Ricoh B286 Service Manual page 604

Electrical Components
NUMBER
S27 Roll End Sensor 3
S28 Roll End Sensor 4
S29 Toner Overflow Sensor
S30 Upper Unit Sensor
S31 Wire Cleaner Sensor
Solenoids
Paper Junction Gate
SOL1
Solenoid
SOL2 Pick-Off Pawl Solenoid
Switches
SW1 Dehumidifier Switch
B286/B289
NAME
Detects the trailing edge of the roll after there
is no more paper on Roll 1. This sensor is
included because if the color of the roll core is
not black, Roll End Sensor 1 cannot always
detect roll end.
Detects the trailing edge of the roll after there
is no more paper on Roll 2. This sensor is
included because if the color of the roll core is
not black, Roll End Sensor 2 cannot always
detect roll end.
Detects toner overflow in the used toner
collection bottle.
Detects when the upper unit is open.
The actuator of this sensor is attached to the
wire that moves the transfer cleaner from left
to right. This tells the machine when the wire
cleaner moves. This sensor is a part of the SIB
board.
This controls the paper junction gate in front of
the rear paper exit and below the upper exit.
When closed, paper feeds out at the top.
When open, paper feeds out at the back.
This moves the pick-off pawls until they touch
the drum.
Switches the dehumidifiers (x4) in the roll
feeder on/off.
6-96
DESCRIPTION
SM