Image problems may appear at regular intervals that depend on the circumference of certain components. The following diagram shows the possible symptoms (black or white dots at regular intervals).

  1. Paper feed direction
  2. Problems at regular intervals

Problems

Intervals

Defective parts

Problems with the printed result

(other than black or white dots)

29.8 mm

Charge roller

37.7 mm

Registration roller

45.8 mm

Transfer roller

94.2 mm

Fusing unit (Pressure roller)

93.1 mm

Fusing unit (Hot roller)

100.5 mm

Paper feed roller

Black or white dots

27.0 mm

AIO (Development roller)

75.3 mm

AIO (OPC drum)