Image Scanner Position Adjustment - Riso RZ3xx Series Technical Manual

CHAPTER 12: FB ORIGINAL SCANNING SECTION (300 dpi)

4. Image Scanner Position Adjustment

For this adjustment to be effective, the paper feeding area, especially the skew of the paper needs to be pre-
adjusted. Also the three adjustments on the scanner unit described on the previous page, and the six
adjustments on the master-making (described on Chapter 14) must also be pre-adjusted.
Checks and adjustment
(1) Set B4-size papers on the paper-feed tray, use test chart No.15 to make a master, then print.
(2) Compare the print against the original and confirm the direction and the amount if the image is offset.
(3) If an adjustment is required, use test mode No.288 (Scanner HP & Service Positioning) to bring the
image scanner to the service position. The service position is where the screws and adjusting cams are
visible from the holes on the scanner unit.
(4) Switch off the machine power and remove the following components.
- Scanner cover;paper feed
- Scanner cover;paper ejection
- Original stopper
- Stage glass
< If the image is horizontally shifted >
Loosen the screw-A (1pc) and make horizontal adjustment by rotating the cam-A. Rotating the cam in
the clockwise direction by one click moves the image 0.17mm to the right.
< If the image is skewed >
Loosen the screws-B (2pcs) and make image-skew correction by rotating the cam-B.
Rotating the cam in the clockwise direction by one click brings the image on the left-hand-side of the
paper 0.047% down.
(5) Mount the stage glass and original stopper back on the scanner unit. Make a master and confirm that the
image on the print lines up with the original. Repeat the adjustment if required.
Screw-B
Cam-B
Screw-B
RISO Inc. Technical Communications
Cam-A Screw-A
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Image scanner
Image scanner
carriage
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