Intermec PA30 User Manual page 32

Chapter 1 — Learning About the PA30
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2 Turn the printhead lift lever counterclockwise to open the
printhead.
3 If you are reloading ribbon, remove the empty ribbon core or
unused ribbon.
4 Squeeze the ends of the ribbon supply bobbin and slide the
bobbin along the shaft. The bobbin snaps into several grooves
along the shaft that correspond to these ribbon widths:
PA30 Print Engine User's Manual