Riso RP-255, Technical Manual

Page: 270 / 449

AF SCANNING SECTION (RN20/21 Series)
[ 14 - 17 ]
Top
Bottom
Figure 1 Figure 2
X X
T
A
B
C
A: AF mount plate
B: Nut
C: AF slide screw
1421
5. AF Image Skew Adjustment
Checks and adjustment
(1) Set B4-size paper in the paper-feeding tray. Using the AF unit, create an original-size master with
the Test Chart No. 15, and then print.
(2) Lay the print on top of the original with the 310-mm lines at the side parallel, and check that the
skew (X) of the leading 180-mm line is within 2 mm.
(3) If the skew is outside the specified parameters, adjust as follows.
(4) Remove the screw (bind, M4 x 6) on the AF mount plate [A], rotate through 180° to open the AF unit
to 90°, and then loosen the two AF unit retaining screws (bind, M4 x 10).
(5) Loosen the nut [B] on the hinge assembly (right), and turn the AF slide screw [C] (clockwise if as in
Figure 2, and counterclockwise if as in Figure 1) to adjust dimension T . Turning the screw clockwise
increases dimension T.
(6) Tighten the two AF unit retaining screws, and then tighten the nuts with the AF slide screw secured.
(7) Make a master and print, and repeat the procedure from the beginning if the skew is still outside the
specified parameters.
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