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HP Color LaserJet Enterprise MFP M577, M578 - Replace the toner-collection unit

The following information provides details about the toner-collection unit for the printer, and it includes instructions to replace it.
The printer indicates when the toner-collection unit is nearly full and when it is completely full. When it is completely full, printing stops until the toner-collection unit is replaced. To purchase a toner-collection unit (part number B5L37A), go to the HP Parts Store at www.hp.com/buy/parts.
note:
The toner-collection unit is designed for a single use. Do not attempt to empty the toner-collection unit and reuse it. Doing so could lead to toner being spilled inside the printer, which could result in reduced print quality. After use, return the toner-collection unit to HP’s Planet Partners program for recycling.
  caution:
If toner gets on clothing, wipe it off by using a dry cloth and wash the clothes in cold water. Hot water sets toner into fabric.
In addition to the instructions provided in this document, you can view the following video of how to remove and replace the toner-collection unit:
note:
The printer models referenced in this video might be different from your printer model, but the steps to remove and replace the toner-collection unit are the same.
Removing and Replacing the Toner Collection Unit HP Color LaserJet Enterprise M553 Printer
Removing and Replacing the Toner Collection Unit HP Color LaserJet Enterprise M553 Printer
No audio. Learn how to remove and replace the toner collection unit for HP Color LaserJet Enterprise M553 Printer.
  1. Open the front door.
    Figure : Open the front door
  2. Open the toner-collection-unit door on the upperleft side of the printer.
    Figure : Open the toner-collection-unit door
  3. Pull out the toner-collection unit and the attached door.
    Figure : Remove the toner-collection unit
  4. Remove the new toner-collection unit from its packaging.
    Figure : Unpack the toner-collection unit
  5. Install the new toner-collection unit and the attached door into the printer. Align the tabs on the door with the slots in the printer.
    Figure : Install the toner-collection unit
  6. Close the toner-collection unit door.
  7. Close the front door.
    To recycle the used toner-collection unit, follow the instructions included with the new toner-collection unit.
    Figure : Close the front door