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HP LaserJet Enterprise MFP M631, M632, M633 - Removal and replacement: White backing and retention clips
This document provides the procedures to remove and replace the white backing and retention clips.
Mean time to repair: 5 minutes
Service level: Basic
  note:
When applicable, special installation instructions are provided for an assembly at the end of the removal procedure. Always completely read the removal instructions and follow all special installation instructions.
Before performing service
  • Disconnect the power cable.
      warning:
    To avoid damage to the printer, turn the printer off, wait 30 seconds, and then remove the power cable before attempting to service the printer.
Use the table below to identify the correct part number for your printer. To order the part, go to www.hp.com/buy/parts
White backing and retention clips part numbers
5851-7206
5851-7207
White backing and retention clips A4 kit
White backing retention clips (only) kit
Required tools
  • No special tools are needed to remove or install this assembly.
After performing service
Turn the printer power on
  • Connect the power cable.
  • Use the power switch to turn the power on.
Post service test
Print a page and make sure that the toner is fused to the page properly.
  1. Remove the white backing and retention clips.
    1. Open the document feeder.
      Figure : Open the document feeder
    2. Grasp the edge of the white backing, and then firmly pull it away from the document feeder to remove the white backing and the retention clips.
        note:
      The clips are still attached to the white backing when it is removed.
      Figure : Remove the white backing
  2. Unpack the replacement assembly.
    1. Dispose of the defective part.
        note:
      HP recommends responsible disposal of the defective part.
    2. Unpack the replacement part from the packaging.
        caution:
      Some parts are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, touch the sheet-metal chassis to provide a static ground before touching an ESD-sensitive assembly. Protect the ESD-sensitive assemblies by placing them in ESD pouches when they are out of the printer.
      If the replacement part is a roller or pad, avoid touching the spongy part of it. Skin oils on the roller or pad can cause paper pickup and/or print-quality problems. HP recommends using disposable gloves when handling rollers or pads or washing your hands before touching rollers or pads.
        note:
      Make sure that all of the shipping materials (for example shipping tape) are removed from the replacement part prior to installation.
    3. To install an assembly, reverse the removal steps.
        note:
      When applicable, special installation instructions are provided for an assembly at the end of the removal procedure. Always completely read the removal instructions and follow all special installation instructions.
  3. Install the white backing and retention clips.
    1. Verify that the springs are positioned correctly on each of the retention clips provided in the replacement kit.
      Figure : Verify spring positions
    2. In the location where the white backing was removed, install seven retention clips in the document feeder. Align the tabs on the clip with the slots in the document feeder.
      Figure : Install seven retention clips
    3. Press on each retention clip to make sure that they are fully installed. You will hear an audible click when the clip is correctly installed.
      Figure : Press on each clip
    4. Peel an adhesive square off of the backing sheet.
      Figure : Remove an adhesive square
    5. Attach an adhesive square to each retention clip on the document feeder.
        note:
      Do not remove the protective film off of the top of the adhesive square yet.
      Figure : Attach the adhesive squares on each retention clip
    6. Remove the protective film off of each adhesive square.
      Figure : Remove the protective film
    7. Position the white backing on the image scanner glass. Make sure that the corner with the embossed arrow on the backing is positioned against the corner with the white arrow on the scanner.
      Figure : Position the white backing
    8. Close the document feeder.
      Figure : Close the document feeder
    9. Open the document feeder.
      Figure : Open the document feeder
    10. Press on the white backing at the location of each retention clip to ensure that the backing is securely attached to the adhesive on the clips.
      Figure : Press on the white backing
    11. Close the document feeder.
      Figure : Close the document feeder

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