Table 1-18 Cassette-presence detection (continued)
Paper size Cassette media size switch
Top switch Center switch Bottom switch
A4
ON OFF OFF
LegalONONOFF
Cassette absence OFF OFF OFF
Cassette lift operation and cassette paper-presence detection
The product keeps the paper stack surface at the correct pickup position. The cassette lift-up operation is
performed under the following conditions:
●
The product is turned on
●
The cassette is inserted
●
The paper stack surface in the cassette lowers
Figure 1-37 Cassette lift mechanism
Lifter motor
Lifter
SR1
SR23
Cassette media presence sensor lever
Cassette media stack surface sensor lever
Lifting plate
DC controller
Cassette media
presence sensor
Cassette media stack surface sensor 1
Cassette media stack surface sensor 2
SR24
M7
The operational sequence of the cassette lift-up is as follows:
1. The lifter motor rotates and the lifter moves up.
2. When the cassette-media stack surface sensor 2 detects the stack surface of media, the lifter motor
stops.
3. The lifter motor rotates again to lift the lifter when the cassette-media stack surface sensor 1 detects
the stack surface and then lowers during printing.
When a cassette-media stack surface sensors does not detect the stack surface within a specified time period
after the lifter motor starts rotating, the DC controller determines a lifter motor failure and notifies the
formatter.
50 Chapter 1 Theory of operation ENWW
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