Brother HL-630 User Manual page 70

USER'S GUIDE
Printed pages have white
spots in black text and
graphics area.
Toner scatters and stains
the printed page.
6–14
Make sure that you use paper that meets the
specifications. Rough surface or thick media
can cause the problem.
If you still have same problem, replace the
drum unit with a new one.
Fig. 6-9 White Spots
If toner scatters over the whole printing surface,
adjust the print density dial inside the printer
anticlockwise. 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 same problem, replace the
drum unit with a new one.
Fig. 6-10 Scattering Toner