Oki B930 Service Manual page 76

1. Side Regi Sensor 1
A reflective photo-sensor to detect the side edge of large paper
Paper side edge is detected by ON/OFF of this sensor while shifting the Puncher (containing
this sensor) in the direction of paper width. The sensor remains at "H" (+5 v) while paper is
present, and turns "L" when paper side edge is detected.
2. Side Regi Sensor 2
A reflective photo-sensor to detect the side edge of small paper. This sensor has the same
function as the Side Regi Sensor 1.
3. Puncher Move Home Sensor
A photo-interrupter to detect the home position of the moving Puncher. It turns "H" (+5 v)
(light blocking) when the home position is detected.
4. Puncher Home Sensor
A photo-interrupter to detect the home position of the Cam Plate that lowers the punching
pins. It turns "H" (+5 V) when the home position is detected.
5. Punch Hole Select Sensor
A photo-interrupter to detect the rear position of the Cam Plate. It turns "H" (+5 V) when the
rear position is detected. This sensor also detects the Cam position to switch punch holes
(2-hole/3-hole).
6. Puncher Front Sensor
A photo-interrupter to detect the front position of the Cam Plate. It turns "H" (+5 V) when the
front position is detected. This sensor is used to determine to which side (front or rear) the
Cam Plate should be moved.
7. Puncher Motor Sensor
A photo-interrupter to detect pulse generated by the actuator attached to the Puncher Motor.
It counts Puncher Motor revolutions, and becomes a trigger to stop the motor (by shutting off
the current).
8. Puncher Move Motor
A stepping motor to move the Puncher in the paper width direction
9. Puncher Motor
A DC motor to move the Cam Plate that lowers the punching pins. Forward rotation of the
motor moves the Cam Plate to the front side, and reverse rotation moves it to the rear side.
10. Punch Box Set Sensor
A photo-interrupter to detect whether the Dust Box is properly set. When the Punch Dust
Box is properly set, the actuator of the box blocks the light transmission of the sensor, which
turns the sensor to "H" (+5 V).
11. Punch Full Sensor
A photo-interrupter to detect the Punch Dust Box is filled with punch dust.
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