Problem:
My Intellabeam won't work although the DMX appears to be OK.
The Intellabeam uses a non compliant DMX input circuit, this circuit is seen by the Diamond 4 and Borris 3 console protection circuits as a fault condition.
Background:
The Diamond 4 and Borris 3 use circuits that have been designed to work with future standards of DMX such as RDM and are fully backward compliant to all DMX compliant devices. We have also included protection circuits which prevent DMX line drivers and other circuits being damaged from accidentally applied voltages to the DMX line.
Solutions:
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Highly recommended, best option:
Use an Avolites Rack or Truss splitter to buffer the signal. (Other splitter units may work, however they probably will not if there have DMX protection fitted.)
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Recommended only in an absolute emergency since this may damage the motherboard and this will not be covered under the Avolites warrantee.
Remove the protection devices marked PT from the Avolites console by shorting them out on the reverse side of the PCB. See the schematics given below for details.
Note that this will invalidate any Avolites Warrantee.
Make sure the console is clearly marked that the protection circuits have been removed and date the note for future engineers to see!
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Contact HighEnd Systems technical support seek guidance from them.
It may be possible to replace the input receiver in the Intellabeam with a more sensitive part such as an HP2300. Their web site is
www.hiend.com
Additional information:
The DMX input circuit for the Intellabeam is published on the Hi
End web site at:-
ftp://ftp.highend.com/pub/Products/Intellabeam/Schematic/Ibeam.pdf
The output circuit schematic for an Avolites Splitter,
Boris 3 motherboard and Diamond DMX output are shown below.
