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For repair and maintenance a special Fialka Test Device must have been
available. This device was connected to the special test socket at the
left side of the machine, instead of the shorting connector that is normally
placed in the socket. So far we have never seen the actual test device,
so we can only speculate about its functionality.
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The test socket has 35 conect pins, divided over three rows. It is wired to
various parts of the Fialka, including the power supply, the keyboard encoder
and the printer. In normal use, a plastic shorting plug should be present in the
test socket (see below).
We recently found the connector that fits the test socket.
It is shown in the image on the right. The connector was probably used for the
connection of a test device. The shorting plug must be removed before the
test connector can be fitted. More images of this connector are below.
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Inside the shorting plug (that is normally present in the socket) are 8
shorting wires. It is fixed to the socket by means of two screw terminals.
Without this plug, Fialka will not work. When removing the plug from a
working Fialka, be careful not to lose it.
The image below shows how the shorting plug should normally be fitted to
the test socket. It shows connector Ш2 when looking into
the socket from the left side of the machine.
When the shorting plug is removed, the 24V power supply is cut-off.
Furthermore, the data path from the mechanical 5-bit keyboard encoder to
the diode matrix is interrupted, so that the keyboard can be checked and
test characters can be sent to the printer.
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© Copyright 2009-2011, Paul Reuvers & Marc Simons. Last changed: Tue,27 Dec 2011.17:43:07
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