Canon Paper Deck Unit-B1, Service Manual

Page: 21 / 68

Chapter 2
2-3
F-2-4
2.2 Paper Detection
2.2.1 Detecting the Presence/Absence of Paper
0023-7224
The deck paper absent sensor [1] (PS2D) is used to detect the presence/absence of paper.
The paper [3] deposited on the lifter [2] runs out.
The paper detecting lever [4] of the pickup roller assembly moves past the deck paper absent sensor.
The machine indicates a message to indicate the absence of paper (on the host machine's control panel).
F-2-5
M2D
Host
machine
DC controller PCB
Combination circuit
Motor drive circuit
24V 24V
24V
Deck lifter motor
Deck driver PCB
Deck open detection
switch (SW1D)
Deck lifter
position sensor
PS4D
Deck lifter position
detection signal
(PAP_TOP_SENS)
PS8D
Deck paper supply
position sensor
Deck paper supply position detection signal
(PAP_VL_EMP_U)
Deck lifter lower limit
detecting switch (SW2D)
Deck lifter lower limit
signal (LIFT_LOW_LMT)
PS9D
Deck open sensor
Deck open detection signal (DECK_OPEN_SENS)
PS3D
Deck lifter
upper limit sensor
Deck lifter upper limit
detection signal
(LIFT_M_UPLMT)
Deck open switch
(SW100D)
Deck open signal (DECK_OPEN_SW)
Deck lifter motor drive
signal (LIFT_UP_LIM)
Deck motor error drive
signal (LIFT_M_ERR)
Deck lifter up signal
(DECK_UP)
Deck lifter motor up drive signal
Deck lifter motor down drive signal
Communications conversion IC(IC4)
Note: The communications conversion IC (IC4) in the diagram is used
for conversion between serial and parallel signals.
Deck set sensor
PS5D
Deck set signal (DECK_MOUNT_SENS)
[2]
[1]
[3]
[4]