Brother HL-4000CN Service Manual page 288

Rolls related with image quality troubles and interval appearing on prints are shown in the
table below.
Roll
Magnet roll
Padolle
Drum
HTC
IDT 1
IDT 2
Transfer roll cartridge
Heat roll
Parts
Print head cartridge ASSY
Transfer roll cartridge ASSY 65 mm
Fuser ASSY
V-78
Cycle
29 mm
7.5 mm
63 mm
23 mm
132 mm
132 mm
82 mm