White Vertical Streaks On One Color Image; White Horizontal Stripes On One Color Image - Brother DCP-9045CDN Service Manual

White vertical streaks on one color image

User Check
- Clean the scanner windows of the appropriate color with a soft lint-free cloth.
- Check if there is no dust in the gap between the toner cartridge and drum frame.
- Replace the toner cartridge with a new one.
- Check the machine's environment. High temperature and high humidity conditions can cause
this problem.
- Damp (wet) paper might be used. Try changeing to fresh unopened paper.
Step Cause
1 Condensation
2 Transfer failure
3 Scanner windows
failure

White horizontal stripes on one color image

User Check
- Check that the appropriate media type is selected in the printer driver.
- The problem may disappear by itself. Try printing multiple pages to clear this problem
especially if the machine has not been used for a long time.
- The drum unit may be damaged. Replace the drum unit with a new one.
Step Cause
1 Toner cartridge
electrode
connection failure
Check
Has condensation
occurred inside the
machine?
Is the transfer roller of the
appropriate color
scratched?
Is the problem solved
after replacing the laser
unit?
Check
Are the electrodes on the
toner cartridge and
machine body dirty?
1-52
Remedy
Result
Yes Try to print several pages
or leave the machine 2
hours to allow it to reach
room temperature.
Yes Replace the drum unit.
Yes Replace the laser unit.
Remedy
Result
Yes Clean both electrodes
Confidential