HP LaserJet 1010 - Page 64

Printer laser/scanner unit
The ECU sends signals to the laser/scanner assembly to modulate the laser diode on and off modes
and to drive the laser/scanner motor.
VDO
/VDO
CNT0
CNT1
/BDI
/BD
/ACC
/DEC
Formatter
Laser driver PCB
Focusing lens
Scanner motor
Four-sided
mirror
Cylindrical lens
BD
sensor
Engine
controller
PCB
Photosensitive
drum
Figure 4-3 Laser/scanner operation
52 Chapter 4 Operational overview ENWW