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Author Topic: having issues with Data East!  (Read 1499 times)

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having issues with Data East!
« on: May 05, 2015, 02:40:51 am »
Hello everyone.

a new friend of mine has an old Data East simpsons pinabll machine thats experiencing an interesting issue. Heres what i know.

A few months ago, someone came out to work on the machine (it wasnt booting up) from what i can visually tell, part of the power harness was badly burnt and this guy (poorly) wired around it.

when i first was asked to look at the machine, it was randomly restarting or once n awhile would have a loud hum and not boot. I thought i had narrowed it down to the part of the harness the guy hacked up. i managed to solder up and clean up the wiring as best i could without redoing the whole harness. After that, everything seemed to be back to normal (so i thought)

Got a call about a week wont boot. scoreboard/marquee light up and it has a loud hum from what i can tell, is the speakers(which it was doing on occasion when i first took a look at the machine). Pinballs arent my expertise, but i am knowledgeable in electronics. First things come to mind, are a ground problem/ground loop, or power supply.

Anyone have any thoughts?


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Re: having issues with Data East!
« Reply #1 on: May 05, 2015, 03:36:29 pm »
Check the health of the +5V at the CPU board.   DATA EAST CPU Boards only need +5V to boot.

Was CN1 on the Power Supply board one of the burned connectors that were repaired?   

There is +5V and Ground Test Points on the CPU Board directly to the left of CN17 where the power enters the board. Upper left corner on board near the battery holder.

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