TSC PRINTRONIX TX210 Series User Manual page 17

Note: The yellow part of spindle is in left side.
4.
Install the paper core right side onto the rewind hub
first then align the notches on the left side and
mount onto the spokes.
5.
Insert the ribbon spindle into the ribbon core.
6.
Install the ribbon right side onto the supply hub first
then align the notches on the left side and mount
onto the spokes.
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