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3. Optical system adjustments
For adjustments of the optical system, follow the flowchart below.
Check the following preset values based on the lens focal distance rank (lens number)
Lens reference position adjustment - - - - - Simulation 48-01A
No. 4/5 mirror reference position - - - - - Simulation 48-01D
Horizontal copy magnification ratio - - - - - Simulation 48-02
Lens characteristics input - - - - - Simulation 48-01B/E/C/F
Necessary tools for adjustment
• Scale (which dos not reflect light)
• Test chart (UKOG-0089CSZZ)
• Plus screwdriver
• Hex wrench
Check focusing
magnification ratios
(horizontal and vertical)
at the normal copy
ratio (100%)
YES
Check focusing
magnification ratio at
each magnification ratio in
reduction (0.50) and
enlargement (2.00) by
variations in the lens
focal distance
YES
Check the image
distortion center shift
YES
Check the
exposure balance, the
blank lamp position,
and the lead
edge variation
YES
END
Focus: No. 4/5 mirror reference position adjustmen
NO
Magnification ratio: Vertical magnification ratio
Horizontal magnification ratio
NO
Lens characteristics (lens focal distance
variation) input adjustment
Image distortion: Vertical skew adjustment
NO
Horizontal skew adjustment
Center: Center shift adjustment
Exposure balance adjustment
NO
Blank lamp position adjustment
Copy lead edge adjustment
(including void area adjustment)
Simulation No. 48
Input 1-5
1. Front/rear direction manification ratio adjustment
2. Paper transport direction magnification ratio adjustment
(mirror speed adjustment)
3. Lens characteristics input
4. No. 4/5 mirror characteristics input
5. Mirror speed correction value input
8 – 7
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