Brother WL660 - Manual (Page 65)

CHAPTER 6 TROUBLESHOOTING
6–11
English
The whole page is printed
in black. Wipe the contact plates with cleaning alcohol.
See “Cleaning the Printer Interior and Drum
Unit” in Chapter 5. Never use heat-sensitive
paper as it will cause this problem.
If the same problem occurs after cleaning,
replace the drum unit with a new one.
Fig. 6-10 Black Page
Toner scatters and stains
the printed page. If toner scatters over the whole printing surface,
adjust the print density dial inside the printer
clockwise. See “ADJUSTING THE PRINT
DENSITY” in Chapter 5.
Clean the printer interior. See “Cleaning the
Printer Interior and Drum Unit” in Chapter 5.
Make sure that you use paper that meets
specifications.
If you still have the same problem, replace the
drum unit with a new one.
Fig. 6-11 Scattering Toner