print command and image data that the host computer sends. Figure 1-2 DC controller PCA block
diagram on page 8 illustrates the DC controller function.
Figure 1-2 DC controller PCA block diagram
Connector PCA
Control panel
Duplex connector PCA
Cartridge
Transfer roller
AC input
Motor
Solenoid
Photointerrupter
DC controller
Laser scanner
Sensor
Fan
Accessory
Clutch
Switch
Photointerrupter
Motor
Fan
Fuser
Low-voltage
power supply
Formatter
Image scanner
Engine
power supply
Duplex ass’y
Motors and fans
The product has nine motors: two brush-less DC motors, one DC motor that has brushes, seven fan
motors, and three stepping motors. The product print engine also has seven cooling fans.
8 Chapter 1 Theory of operation ENWW