Printronix T5204R Administrator's Manual page 41

Loading Ribbon
Ribbon
Printhead
Media
Rear Ribbon Guide Roller
183395 REV
4. Thread the end of the ribbon under the rear ribbon guide roller, then
between the platen and the printhead.
You can also refer to the arrows on the printer frame or to the upper-right
corner of the label inside the media cover for ribbon loading instructions.
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