Author Topic: Replacing Sega "Jumbo" DMD  (Read 3989 times)

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Offline beaky

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Re: Replacing Sega "Jumbo" DMD
« Reply #60 on: March 16, 2013, 10:50:45 PM »
Your jumper is set right
What you want to do is first set your multimeter to AC and check you have around 12 to 14v AC on the AC terminals on the bridge.
If you don't check the fuse if you do then switch to DC on your meter and check for your DC voltage on the out put of the bridge and on the cap if you do have the Dc voltage then check at the display connector.
If you don't have the correct voltage here then connect the + lead to  to the blue wire on the dmd plug and the - to the - on the bridge. If you do hAve the correct voltage displaying on the meter then this will indicate you have a problem with the ground wire.
If you don't then connect the red meter wire to the + on the bridge and the blk meter wire to the black wire at the dmd display.
If you have the correct voltage on your meter then the problem is with the power on the blue wire to the display.
Hope that makes scene ?
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