Cassette Paper Size Detection - Canon iR2020 Series Service Manual

Chapter 7
starts rotating.
4) When the pickup roller rotates once, the toothless portion of the pickup roller drive gear comes to the position of the relay gear and consequently drive power of
the main motor is not transferred, stopping the rotation of pickup and feed rollers.
5) The picked up paper is fed to the registration roller through the vertical path roller.

7.3.3 Cassette Paper Size Detection

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
The size of the paper in the cassette is detected by the DC controller PCB when the user changes the position of the cassette paper size lever. When the cassette is
inserted in the iR host machine, the paper size lever pushes the paper size switches provided in the iR host machine to allow the DC controller PCB to detect presence
of the cassette and the size of paper. Paper size switches are arranged as shown below. Paper sizes are determined by the combinations of the switches pushed by
the paper size lever.
PSIZ
E1
PSIZ
E2
PSIZ
E3
PSIZ
E4
ON:The push switch is pushed.
OFF:The push switch is not pushed.
*:Not used.
7-8
PSIZE4
PSIZE3
A3 A4 A4R A5 B4 B5
ON OFF ON OFF OFF ON
OFF ON OFF ON OFF OFF
OFF OFF ON OFF ON OFF OFF
OFF OFF OFF ON OFF ON
F-7-13
PSIZE1
PSIZE2
F-7-14
T-7-8
B5R LGL 11x17 LTR LTRR
ON OFF ON ON ON
ON ON OFF ON ON
ON ON OFF ON
OFF OFF ON ON OFF
STM
U1* U2* U3*
T
ON OFF OFF OFF
ON ON OFF OFF
ON ON ON OFF
ON ON ON ON
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