Paper Size Detection
Both the trays are universal trays.
Paper size sensors: Detect the paper length
The position of the sensor actuator is controlled by the position
of the end fence
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Only the length is detected directly.
The actuator has patterns of studs on the rear.
These studs turn the paper size sensors on/off.
This also tells the cpu that the tray is in the machine.
For a paper size detection table, see the service manual.
If other paper sizes are used, they must be selected with a user tool:
System Settings - Tray Paper Settings - Tray Paper Size (Tray 3,
Tray 4).
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