(Copy lamp control in each copy density)
(Optical system dirt correction)
The SF-2314/2414 perform dirt correction by changing the copy lamp
intensity according to the dirt degree in the optical system (the copy
lamp unit, No. 1 mirror, No.2 mirror, No.3 mirror) to prevent against
remarkable degrading of copy quality.
The reference value is the AE sensor output value which is obtained
when the reference plate is exposed with the copy lamp voltage of
67.7V (135.4V) at power ON.
This value is checked with sim 44-02.
The mirror base scan speed (mirror motor rpm)
is changed to zoom.
Copy paper
feed direction
The lens and the mirror are
moved to zoom.
The mirror scan speed is changed to zoom.
Mirror scan speed
Drum rotating speed < Mirror scan speed
Enlargement
Original
The lens
and the
mirror are
move to
zoom.
Reduction
80
70
60
50
(V)
EX1
2
3
4
EX5
[MAX. 85V(170V)]
[MIN. 40V(80V)]
CLV
(Copy lamp
application
voltage)
40
Reference plate (Glass holder)
Table glass
Copy lamp light quantity "UP"
Automatic exposure
sensor
CPU
Reference value
> Measured value
Correction data output
5 – 5
