Lifter Limiter Control Circuit (Right/Left Deck) - Canon Image Reader-A1 iR5000i Service Manual

2.2.2 Lifter Limiter Control Circuit (right/left deck)

When the CPU on the DC controller PCB generates the motor drive signal, the lifter mo-
tor turns on to move up the lifter. When the deck reaches the lifter sensor, the deck lifter de-
tection signal is sent to the CPU, which in response will stop the deck lifter drive motor.
The deck lift sensor is mounted in consideration of the motor failing to stop. When the
surface of paper reaches the deck limiter, the limit signal will be sent to the DC controller
PCB to cut the drive signal, thereby stopping the lifter motor.
The following is a block diagram of the control circuit:
DC controller PCB
Motor drive
signal
CPU
DC controller PCB
Motor drive
signal
CPU
COPYRIGHT © 2001 CANON INC.
J112
Right deck lifter detection signal
A2
(RDLTP)
J105
J2108
Limit
13
1
detection
circuit
J112
Right deck lifter limit signal
B8
(RDEL)
J115
Left deck lifter detection signal
A5
(LDLTP)
J105
J2108
Limit
12
2
detection
circuit
J115
Left deck lifter limit signal
A2
(LDEL)
F05-202-03
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
CHAPTER 5 PICK-UP/FEEDING SYSTEM
J2105
5
Motor
driver
PCB
6
J2105
3
Motor
driver
PCB
4
Right deck
PS6
lifter sensor
Right deck
M5
lifter drive
motor
Right deck
PS8
limit sensor
Left deck
PS10
lifter sensor
Left deck
M4
lifter drive
motor
Left deck
PS12
limit sensor
5-13 P