Riso RP-255, Technical Manual

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MISCELLANEOUS PRECAUTIONS
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7. Drum-Control PCB Replacement
(1) Pull out the print drum, and replace the PCB with a new one.
(2) Install a new Drum-Control PCB, and set the print drum in the machine.
(3) Enter the Test mode.
(4) Using Test Mode No. 095 (Solenoid-Counter Enable/Disable Setting), disable the solenoid counter.
(The solenoid counter must be disabled before the replacement work is conducted.)
(5) Run Test Mode No. 588 (Print Drum Code), and enter the print-drum code (refer to Chapter 18 “Test
Mode”).
(6) Execute Text Mode No. 557 (Inking Action).
(7) In the case of RN25 Series, run Test Mode No. 587 (Ink Color Code) and enter the No. of the ink
color used.
(8) Switch off the power and then switch it on again.
(9) Confirm that the machine starts up correctly.
8. Print Position Adjustment
* Check and adjust the mechanical sections first.
It is important that the mechanical sections, such as the main unit drive section, paper feed section,
and print drum, have been correctly adjusted before making the print position adjustments listed below.
(1) Adjust master making image elongation and shrinkage.
(2) Adjust scanning image elongation and shrinkage.
(3) Adjust the master clamp amount.
(4) Adjust scanning start position.
(5) Adjust the master making start position.
(6) Adjust the vertical print home position.
• If the print position is offset from the original even after performing adjustment steps (1) to (5),
measure the offset, and adjust by the offset amount in Test Mode No. 680 (Vertical Center
Adjustment).
* Adjusting the AF (Auto-Document-Feeder) print positioning.
Make test-mode adjustments on the Flatbed (FB) scanning unit before making the test-mode
adjustments on the Auto-Document-Feeder (AF) scanning unit.