Canon DR-9080C Service Manual page 48

CHAPTER 2 FUNCTIONS & OPERATION
3. Document Tray Control PCB
(10_SUB)
Fig. 2-403 shows a block diagram of the
document tray control PCB (10_SUB). The CPU
mounted on the document tray control PCB
performs the following functions.
1) Receives instruction from the pick-up control
PCB to control the retard roller and
document tray motor
Document guide
width sensor
Document
sensor
Document tray
HP sensor
Staple LED
Staple LED
Registration
clutch
Retard motor
Document tray
motor
Shading solenoid
(Lower side)
2 - 24
VR1
PS4
PS1
PCB
CL1
M5
M6
SL3
COPYRIGHT © 2003 CANON ELECTRONICS INC.
2) Receives instructions from the main CPU
PCB assemby to control the registration
clutch
3) Processes signals from the sensors
4) Controls the staple LED PCB
Document tray control PCB
Position
sensing
circuit
Staple
photo-sensor
Motor drive
circuit
Motor drive
circuit
Fig. 2-403
CPU
Main CPU
PCB
Pick-up
control
PCB
CANON DR-6080/9080C REV.0 SEPT. 2003