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HP Color LaserJet Enterprise M856 - Replace the toner-collection unit

Replace the toner-collection unit if you receive a message on the printer, or if you have print quality problems.

Toner-collection unit information

Replace the toner-collection unit when the control panel prompts you.
Toner-collection unit information
Item
Description
Cartridge number
Part number
HP Toner Collection Unit
Replacement toner-collection unit
Not applicable
3WT90A
  caution:
When the toner-collection unit reaches the end of its life, the printer will stop printing to avoid damage to internal parts. You must replace the toner-collection unit to continue printing.
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.

Remove and replace the toner-collection unit

Follow these steps to replace the toner-collection unit.
How to Remove the Toner Collection Unit (TCU) for the HP Color LaserJet Enterprise M751, M856, MFP M776, and Managed E75245, E85055 Printers
How to Remove the Toner Collection Unit (TCU) for the HP Color LaserJet Enterprise M751, M856, MFP M776, and Managed E75245, E85055 Printers
No audio. Learn how to remove and replace the toner collection unit (tcu) for the HP Color LaserJet Enterprise M751, M856, MFP M776, and Managed E75245, E85055 Printers.
  1. Open the front door.
    Figure : Open the front door
  2. Open the left door.
    Figure : Open the left door
  3. Grasp the front of the toner-collection unit and remove it from the printer.
    Figure : Remove the toner-collection unit
  4. Remove the new toner-collection unit from its packaging.
    Figure : New toner-collection unit
  5. Install the new unit into the printer. Make sure the toner-collection unit is firmly in place.
    Figure : Install the toner-collection unit
  6. Close the left door.
    Figure : Close the left door
    note:
    If the toner-collection unit is not installed correctly, the left door does not close completely.
  7. Close the front door.
    Figure : Close the front door
    Save all packaging for recycling the used toner-collection unit. To recycle the used toner-collection unit, follow the instructions included with the new toner-collection unit.