Cassette Lift Operation; Lift-Up Operation; Lift-Down Operation; Table 1-7 Media Switch Combinations - HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung

The cassette media-size detection and the cassette-presence detection are not performed during Sleep
mode. The following table lists the combination of the switches.
Table 1-7
Paper size
Cassette
absence
A5-R
B5-R
Executive-R
Letter-R
A4-R
8.5 x 13 in
Legal
B4
Ledger
A3

Cassette lift operation

There are two types of cassette lift operation: cassette lift-up and cassette lift-down. The paper stack
surface is lifted up to the pickup position. The lifting plate is lifted down when the pickup operation is
not performed. The lift-up and lift-down operations are described in the following. Both upper and lower
cassettes perform the same operation.

Lift-up operation

The DC controller rotates the cassette lifter motor until the cassette lift-up sensor detects the lifter rack.
Accordingly the lifter moves up and the lifting plate moves up to the pickup position. The lift-up
operation is performed when the product is turned on or when the cassette is installed.
The DC controller determines a cassette lifter motor failure and notifies the formatter when the cassette
lift-up sensor does not detect the lifter rack within a specified period from when the lift-up operation
starts.

Lift-down operation

The paper loaded in the cassette presses against the cassette pickup roller when the lifting plate is in
the pickup position. If this condition is kept for a long time, the paper deformed and a pickup failure
may occur. Therefore, the lifting plate is moved down to release the paper from the pickup roller when
a print operation is not performed.
36 Chapter 1 Theory of operation
Media switch combinations
Cassette media width switch
Top Center
OFF OFF
OFF OFF
ON ON
OFF ON
OFF ON
ON ON
OFF OFF
OFF OFF
ON ON
OFF ON
ON ON
Cassette media end switch
Bottom Top
OFF —
OFF —
OFF —
OFF —
ON —
ON —
OFF —
OFF —
OFF —
ON —
ON —
Center Bottom
OFF OFF
ON ON
ON ON
ON ON
ON ON
ON ON
ON OFF
OFF ON
OFF ON
OFF ON
OFF ON
ENWW