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HP Color LaserJet Enterprise M552, M553 - Removal and replacement: Toner collection unit (TCU)

Introduction
This document provides the procedures to remove and replace the toner collection unit (TCU).
Before performing service
  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.
Use the table below to identify the correct part number for your printer. To order the part, go to www.hp.com/buy/parts.
Toner collect unit (TCU) kit part number
B5L37-67901
Toner collection unit (TCU) with instruction guide
Required tools
No special tools are required to install this part.
After performing service
Make sure that the TCU is fully closed after replacing it.
Step 1: Remove the TCU
  1. Open the front door.
    Figure : Open the front door
  2. Open the TCU.
      note:
    The toner collection hatch cover automatically closes when the TCU is opened.
    Figure : Open the TCU
  3. Pull the TCU away from the printer at an angle to remove it.
      caution:
    Do not open the toner collection hatch cover when handling the TCU. 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.
    Figure : Remove the TCU
Step 2: Unpack the replacement TCU
Unpack the replacement assembly from the packaging.
  note:
HP recommends responsible disposal of the defective assembly.
Figure : Recycle and unpack illustration
Step 3: Install the TCU
  1. Verify that the toner collection hatch cover is in the closed position on the TCU.
    Figure : Verify that the toner collection hatch cover is closed
  2. Position the TCU with the hinges in the slots provided in the printer (callout 1), and then rotate the TCU up and into the closed position.
      note:
    The toner collection hatch cover automatically opens when the TCU is closed.
    Figure : Install the TCU
  3. Close the front door.
    Figure : Close the front door

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