Component Layout
D373/D374 32 SM
No. Component Function
S2
Pre-stack Tray Exit
Sensor
Detects 1) paper fed from the pre-stack tray to the
stapling tray, and detects 2) paper in the pre-stack when
the copier is switched on. (This sensor performs no
timing function. The entire flow of paper through the
pre-stacking mechanism is controlled by motor pulse
counts.)
S3 Paper Position Sensor
The photosensor that detects the edge of the paper and
sends this information to the punch unit board where it
is used to position the punch for punching the holes in
the paper.
S4
Punch Hopper Full
Sensor
1) A photosensor that detects and signals that the punch
hopper is filled with punch waste and needs emptying,
and 2) confirms the presence of the punch hopper and
signals an error if it is missing or not installed
completely.
S5 Shift Roller HP Sensor
Located near the shift roller motor, controls the
front-to-back movement of the shift roller as shifts paper
during straight-through feed.
S6
Upper Tray Exit
Sensor
A flat, photo sensor located inside the guide plate,
detects the leading edge and trailing edge of the paper
as it feeds out to the upper tray during straight-through
jobs (with and without stapling). When paper is fed to
the upper tray, at the paper output slot this sensor
signals an error when it detects (1) paper has failed to
leave the paper exit (lag error), (2) detects paper has
failed to arrive at the paper exit (late error), (3) detects
paper is in the exit slot when the machine is turned on.
S7
Exit Guide Plate HP
Sensor
Controls the vertical movement of the control exit
guide . The guide plate is in the home position when the
guide plate is down and the actuator interrupts the
sensor gap.
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