Black Horizontal Stripes - Brother HL-2230 Service Manual

4.2.11 Black horizontal stripes

Step
Dirt on the electrodes of the drum
1
unit and the printer body
Bend of tray ground spring
2
Toner attached on the develop
3 roller (horizontal stripes at 32.5
mm)
Scratch and Dirt on the heat roller
4
(horizontal stripes at 53.4 mm)
High voltage power supply PCB
5
ASSY failure
6 Main PCB failure
CAUTION :
• 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.
1 Develop roller
2 Exposure drum
3 Heat roller in the fuser unit
4 Pressure roller in the fuser unit
User Check
• Clean the inside of the printer and the corona wire in the drum unit.
• When the horizontal stripes at 94.2 mm are intervals, replace the
drum unit with a new one.
• The paper tray ground terminal provided in the printer body may be
dirty. Clean the contact with a dry cloth.
Cause
Bottom surface of Paper tray
Paper tray ground terminal
Fig. 2-10
Parts name
2-35
Remedy
Clean the electrodes of the drum unit and
printer body. (Refer to Fig. 2-8, Fig.
(1) Correct bending of the tray ground spring.
(2) Replace the paper tray.
This problem will disappear by printing
approximate 10 pages. If the same problem
occurs, replace the toner cartridge.
Replace the fuser unit.
Replace the high voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Diameter
appears in the image
16 mm
Ø
30 mm
Ø
17 mm
Ø
25 mm
Ø
2-9.)
The pitch which
32.5 mm
94.2 mm
53.4 mm
78.5 mm
Confidential