Canon ImageRunner iR8500 Series, Service Manual, Page: 433 / 1122

Chapter 9
9-29
9.6 Deck
9.6.1 Outline
0007-0210
iR105i/iR105+ / iR9070 / iR85+ / iR8070
When the deck or the cassette is slid in, the cassette open/closed sensor turns on and, at the same time, the pickup roller starts to move down, causing the
light-blocking plate to leave the lifter sensor, driving the cassette lifter motor and, ultimately, moving up the lifter.
The lifter keeps moving up until the lifter sensor detects the surface of paper. (In the case of the deck right/left, a limiter is mounted to stop the lifter if it
fails to stop moving up.)
When the deck or cassette open button is pushed, the drive gear of the lifter becomes free to let the lifter move down on its own weight.
T-9-24
F-9-32
Right deck Left deck Cassette 3 Cassette 4
Cassette open/
closed detection Deck right open/
closed sensor
(PS23) Deck left open/
closed sensor
(PS33) Cassette 3 open/
closed sensor
(PS40) Cassette 4 open/
closed sensor
(PS45)
Lifter position
detection Lifter sensor
(PS21) Lifter sensor
(PS31) Lifter sensor
(PS38) Lifter sensor
(PS43)
Paper presence/
absence detection Deck right paper
sensor (PS22) Deck left paper
sensor (PS32) Cassette 3 paper
sensor (PS39) Cassette 4 paper
sensor (PS44)
Paper level
detection Deck right paper
level middle
sensor (PS51)
Deck right paper
level upper sensor
(PS52) Deck lifter paper
level middle
sensor (PS54)
Cassette 2 paper
level upper sensor
(PS55) Cassette 3 paper
level detection
PCB (variable
resistor) Cassette 4 paper
level detection
PCB (variable
resistor)
Lifter upper
limiter Deck right limit
sensor (PS24) Deck left limit
sensor (PS34) --- ---
Drive motor Deck right lifter
motor (M13) Deck lifter motor
(M14) Cassette 3 lifter
motor (M16) Cassette 4 lifter
motor (M17)
Paper sensor
Paper detecting
lever
Feeding roller
Separation roller
Lifter
Paper
Deck open/
closed sensor
Lifter position sensor
Pickup roller
Pickup roller
Pickup sensor
Lifter position lever
Limit sensor