UFO Service V2 Mar02 625-030.pdf

Section 18
CROSS-FOLD UNIT
SERVICE
18.1 .....Control Box
The control box contains the printed circuit board, relay, and
switches that are required to operate the machine and may be
removed as follows:-
Switch off the power supply at the isolator on the rear panel of the
main unit, and dis-connect the crossfold cable plug from the 8 -
way socket which is also on the rear panel of the main unit. (On 16
page units you will also need to remove the 8 page units 8-way plug
from the socket on the rear of the control box)
Remove the operator side cover and dis-connect the guard and
motor plugs from the rear of the control box. Also remove the
grounding (earth) cable fixing nut.
Remove the four screws located at the corners of the control box
front panel and carefully slide the box out of the machine.
Access to the PCB, relay, and switches can now be gained by open
the lid after slackening off the two retaining screws.
Replacement is a reversal of the above procedure.
18.2 .....Motor Speed Control Board and Relay
The motor speed control board (PCB) is mounted on four supports
within the control box, and may be removed by depressing their
tangs after disconnecting all the cables from the terminal block.
To help with re-installation of the PCB, the circuit diagram on the
previous, page will help you to re-connect the cables correctly.
The relay may be removed by dis-connecting all the cables from
the tab terminals and removing the two M3 nuts and bolts from the
relay cover.
Minimum and maximum motor speeds may be set by adjusting the
pre-sets on the PCB, but the IR compensation and current limit
controls should not require altering from their factory settings.
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