Kyocera FS C5020N - Color LED Printer Service Manual page 144

2F3/2F4
The paper size dial has predetermined patterns of activating the paper size switches using concaves and convexes
according to paper sizes. SW1, SW2, and SW3 produce corresponding signals for paper sizes.
Engine controller PWB
105
CAS0
106
CAS1
107
CAS2
ASIC
(U13)
Cassette size switch
SW1
SW2
SW3
2-1-2
Sensor PWB
CAS0
CAS1
CAS2
Paper size
Cassette
Other Legal
not Letter
installed
H H H
H H L
H L H
SW1
SW2
SW3
Cassette size switch
A4 A5 B5
H L L L
L H H L
L H L H
Figure 2-1-3
Paper cassette
Paper size dial
L
Concave
(Function Off)
L
Convex
L
(Function On)
Paper size dial