2-18 Phaser 4500 Service Manual
Control of Paper Size
Paper Size Switch Assembly The switches in this assembly send a signal that
indicates the paper size setting of the tray. Cams in the bottom of the tray are
positioned by the tray’s end guide. At pre-defined paper lengths, actuators on the side
of the tray close or open the switches in a pattern that is defined in the printer to
correspond to one of the pre-set media sizes.
The following table provides the ON (1) or OFF (0) states of the switches in the Paper
Size Switch Assembly, corresponding to the paper sizes of the Paper Tray.
Note
The switches in the Paper Size Switch Assembly are denoted by “SW1”, “SW2”,
“SW3”, and “SW4”, respectively, from the front side.
Paper size
Paper Size Switch Assembly
SW1 SW2 SW3 SW4
No cassette 0 0 0 0
Executive SEF 0 0 0 1
B5(JIS) SEF 0 0 1 1
A5 SEF 0 1 0 1
Legal14”SEF 0 1 1 1
Letter SEF 1001
A4 SEF 1 1 0 1
Legal13”SEF 1 1 1 1
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