Datamax DMX E E-4204 Operator's Manual page 26

6. Place the Ribbon Hubs back into the printer and route the ribbon
through the Printhead Carrier Assembly, as shown below.
Note: Ensure the inked side of the ribbon faces the media and NOT the
printhead.
7. The 'Media Type' setting within the printer's setup must be set to
'Thermal Transfer' to print using a ribbon. See Section 4.4.
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