Having checked my voltages at the display after an issue with it going off, I have found that my -98 is -87 and my -110 is -102.
Is this likely to damage the display in any way?
Is this likely to damage the display in any way?
Pinball info
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Data East DMD voltages
- Thread starter Carl Spiby
- Start date
Very unlikely, they would have to be heading in the other direction to cause concern.
OP
OP
It *had* horizintal lines appearing like interference, then it went off to a single bright line. After checking voltage and pulling connectors off and on a few times it seems to have sorted itself.
What is the 5v mod out of interest?
What is the 5v mod out of interest?
OP
OP
Lw3, 12v and 5v to the display/controller are pretty good.
Doubling up of power cables from the supply to the DMD for large displays.
http://www.marcospecialties.com/pinball-parts/500-6326-00
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- Jul 21, 2011
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OP
OP
So even though you're working with minus voltages, under-voltage is still safer than over? (this is one thing that really confuses me).
You said it yourself... under-voltage is safer than over voltage which will blow things up. The plus or minus is from a reference point - too much is always too much and will do damage. Indeed the circuits are pretty much the same for +110v and -110v, it just where they are fed from and reference to earth that determines the plus or minus aspect.
IIRC as long as dmd voltages are somewhere vaguely near quoted voltage,and are approx 12v different it all works ok
You sure it's a voltage prob? Have you checked ribbons and for oxidisation on ribbon connections?
OP
OP
It did turnout to be the ribbon yes.
