HP laserjet m712 Fehlerbehebungsanleitung
Table 1-15
Paper deck media switch combinations (continued)
Paper size
Cassette media width switch
Cassette media end switch
Top
Center
Bottom
Top
Center
Bottom
Ledger
OFF
OFF
ON
OFF
OFF
ON
A3
OFF
OFF
OFF
OFF
OFF
ON
Paper deck lift-up operation
The paper deck lifts up the tray to keep the surface of paper at the pickup position whenever the
following occurs:
●
The product is turned on
●
The cassette is installed
●
The paper stack surface lowers by pickup operation
NOTE:
The following figure illustrates the mechanism for paper deck cassette 3, but each paper deck
cassette has the same mechanism.
Figure 1-50
Paper deck lift-up operation
M92
SR92
Lifter
Lifting plate
PD cassette 3 media stack surface sensor
PD cassette 3 lifter motor
Cassette 1
Cassette 2
Cassette 3
The operational sequence of the lift-up is as follows:
1.
The PD cassette 3 lifter motor rotates to raise the lifter.
2.
The PD cassette 3 lifter motor stops when the PD cassette 3 media stack surface sensor detects the
paper surface.
3.
The PD cassette 3 lifter motor rotates again when the PD cassette 3 media stack surface sensor
detects that the stack surface lowers during a print operation.
64
Chapter 1 Theory of operation
ENWW