(Topic ID: 147748)

Power supply problems, Data east


By mysanders

3 years ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 3 years ago by markp99
  • Topic is favorited by 1 Pinsider

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#1 3 years ago

Hi!

I recently bought a semi broken ms frankenstein with no experience in either pinball repairing or electronics (have not used a multi meter before).

After some time familiarizing myself with the game and manual I've concluded that all 32 volt mechanisms are dead. This includes flashers and 32v coils. Flippers and other 50v coils work in diagnostics.

I've measured the voltage on the power supply board as seen on the attached image.
Since my experience on reading schematics and electronics in general i would be super grateful for some help on if I've measuring the right thing and what the next step should be?

Another thing that might be worth mentioning is that if i go to the diagnostic mode for flasher cycling test. My working 50v coils is triggered.
As i understand it, this has to do with my PPB L/R relay is "stuck" on one side. The coil side. Is this because it runs on the same power source as the 32v stuff?

All fuses have been taken out and checked with DMM.

Thanks!

PSB_(resized).PNG

#2 3 years ago

No one? Someone at least know the accepted values for the +12v and -12v outlet?

#3 3 years ago

9 times out of 10 on Data East power supplies it is bad connectors on the fuses. The connectors become loose or broken and will not give the full voltage. That is where your issue could be. Just check connectors and see if that is the issue. Hopefully this will help.

#4 3 years ago
Quoted from PinballT:

9 times out of 10 on Data East power supplies it is bad connectors on the fuses. The connectors become loose or broken and will not give the full voltage. That is where your issue could be. Just check connectors and see if that is the issue. Hopefully this will help.

Thanks for the reply!
Took the fuses out and put some pressure on each fuse holder. Unfortunately none of them seems to be bad, tight and firm.

#5 3 years ago

I replaced my DE JP power supply board. The HV leg was out. The Rottendog replacement is fine, but I do plan to attempt to rebuild the DE board.

At the time, I was more interested in confirming my DMD issue and getting the machine playing again than diagnosing the PS board. I'm in a good spot now to make the attempt.

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