Brother HL-3450CN Service Manual page 77

CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS
(2) Specification:
Specification of the scanner unit is as follows;
Item
Rated output of laser diode
Wave length of laser beam
Scanning density
Scanning width
Scanner motor speed
Number of polygon mirror faces
Specifications
5 mW.
Approx.785nm.
600dpi
310mm
24,072rpm
6
4-24