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Presys Instruments
4.0 - Maintenance
4.1 - Indicator Hardware
The Indicator maintenance requires the user to have access to the hardware
of the instrument. The Indicator hardware consists of four main boards: Display
Board, CPU Board, Power Supply Board and Input Board. The four-board system is
fixed to the aluminum case by a screw on the lower part of the front-panel. Loosen
this screw and pull the Indicator front-panel in order to remove the instrument from
the case.
The Display board is located in the Indicator front-panel. The front-panel has
four internal holders near its four corners which keep together the CPU and Power
Supply Boards. The Input Board is connected to the CPU Board by means of two flat
cables, and the boards are fixed by spacers. There is another spacer between the
CPU and Power Supply Boards. Follow the instructions below to open the set:
i) Remove the screw which fixes the spacer placed near the edge of the CPU and
Power Supply Boards.
ii) Turn the Indicator so that the display is on the opposite side for reading.
iii) Displace carefully the holder at the right top corner of the front-panel so that the
Power Supply Board can be loosen.
iv) Move the Power Supply Board to the right and open the boards according to
Figure 19.
v) Remove the screws which fix the spacers between the CPU and Input Boards.
Fig. 19 - Indicator hardware
DMY - 2015
Maintenance
Página 31
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