Canon CLBR 460ps Service Manual page 163

Print paper
Duplex feed unit
Reversing
unit
SL101
<Operation of the duplex feed roller pressure release>
4. Duplexing unit pick-up operation
The duplex driver sends the duplex pick-up paper presence status to the printer after the side
registration adjustment is completed. When the printer receives the duplex pick-up paper pres-
ence status, it can send the duplex pick-up command to the duplex driver. Upon receiving it, the
duplex driver turns the duplex feed motor(M3101) ON and feeds the paper at the same speed
as printing process speed. When the registration paper sensor (PS2) detects the paper fed from
duplexing unit, the printer sends the duplex pick-up stop command to the duplex driver. Upon
receiving it, the duplex driver turns M3101 OFF. When the duplex driver receives the refeed com-
mand synchronized with TOP signal, it turns M3101 ON again. After a prescribed period of time,
the duplex driver turns the M3101 OFF and stops the duplex feed roller.
The paper is fed to the face down delivery tray after the second side of paper is printed.
Power ON
PRINT signal (/PRNT)
VERTICAL SYNC signal (/TOP)
Duplexing unit specification command
Reversing unit paper sensor (PS3101)
Reversing unit stationary paper sensor (PS3103)
Duplex pick-up paper sensor (PS3104)
Registration paper sensor (PS2)
Deflector drive solenoid (SL3102)
Feed roller pressure released solenoid
(SL3101)
Reversing motor (M3102)
Side registration motor (M3103)
Duplex feed motor (M3101)
Duplex feed roller pressure sub roller
Duplex feed roller
Figure 2-7-6
STBY INTR
Duplexing unit specification
3.8
1.1
0.6
1.2
CCW
Figure 2-7-7
Duplex pick-up sensor lever
Duplex pick-up sensor
PRINT
Duplex pick-up stop
Duplex pick-up
0.1 1.0
3.3
0.2
CW
1.8
CHAPTER 2
To printer
(Unit: seconds)
LSTR STBY
Refeed
7.8
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