1. Remove the drum cleaning unit (Drum Cleaning Unit)
  2. With the drum cleaning unit pulled out, twist the knob counter-clockwise to unlock the drum.
  3. Rotate the lock handle toward you to release the drum.
  4. Pull the drum toward you at a slight angle to remove it.
  5. Lay the drum on a flat clean surface.
  6. Cover the drum with a piece of paper to protect it from the light.

Re-installation

Be sure to use the new drum knob fastening tool when you re-install the drum.

  • If the knob is not fastened completely, this can cause the developer/toner mixture to collect on the magnetic roller and scratch the drum.
  • When you install the drum and fasten the drum knob with this tool, the drum cleaning unit should not be installed on the PCDU.
  • If the drum knob is loosened with the drum cleaning unit installed, be sure to remove the drum cleaning unit, and then fasten the knob.
  • Fastening the drum knob with the drum cleaning unit installed will cause the drum cleaning unit to apply pressure to the drum and narrow the gap at the front side.

  1. Press gently to insert the tabs into the knob.
  2. Twist the drum knob clockwise until the tool runs idle.
  3. Check the drum knob position. The groove [A] should be slightly to the right of the vertical reference line [B] in the photo.