Riso RP-255, Technical Manual

Page: 223 / 449

FB ORIGINAL SCANNING SECTION
[ 12 - 12 ]
Disassembly
1. Removing the Scanner Unit
(1) Start the Test Mode No. 154 (Scanner Lock Action) to move the carriage to the lock position, open
the scanner table, secure the mirror carriage with the screws used for equipment transport, and
then close the scanner table.
(2) Switch off the power, and remove the following covers:
• Rear cover
• Stage cover (if equipped with AF and digitizer, remove them also.)
• Scanner-unit cover, left
• Scanner-unit cover, rear
• Scanner-unit cover, front
• Scanner-unit cover, right
< RN25 Series >
(3) Disconnect the two control-panel connectors, remove the five mounting screws (RS tight, M4 x 8),
and then remove the control panel. (This is done to prevent damage to the control panel.)
(4) Disconnect the FB read pulse motor and FB/AF HP sensor connectors from the scanner unit.
Disconnect the three connectors from the SCAN-IF400-PCB.
(5) Remove the cover-open sensor ass’y with one screw (double-washer, M4 x 8), and disconnect the
connector.
(6) Remove the four screws (double-washer, M4 x 8) securing the scanner unit to the hinge plate.
(7) Remove the six screws (double-washer, M4 x 8) from the scanner unit, and then remove the
scanner unit by lifting it upward. (This is a heavy precision component. Handle with care.)
< RN20/21 Series >
(3) Detach the two connectors from the scanner unit. (Flat cables on main PCB connectors)
(4) Remove the two screws (double-washer, M4 x 8) on the two stage cover brackets that secure the
scanner unit.
(5) Remove the stage cover sensor assembly with the screw (double-washer, M4 x 8).
(6) Remove the six screws (double-washer, M4 x 8) on the scanner unit, and remove the unit upwards.
(Take care when handling, as this is a heavy precision unit.)
[Precautions on Reassembly]
• After reassembling, open the scanner table and remove the transport lock screw on the mirror
carriage. Clear the error message using Test Mode No. 155 (Scan Release Action).
< RN20/21 Series >
• When mounting the scanner, align the half-pierced sections of the two front alignment brackets and
those on the two Stage cover brackets.
< RN25 Series >
Prior to reassembly, write down the information on the label at the right side of the top panel of the
scanner unit. Following reassembly, activate the factory-testing mode and set the scanner.