Riso RP-255, Technical Manual

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PAPER EJECTION SYSTEM
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A B C D
D
C
1.0–1.5 mm
F
E
G
Adjustment
1. Separator Mounting Position
Checks and adjustment
(1) Using Test Chart No. 15, create a master and make prints. Confirm that no misfeeding of paper or
black streaks are caused by the separator contacting the center of the print drum (acceptable if
there is no misfeeding of paper when a 5-mm margin is provided at the top).
(2) If misfeeding of paper occurs or a black streak appears on the printed paper, bring the print drum to
position A, switch off the power, detach the rear cover, open the System PCB bracket in the case of
the RN25 Series, and remove the separation fan unit.
(3) Insert a screwdriver through the insertion point [B] at the bottom left of pressure lever A [A], and
loosen the retaining screw [D] on the separator positioning plate.
(4) Insert a penlight deep into the suction unit, and position the separator [E] so that its tip is visible
through the square hole on the side panel immediately above the pressure lever A [A].
(5) Move the separator positioning plate [C] and tighten the separator positioning plate retaining screw
[D] so that the gap between the separator [E] tip and the print drum surface [F] is 1.0 mm to 1.5
mm.
Symptoms
• If the tip of the separator [E] touches the print drum surface [F], it will scratch the surface of the
master, causing a black line on the printed sheets.
• Conversely, if the gap is too wide, paper will not be properly separated from the print cylinder (drum),
and misfeeding of paper may occur.
A: Pressure lever A
B: Screwdriver insertion point
C: Separator positioning plate
D: Separator positioning plate
retaining screw
E: Separator
F: Print drum surface
G: Separator positioning plate base
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