zenpert 4T520P Series User Manual page 13

4. Push the print head release button to open the print head mechanism.
OPEN
5. Open the ribbon cover.
6. Insert the ribbon rewind spindle (with
paper roll) and ribbon supply spindle
((with ribbon) to ribbon rewind hub
and rewind spindle hub.
Note:
Insert right side of spindle (marked
"R") to hub first. Then, insert the
left side (marked "L") to the hole at
the ribbon mechanism.
9