Brother HL-4000CN Service Manual page 144

2.1.8 Cover top main
Note:
Before removing the cover top main, remove the toner cartridges.
1) Open the cover ASSY top print head cartridge.
2) Remove 2 screws securing the cover top main to the printer.
3) Release the 4 hooks securing the cover top main to the printer.
4) Raise the cover top main slightly from the printer and extract the left front edge of the
cover top main deflecting it leftward.
5) Remove the cover top main from the printer.
Cover top main
Screw,
M3x10
Fig.4-16
IV-12