Resolution Adjustment Check; Paper-Feed Distance Accuracy Check; Image-Sensor Offset (Joint Accuracy); Offset Check - GRAPHTEC CS2000 Service Manual

10.5 Resolution adjustment check

Check the resolution and accuracy of the CS2000.

1. Paper-feed distance accuracy check

Use the adjustment test chart to confirm that distances measured on the scanned image are within ±0.05%.
• Scan Settings
Document Info.: Size: A0, Resolution: 600 dpi
Scan Settings:

2. Image-sensor offset (joint accuracy)

Use the adjustment test chart to confirm that the joints are within ±1 dot at four positions on the scanned
image for both primary and secondary scanning.
• Scan Settings
Document Info.: Size: User-defined, Width: 1000 mm, Length: 200 mm, Resolution: 600 dpi
Scan Settings:

3. Offset check

Use the adjustment test chart to confirm that the left-hand solid rectangular scanning start mark is within 6 to
11 dots from the top of the scanning window.
• Scan Settings
Document Info.: Size: User-defined, Width: 1000 mm, Length: 200 mm, Resolution: 600 dpi
Scan Settings:

4. Resolution check

Check the resolution using the MTF adjustment test chart.
• Start up OPS112.
• Open the scanning window, set the scanning conditions specified below, and start
scanning.
• Confirm that the resolution (six line pairs) can be determined.
• Scan Settings
Document Info.: Size: User-defined, Width: 1000 mm, Length: 200 mm, Resolution:; 600 dpi
Scan Settings:
The color intensities between the sensors must be virtually identical for the resolution pattern.
If the resolution pattern includes solid-colored sections (black or white), adjust the Intensity and confirm that the
solid sections are reduced and appear as vertical stripes).
CS2000-UM-251-9370
Output: Bilevel
Output: Bilevel
Output: Bilevel
Output: Bilevel monochrome, Intensity: 195, Intensity correction: 1, Edge adjustment: 1
10. ADJUSTMENTS USING THE SOFTWARE
10-20