Canon CLBP-460PS, Service Manual

Page: 163 / 566

Figure 2-7-6
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.
Figure 2-7-7
2 - 105
CHAPTER 2
Reversing
unit
Duplex feed roller
Duplex feed roller pressure sub roller
Duplex pick-up sensor
Duplex pick-up sensor lever
Duplex feed unit
Print paper
To printer
<Operation of the duplex feed roller pressure release>
SL101
Duplexing unit specification
Duplex pick-up
Refeed Duplex pick-up stop
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)
Reversing motor (M3102)
Side registration motor (M3103)
Duplex feed motor (M3101)
(Unit: seconds)
Power ON
STBY INTR PRINT STBY LSTR
CW CCW
3.8
0.6 3.3
1.2
1.8
0.1 1.0
0.2
7.8
1.1
Feed roller pressure released solenoid
(SL3101)