Brother International HL-2400C Service Manual - Page 75

(2) Fusing Process (Refer to Fig.4-27.)
Silicone oil supplied from the oil bottle is applied to the surface of fuser roller.  The toner image has been transferred onto the paper, but not yet fused.  Transported paper passes between the heater roller and back-up roller.  Each roller is heated up to approx.140°C, and receives approximately 156N pressure from the opposite heat roller.  When the paper carrying the toner images passes between the two heat rollers, the toner images are melted and fused on the transported paper.  The paper carrying the fused image is separated from the heat rollers, and ejected from the printer. Toner Image (a). Before Fusing M C Y M Y Paper (b). After Fusing Fixed toner R M Fig.4-27 GR IV-26