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PRESYS
| Instruments
4.0 - Maintenance
4.1 - Controllers Hardware
Controllers maintenance requires the user to have access to the instrument
hardware. The controller hardware is divided into three main circuit boards: the Display
Circuit Board, the CPU Circuit Board and the Power Source Circuit Board. The three
circuit boards are attached to the aluminum case by only one screw located at the front
panel. Loosen this screw and pull the controller front panel to remove the instrument
from its case.
The Display Circuit Board is located on the controller's front panel. The front
panel is provided with four internal retaining brackets located on the four corners which
keep the CPU Circuit Board and the Power Source Circuit Board attached together. A
spacer is screwed between the CPU Circuit Board and the Power Source Circuit Board
to confer the set a greater rigidity. To open the set follow the instructions below:
i) Remove the screw attaching the spacer located on the rear part of the circuit boards.
ii) Turn the controllers so that its display will be positioned opposite to reading direction.
iii) Just loosen the retaining bracket located on the RH upper corner of the front panel.
iv) Disengage the upper circuit board toward the right and open the circuit boards as
shown on figure 32.
Power Supply Board
Fig. 32 - Controllers Hardware
DCY-2050 and DCY-2051
CPU Board
Maintenance
Page 51
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