Brother HL-2700CN Service Manual page 74

(2) Specification:
Specification of Laser Unit is described as follows:
Item Specifications
Rated Output of Laser Diode 5mW.
Wave Length of Laser Beam Approx.785nm.
Scanning Density 600dpi
Scanning Width 314mm
Rotations Per Minutes of Scanner Motor 35,904rpm
Number of Polygon Mirror Faces 8
IV-21