Datamax-O’Neil Mark III: How to Replace the Printhead

by ScanSource Technical Services on August 1, 2011

in Barcode Printing,ScanSource POS & Barcode,Technical Knowledge Portal,Technology

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If the Printhead becomes damaged or worn, replace it as follows:

  1. Turn OFF the printer and remove the ribbon if installed.
  2. Lower the Ribbon Handler Assembly.
  3. Press outward on the two Printhead Carrier Tabs and rotate the Printhead Carrier down.

  1. Press inward on the two Printhead Shield Tabs and rotate the Printhead Shield down.

  1. Loosen the Printhead Screw and allow the Printhead to fall free.
  2. Remove the Printhead Cable.


  1. Carefully connect the Printhead Cable to the new Printhead.
  2. Position the Printhead in the Printhead Carrier and tighten the Printhead Screw.
  3. Ensure the Sensor properly seated and rotate the Printhead Shield upward until it snaps into place.
  4. Rotate the Printhead Carrier upward until it snaps into place.

Instructions also available for download.


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