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Parasitic Tap of 7-30Vdc (DC to DC converter)
If you cannot find a readily available 5Vdc source; it may be advisable to use a
DC to DC converter, and locate a 7-30Vdc source. Before attempting this you
should consult the monitor’s service manual, or the monitor’s manufacture.
Figure 2.12
DC to DC converter
Follow these steps to use 7-30Vdc and a DC to DC converter:
1 Evaluate the monitor for proper positioning of the DC to DC converter. Make
sure there is sufficient space for cable headers. Also choose a location that
allows the cables to be installed with adequate slack, and provides for easy
access during installation.
2 Find a suitable 7-30Vdc power source on the circuitry of the display. Insure
that the source can sustain the additional load requirements placed on it by
the controller. An acceptable source should be able to supply an addition
100ma with out effecting other systems in the monitor.
3 Solder or splice the non-terminated end of the power cable (part number:
950519-000) to the tap location. Be sure to observe the correct polarity. The
cable (part number: 950519-000) uses the orange conductor for the (+)
signal, and the black conductor for the (-) signal.
4 Connect the terminated end of power cable (part number: 950519-000) to
connector P603 of the DC to DC converter.
5 Connect the 2 position header of cable 429761-000 to connector P604 of the
DC to DC converter.