Optical System - Sharp SF-2030 Service Manual

3. Optical System

The optical system must be adjusted according to the following flowchart:
Check the following preset values depending on the focal length of lens (lens number):
• Reference position of 4. and 5. mirror Reference position of lens.
• Reference position of 4. and 5. mirror
• Lateral magnification
• Lens characteristics
Magnification(lateral and longitudinal) in focus at full-size copy
Magnification in focus at reduced (x 0.50) and enlarged (x 2.00) copy
Image distortion, center deviation
Position of exposure-balancing blank lamp, irregularity of copy ends
* The exposure balance, blank lamp position and copy ends can be separately adjusted. But items other than these must be adjusted
according to the steps shown in the above flowchart.
YES
YES
YES
YES
End
Simulation 48-01
Simulation 48-01
Simulation 48-02
Simulation 26-09, 26-08
Focus----- Adjust reference position of 4.
NO
Focus-----
NO Adjust characteristic values of lens
(irregularity of focal length)
Image distortion ---
NO
Center deviation ---
Adjust exposure balance
NO
Adjust blank lamp position
Adjust copy ends (including void area)
7 – 7
and 5. mirror Magnification
Adjust longitudinal magnification
Adjust lateral magnification
Correct longitudinal distortion
Correct lateral distortion
Correct center deviation