Cause

This refers to granular spots that can occur in large areas of color or half-tone coverage in images, and resemble tendrils like a display of fireworks. If these appear in half-tones, or in blank areas of images, this could mean accumulated toner is causing uneven spots.

Solution

The stay below the development unit is dirty. Inspect and clean [A] below the PCDU.

  1. Disconnect the front edge cover at [A], [B], and [C].
  2. Remove the front edge cover.
  3. Lower the ITB lever to lower the ITB.

  4. Depress tab [A] and then remove the CGB unit [B].

    To avoid damage to the CGB sensor and harness connector, the CGB unit must always be removed before the PCDU is removed.

  5. Lay the CGB unit on a flat clean surface with the grid facing up.

    Never lay the CGB unit with the grid side down.

  6. Detach the PCDU cover (x3).

    When you reattach the cover, be sure to attach the screws in this order: Center, Right, Lower Left


  7. Turn the knob on the end of the drum shaft counter-clockwise, and then remove it.
  8. Grip the small handle as shown, and then pull out the PCDU until it stops.
  9. Use a clean cloth, blower brush, or vacuum cleaner to clean the stay below the PCDU.