Duplexing Unit; Outline - Canon CLBR 460ps Service Manual

VII. DUPLEXING UNIT
A. Outline
The duplex driver PCB controls the sequence of duplexing unit operations. The duplex driver
PCB has an 8-bit microcomputer (CPU) that controls the sequence of duplexing unit operations
and serially communicates with the DC controller PCB in the printer.
The duplex driver PCB drives solenoids and motors according to the duplexing unit specifi-
cation command and the duplex pick-up command sent from the DC controller PCB. The duplex
driver PCB returns the duplexing unit status to the DC controller PCB.
The duplexing unit is driven by +24V and +5V generated in the power supply unit of the
duplexing unit and +5V supplied from the printer.
+24V and +5V generated in the power supply unit of the duplexing unit are for driving motors,
solenoids, and sensors. +5V supplied from the printer is for driving the CPU. The printer also
supplies +5V to the paper feeder.
PS3105
Side registration
home position
sensor
PS3104
Duplex pick-up
paper sensor
PS3101
Reversing unit
paper sensor
PS3102
Face-up sensor
PS3103
Reversing unit
stationary paper
sensor
Duplex feed roller
pressure release
SL3101
solenoid
Delivery deflector
SL3102
solenoid
J91
J83 J81
J85-3 -5 -5 J3103-10
-1 -7 -7 -8
-2 -6 -6 -9
J92
J83 J81
J86-3 -2 -2 J3103-13
-1 -11
-4 -4
-2 -3 -3 -12
J87-3 J3106-1
-1 -3
-2 -2
J88-3 J3106-4
-1 -6
-2 -5
J89-3 J3107-1
-1 -3
-2 -2
J90
J3108-5
-2 -1
-4
-1 -2
J3107-5
-4
Figure 2-7-1
Duplex driver PCB
LED5VR
"H" when the sensor detects the home
SIDESNS
position of the width adjustment guide.
LED5VR
REFEEDSNS
"H" when the sensor detects paper.
LED5VR
"H" when the sensor detects paper.
REARSNS
LED5VR
"L" when face-up delivery is selected
FUCHSNS
or when the reversing unit is open.
"H" when face-down delivery is selected.
+5VR
"L" when the sensor detects paper.
SWBKSNS
+24VA
ATUCLON "H" to release the duplex feed sub roller.
+24VA
FRAPCLON "H" to feed paper to the duplexing unit.
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