How to change the print head on the DM400, DM500, and more

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Products affected: DM400™, DM500™, DM550™, DM800™, DM800i™, DM900™, DM1000™, and DM1100™
IMPORTANT!  Ensure a replacement print head is available before beginning this procedure.  This procedure cannot be cancelled once it has begun.
  1. Press the Menu button
  2. Select Maintenance
  3. Select Replace Print head
  4. Lift the main cover
  5. Slide print head latch to the left and pull forward as seen in (1) in picture
    • IMPORTANT!  Ensure a replacement print head is available before beginning this procedure.  This procedure cannot be cancelled once it is begun.
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  1. Hold the latch in place and pull front panel forward as seen in (2) in the picture above
  2. Lift print head cover toward the rear
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  1. Holding print head handle, lift print head straight up so that back of the print head does not rub against the pins (connectors) in the rear of the casing
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  1. Remove new print head from the package
  2. Remove protective cover from the new print head
  3. Insert new print head into the holder
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  1. Close the print head cover
  2. Push front panel back until it clicks into place.  Do this two times to ensure a good connection for the ink to flow properly
  3. Close the main cover of the machine
  4. Press Tape or Start to print a test on an envelope
    • Select Yes if the quality is acceptable
    • Select No if the quality is poor
  5. Press the Left directional arrow to return to the home screen

UPDATED: June 24, 2020