The operational sequence of the cassette lift-up is as follows:
1. The PF lifter motor rotates to raise the lifter.
2. When the PF paper-stack surface sensor detects the surface of the paper stack, the PF lifter motor
stops.
3. The lifter motor rotates again when the PF paper-stack surface detects that the paper surface is
lowered during a print operation.
The paper feeder controller PCA determines a PF lifter motor failure and notifies the formatter through
the DC controller when the PF paper-stack surface sensor does not detect the stack surface within a
specified period after the PF lifter motor starts rotating.
Figure 1-63 1x500-sheet paper feeder cassette lift operation
M2
SR2
SR3
Lifter
Lifting plate
PF lifter motor
PF media stack surface flag
PF cassette media presence sensor flag
PF media stack surface sensor
PF cassette media-out sensor
1x500-sheet paper feeder jam detection
The paper feeder uses the PF paper-feed sensor (SR1) to detect the presence of print-media and to
check whether print-media is being fed correctly or has jammed.
Figure 1-64 1x500-sheet paper feeder jam detection
SR1
Paper feeder 1
The paper feeder detects the following jams:
PF pickup delay jam The PF paper-feed sensor does not detect the leading edge of paper within a specified period,
including a retry, after the PF pickup solenoid is turned on.
PF residual paper jam The PF paper-feed sensor detects a presence of paper when the printer is turned on, when the
door is closed, or when the automatic delivery is performed.
PF door open jam A door open is detected during a paper-feed operation.
86 Chapter 1 Theory of operation ENWW
To Next Page
Loading...