General Information
Phaser 6600 and WorkCentre 6605 Xerox Internal Use Only
Service Manual
1-36
Laser Unit
The Laser Unit (PL2.1.1) is an exposure device that outputs laser beams to form an electrostatic latent
image on the drum surface. The Laser Unit consists of the following parts.
• Scanner Motor — spins the Polygon Mirror
• Laser Diode Board — holds the Laser Diodes, converts the image data into laser beams, and
controls the other components in the Laser Unit.
• Humidity/Temperature Sensor
• SOS Sensor — detects the laser beam at the scan starting point, and sends a signal to the MCU
Board.
s6600-264
Laser UnitLaser Unit
Scanner Motor
Laser Diode BoardSOS Sensor