Brother DCP-9045CDN, Service Manual

Page: 71 / 491

Confidential 1-52
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 Check
Result
Remedy
1 Condensation Has condensation
occurred inside the
machine?
Yes Try to print several pages
or leave the machine 2
hours to allow it to reach
room temperature.
2 Transfer failure Is the transfer roller of the
appropriate color
scratched? Yes Replace the drum unit.
3 Scanner windows
failure
Is the problem solved
after replacing the laser
unit? Yes Replace the laser unit.
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 Check
Result
Remedy
1 Toner cartridge
electrode
connection failure
Are the electrodes on the
toner cartridge and
machine body dirty? Yes Clean both electrodes