Ricoh B234 Service Manual page 1235

OVERALL MACHINE INFROMATION
Sensors
No.
S10 1st bottom plate position sensor
S11 2nd Lower Limit Sensor
S12 2nd tray cover sensor
S13 2nd paper set sensor
S14 2nd Paper Feed Sensor
S15 2nd Paper Length Sensor
S16 2nd paper upper limit sensor
S17 2nd Pick-up Roller HP Sensor
S18 2nd Transport Sensor
S19 2nd bottom plate position sensor
S20 2nd Vertical Transport Sensor
S21 Entrance Sensor
S22 Exit Sensor
S23 Vertical Exit Sensor
Switches
No.
SW1 Front Door Switch
SW2 Transport Cover Switch
SW3 1st Paper Width Switch
SW4 2nd Paper Width Switch
B835
Name
Name
36
Description
Detects the top of the paper stack in the 1st tray
when it is at the proper height for feeding and
stops the 1st lift motor.
Detects 1) whether the 2nd tray is down or not
when the tray is not operating, and 2) detects
when the tray is full when the 2nd tray is
operating.
Detects when the 2nd tray cover is open/closed.
Detects paper placed on the tray and starts the
2nd lift motor to raise the bottom plate. This
sensor also detects a jam if the paper stops and
does not leave the 2nd tray
Detects jams when the feed roller feeds paper
from the 2nd tray.
Used in combination with 1st tray width sensors
to determine the size of paper in the 1st tray.
When an actuator falls into the gap of this
sensor, this signals paper near end in the 2nd
tray.
Detects whether the 2nd pick-up roller is up or
not.
Detects jams at the point where the 2nd
Transport roller pulls paper from the 1st tray.
Detects the top of the paper stack in the 2nd tray
when it is at the proper height for feeding and
stops the 2nd lift motor.
Detects jams in the vertical path after a sheet is
fed from the 2nd tray.
Detects paper jams where paper from the copier
enters the unit in the horizontal feed path.
Detects jams where through-paper and covers
exit the unit.
Detects jams where through-paper and covers
exit the vertical feed path.
Description
Detects whether the front door is properly closed.
The unit will not operate when the front door is
open.
This is the cover on the right side of the tray unit.
Detects whether the cover is opened or closed.
Used in combination with the length sensors to
determine the size of paper in the 1st tray.
Used in combination with the length sensors to
determine the size of paper in the 2nd tray.
SM