Component Layout
SM 37 B803/B805/D373/D374/D636/D637
& Finishers
(B803/B805/
D373/D374/
D636/D637)
No. Component Function
S19
Upper Tray Full
Sensor (B804/B805)
B804
: When the actuator on the side of the upper fence
enters the gap of this sensor, the sensor signals that the
upper tray is at its lowest position (full) and stops the
job.
B805: One of two upper tray full sensors. This is the
higher tray full sensor for A3 and other heavy paper.
The other upper tray full sensor (20) is for lighter paper.
S20
Upper Tray Full
Sensor (B805 only)
B804: This sensor is not used on the booklet finisher.
There is only one upper tray full sensor (S18).
B805: One of two upper tray full sensors. This is the
lower tray full sensor for A4 and smaller paper. The
other upper tray full sensor (19) is for larger paper.
S21 Punch Unit HP Sensor
Switches off the punch movement motor when the
punch unit returns to its home position. Pulse counts
determine where the punch unit pauses for punching
and reversing.
S22
Paper Position Side
HP Sensor
Controls the movement of the paper position detection
unit. Switches on when the horizontal detection unit is at
the home position (HP is the reference point).
S23 Punch HP Sensor
Detects the home position of the punch unit and
controls the vertical movement of the punches when
they fire.
S24
Punch Encoder
Sensor
When the punch mode is selected for the job (2-hole,
3-hole, etc.), the machine controls the operation of the
punch drive (M24) motor which drives a small encoder
shaped like a notched wheel. This wheel is rotated
forward and reverse precisely to select which punches
are moved up and down during the punch stroke.
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