on roll paper that is loose may cause
a paper jam, uneven printing, or other printing problem, which will
prevent the printer from detecting paper near end conditions.
Roll paper inserted
upside down
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