Riso RP-255, Technical Manual

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SECOND PAPER FEED SECTION
[ 5 - 12 ]
B
D E
A
F
C
G
5. Removing the Print-Positioning Unit
(1) Remove the rear cover.
(2)
<RN25 Series> Remove the PCB cover, and open the main PCB bracket.
Remove the connector bracket.
<RN20/21 Series> Remove the controller.
(3) Remove the timing gear spring [A].
(4) Unplug the connectors on the vertical centering sensor [B] and print-positioning pulse motor [C].
(5) Remove the E-ring on the cam follower arm [D], and remove the cam follower arm [D] and washers
[F] (one each on the front and rear of the cam follower arm [D]) from the timing gear [E].
(6) Remove the mounting screws (RS tight, M4 x 8: 6 pcs) on the print-positioning unit [G], and then
remove the print-positioning unit [G].
[Precautions on Reassembly]
• When mounting the print-positioning unit [G], the timing gear [E] should be turned all the way in the
clockwise direction.
[Adjustment after Reassembly]
• Adjust the timing cam mounting position.
A: Timing gear spring
B: Vertical centering sensor
C: Print-positioning pulse motor
D: Cam follower arm
E: Timing gear
F: Washer
G: Print-positioning unit
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