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HP Designjet 4020 and 4520 Printer Series - Remove a printhead

  warning:
Make sure the printer wheels are locked (the brake lever is pressed down) to prevent the printer from moving.
Printhead replacement must be performed with the printer switched on at the power isolation switch.
  1. At the printer's front panel, select the icon, then Printhead management > Replace printheads.
    Figure : Replace printheads
  2. The printer moves the carriage into the correct position.
      caution:
    If the carriage is left in the central part of the printer for more than seven minutes. it will try to move back to its normal position in the right-hand end.
  3. When the carriage has stopped moving, the front panel will ask you to open the window.
    Figure : Opening the window
  4. Locate the carriage.
    Figure : Locating the carriage
  5. Pull up and release the latch on top of the carriage.
    Figure : Releasing the latch on the carriage
  6. Lift up the cover. This will now give you access to the printheads.
    Figure : Lifting the printhead cover
  7. To remove a printhead, lift up the blue handle.
    Figure : Lifting the printhead handle
  8. Using the blue handle, gently disengage the printhead.
    Figure : Gripping the printhead handle
  9. Gently pull the blue handle upward until the printhead is released from the carriage.
      caution:
    Do not pull abruptly because this can damage the printhead.
    Figure : Lifting the printhead
  10. The front panel display identifies the missing printhead.
    Figure : Printhead error: replace

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