Brother 2150N, 2170W, HL-2140 4.IMAGE DEFECT TROUBLESHOOTING, 4.2Diameter of Rollers, 4.1Image Defect Examples

4.IMAGE DEFECT TROUBLESHOOTING

4.1Image Defect Examples

Light Faulty registration Dark Poor fixing Completely blank

Image distortion All black Dirt on the back of paper Vertical streaks

Black vertical streaks	Black horizontal	White vertical	White horizontal	Faint print
in a light background	stripes	streaks	streaks

White spots	Black spots	Black band	Downward fogging	Horizontal lines
			of solid color

GhostFogging

Fig. 1-5

4.2Diameter of Rollers

Image defects which appear periodically may be caused by failure of a roller. Specify the cause referring to the diameter of the rollers or pitch which appears in the image as shown in the table below.

No.	Parts name	Diameter	The pitch which
			appears in the image
1	Develop roller	Ø20.0 mm	41.0 mm
2	Exposure drum	Ø24.0 mm	75.0 mm
3	Heat roller in the fuser unit	Ø25.0 mm	78.5 mm
4	Pressure roller ASSY in the fuser unit	Ø25.0 mm	78.5 mm

1-21 Confidential