Ricoh Gestetner 5450, Service Manual, Page: 54 / 315

MASTER EJECT 1 July, 1998
2-26
Pressure Plate Operation Timing Chart
HP Sensor
Limit Position
Sensor
Pressure Plate
Motor
This timing chart shows how the machine counts the number of home position
sensor on and off edges to check if the eject box is full or if the mechanism is
jammed.
The signal is checked when:
•
The limit position sensor turns on – this is when the pressure plate has turned all
the way to the lower limit position inside the box, which is only possible if the box
is fairly empty.
•
At 6 s after the motor turns on
Drum Master Box Direction Drum Direction
HP
Eject
Position Compressing Position
(Stays for 2 seconds) HP Returned
Does not reach here after 6 seconds
⇒
Motor locked
Check when rotating in the
master box direction
- Check Timing -
When one of the following
occurs:
1. When the Limit Position
Sensor turns on.
2. 6 seconds after the motor
turns on.
Number of HP Sensor On or Off Edges
(The first ‘on’ edge is just after the motor
starts.)
•
5 times
⇒
Normal
•
4 times
⇒
Master box full
•
Less than 4
⇒
Pressure plate locked
(SC06-00 lights)