- HP Laserjet Enterprise CP4020/CP4520 Manual

Table 1-17 Electrical components for the paper feeder
Component
type
Abbreviation Component name
Motors M1 PD lifter motor 1
M2 PD pickup motor
M3 PD lifter motor 2 (3 x 500-sheet paper feeder only)
M4 PD lifter motor 3 (3 x 500-sheet paper feeder only)
Solenoids SL1 PD pickup solenoid 1
SL2 PD pickup solenoid 2 (3 x 500-sheet paper feeder only)
SL3 PD pickup solenoid 3 (3 x 500-sheet paper feeder only)
Sensors SR1 Tray 3 paper surface sensor 1
SR2 Tray 3 paper surface sensor 2
SR3 Tray 3 paper present presence sensor
SR4 Tray 3 feed sensor
SR5 Tray 4 paper surface sensor 1 (3 x 500-sheet paper feeder only)
SR6 Tray 4 paper present sensor (3 x 500-sheet paper feeder only)
SR7 Tray 4 feed sensor (3 x 500-sheet paper feeder only)
SR8 Tray 4 paper surface sensor 2 (3 x 500-sheet paper feeder only)
SR9 Tray 5 paper surface sensor 1 (3 x 500-sheet paper feeder only)
SR10 Tray 5 feed sensor (3 x 500-sheet paper feeder only)
SR11 Tray 5 paper present sensor (3 x 500-sheet paper feeder only)
SR12 Tray 5 paper surface sensor 2 (3 x 500-sheet paper feeder only)
Switches SW1 PD right door switch
SW2 PD media size switch 1 (3 x 500-sheet paper feeder only)
SW3 PD media size switch 2 (3 x 500-sheet paper feeder only)
SW4 PD media size switch 3 (3 x 500-sheet paper feeder only)
Motor control
The 1 x 500-sheet paper feeder has two motors, and the 3 x 500-sheet paper feeder has four motors
for feeding paper.
Component Drives Failure detection
PD lifter motor 1 M1 Lifter of the upper cassette No
PD lifter motor 2 (3 x 500-sheet paper
feeder only)
M3 Lifter of the middle cassette No
ENWW Optional paper feeder 59