HP (Hewlett-Packard) CF081A#BGJ Benutzerhandbuch
Paper feeder cassette lift operation
The cassette lift operation keeps the stack surface of paper at a specified height to maintain stable
media feeding. The paper-feeder driver controls the paper-feeder lifter motor (M2) and monitors the
paper-feeder media stack surface sensors (SR1, SR2) to adjust the stack height when the printer is
turned on, when the printer recovers from sleep mode, when the paper-feeder cassette is installed or as
needed during a print operation. The paper feeder has two paper-feeder media-stack surface sensors.
The paper-feeder media stack surface sensor 1 detects the stack height during a print operation. The
paper-feeder media-stack surface sensor 2 detects the stack height when the printer is turned on, when
the printer recovers from sleep mode and when the paper-feeder cassette is installed. The operational
sequence of the lift operation is as follows:
1.
The paper-feeder driver rotates the paper-feeder lifter motor to lift the lifting plate.
2.
The paper-feeder driver stops the paper-feeder lifter motor when the paper-feeder media-stack
surface sensor 2 detects the stack surface.
3.
The paper-feeder driver rotates the lifter motor again when paper-feeder media stack surface 1
detects that the media surface is lowered during a print operation.
Figure 1-50
Paper-feeder cassette lift
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Chapter 1 Theory of operation
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