Original Table; Lens (Fixed Focus Lens) - Sharp SF-2220 Service Manual

(1) Original table

The original table is fixed. The original is set in the left center position.
Enlargment
Copy direction
Mirror base scan speed is changed for zooming
Normal
Original
(2) Copy lamp
100V series: 85V, 275W
200V series: 170V, 310W
(3) Mirror
This model uses six mirrors.
No. 1 mirror is attached to the copy lamp unit, No. 2/3 mirrors are
attached to No. 2/3 mirror base, No. 4/5 mirrors are attached to No.
4/5 mirror base.
The copy lamp unit and the No. 2/3 mirror base unit are scanned in
copying. The No. 4/5 mirror base is shifted in zoom copying to
change the distance between ten original and the drum.

(4) Lens (fixed focus lens)

•
Construction (1 group 3 lenses)
•
Brightness (F8.5)
Focus: (195mm ±1%)
•
(5) Lens home position sensor (LHPS)
This sensor senses the lens home position. The output signal of this
sensor is the basic signal to control the copy magnification ratio.
(6) Lens base
The lens is mounted to the lens base, which is shifted toward the
paper feed direction in reduction copy or toward the paper exit direc-
tion in enlargement copy by the lens drive motor.
Reduction
5 – 4
Zooming by changing the lens
and mirror position