Oki B930 Service Manual page 87

sors turn "H". The height of paper or the Stacker Tray is detected based on the levels of these
sensors.
Roll Assy-Transfers
(Driven by Regi Motor)
Puncher
X'port Entrance Sensor
Paper
From H-TRA
Roll Assy Ent
(Driven by Finisher
Transport Motor)
Buffer Roll
(Driven by Regi Motor)
This sensor information is used to control the Elevator Motor. The motor is activated to move the
Stacker Tray while the Stacker Height Sensor 1 turns into the light blocking state to the light
receiving state.
Stacker Height 1 Sensor
Stacker Height 2 sensor
The Stacker No Paper Sensor is turned ON or OFF by the Actuator attached to the Carriage
Assy R on the rear side of the Finisher. In case the Stacker Tray abnormally goes up above the
Stacker No Paper Sensor, the Upper Limit Sensor is installed above the Stacker No Paper Sen-
sor for the protection against the abnormal operation.
If an operator removes paper from the Stacker Tray during printing, it is detected by the Stacker
Height Sensor 2, and the ejection of paper to the Stacker Tray is inhibited. Then the Elevator
Motor is activated to move the Stacker Tray to the Stacker Height Sensor 1 sensing area. Thus,
the ejection of paper to the Stacker Tray is restored.
If an operator removes paper from the Stacker Tray while printing is stopped, it is detected by the
Stacker Height Sensor 2. After three seconds have passed, the Elevator Motor is activated to
move the Stacker Tray to the Stacker Height Sensor 1 sensing area. Thus, the ejection of paper
to the Stacker Tray is restored.
The Stacker Tray lowers according to the volume of paper it contains. If any obstacle under the
tray hinders the tray from lowering, "Stacker Lower safety Warning" is detected and the Stacker
Tray is stopped.
Tray:Hight Tray:Proper
Moves downward
2-78
Transfer Gate
FI6P032A2
Tray:Low
Moves upward
FI6P026A1