(Topic ID: 255134)

Data East power supply issue

By jgadzia

14 days ago

Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 12 days ago by Guppy1977
  • No one calls this topic a favorite


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#1 14 days ago

My Data east simpsons display stopped working, i checked the power supply and I am getting -130 volts at the -100 Volt connector, before i realized that was so out of wack i replaced a u16 chip on the display board and replugged it in. Sparks flew everywhere. i checked my soldering and everything appears ok as far as my soldering job, so i am thinking that the -130 volts is frying that chip. What is the most likely culprit on the power supply board that I need to replace?

#2 12 days ago

Hello, it could be D10 and D11.

#3 12 days ago

Are you sure the chip was oriented properly when you installed it? There's usually a notch on the chip for that purpose.

#4 12 days ago

I found some interesting infos here https://www.flippermarkt.de/community/forum/threads/dmd-display-funktioniert-nicht-mehr.120990/. Mike3h said« Using a 1N4004 at D10 on a -00 power supply will allow way too much voltage through and run the small DMD display much too bright. This was done on displays that are outgassed, to use them beyond their normal life, delaying the cost of replacing the display. »

Maybe your D10 is a wrong model?

#5 12 days ago

More infos here at « Missing -110V or -98V for DMD Display Power »

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