Sharp SF-1014 Service Manual page 27

The mirror base scan speed (mirror motor rpm)
is changed to zoom.
Copy paper
feed direction
The mirror scan speed is changed to zoom.
Mirror scan speed Drum rotating speed < Mirror scan speed
Enlargement
Original
(Copy lamp control in each copy density)
80
70
60
CLV
(Copy lamp
50
application
voltage) 40
(V)
EX1
The lens and the mirror are
moved to zoom.
The lens
and the
mirror are
move to
zoom.
Reduction
[MAX. 85V(170V)]
[MIN. 40V(80V)]
2 3 4 EX5
(Optical system dirt correction)
The SF-1014 perform dirt correction by changing the copy lamp inten-
sity 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 remark-
able 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.
Reference plate (Glass holder)
CPU
Reference value
> Measured value
Correction data output
5 – 5
Table glass
Copy lamp light quantity "UP"
Automatic exposure
sensor