- HP Laserjet Enterprise CP4020/CP4520 Manual

Figure 1-47 3 x 500-sheet optional paper feeder
PD feed roller
PD pickup roller
PD separation roller
Figure 1-48 Signals for the paper feeder
Paper deck
controller
Motor
Solenoid
Photointerrupter
DC controller
Switch
+24V
Paper deck
+3.3V
The input trays contain several motors, solenoids, sensors, and switches, as described in the following
table.
58 Chapter 1 Theory of operation ENWW