Canon iR6570 series, Руководство по обслуживанию

Страница: 278 / 684

Chapter 8
8-14
8.4 Cassette Pick-Up Unit
8.4.1 Lifter Operation (cassette 3/4)
0009-3164
When the cassette is pushed into the machine, the cassette open/closed sensor goes on and, at the same time, the pickup roller starts to move down. At this
time, the light-blocking plate leaves the lifter sensor, causing the cassette lifter motor to go on and the lifter to move up. When the lifter moves up and the
lifter sensor detects the surface of paper, its ascent stops.
When the open button of the cassette is pressed, the drive gear of the lifter becomes disengaged, letting the lifter to move down under its own weight.
T-8-10
The following diagram shows the components of the cassette pickup unit:
F-8-13
8.4.2 Detecting the Presence/Absence of Paper
0009-3167
The presence/absence of paper inside the deck or the cassette is checked by the cassette paper sensor.
- Paper Present
Cassette 3 Cassette 4
Cassette opening/
closing cassette 3 opening/closing cassette 4 opening/closing
Detection sensor (PS15) sensor (PS16)
Lifter position
detection cassette 3 lifter sensor (PS17) cassette 4 lifter sensor (PS18)
Paper detection cassette 3 paper sensor (PS13) cassette 4 paper sensor(PS14)
Paper level detection cassette 3 paper level detection
PCB
cassette 4 paper level detection
PCB
(variable resistor) (variable resistor)
Lifter ascent limiter --- ---
drive motor cassette 3 lifter motor (M20) cassette 4 lifter motor(M21)
Paper sensor
Feed roller
Separation roller
Lifter
Lifter sensor
Cassette open/closed
sensor
Paper
Pickup roller
Pickup roller
Retry sensor