Hi all, looking for some help with this solinoid board. It came out of a Bally Ground Shaker but I am pretty sure its not orginal. It does have STERN on it and some of whats in the manual isn't matching.What ver is this? From what I read if it has the 33k 2W R at R51 then its a J well then other things dont match. In the manual it has the HV fuse and this board doesn't have any. I pulled the R35 and on the J board R54 should be 8.2k 1/4W and this is a 1 W resistor. I pulled R35 and R 54 and both read 107K they look orginal and the pics are below. R35 should be 100K 1W and R 54 should be 8.2k 1/4W from what I am reading. For all of the boards I am looking at R 54 should be 8.2k 1/4 W .There is also a cap. connected to R52 that is just soldered to its leg. Any help to find out what this board is and the componets on it is greatly appreaicaled . I guess this board is somewhat of an odd ball something else is happening. Any other pics on info needed to help please let me know

Thanks in advance
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Thanks so much! This looks right I couldn't figure out what board I had with all of the different revisions but this schematic looks correct.

Thanks again!

Heres a picture of the model and rev. number. This was were the problem began as there is no rev. on it. I started to go with that R 51 was a 2w that it should be rev j, but I saw the r73-R75 listed that they shold be replaces also and couldn't find them. The first one above looks correct, I'll go over it more tonight. Do you know what Rev this board is?

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Ok I found out the Rev. On this. It was there all the time, just on the back of the board.

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Here's another pic of the left of the board it has the same 44-79 on it as the first board you posted. I'm not sure if it shows well but on the second to the left white tab it has Dec.27 1979 on it. This had been a unique adventure so far. Its always good to learn and help IMOP.

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Ed?

Your knowledge well exceeds mine here. This board is out of the machine and slowly being worked on, anything I can do let me know.

I thought it might have been the 44th week, but you never know. I do have another question. With this board there is no H fuse, I thought you said that Stern but the fuse on the back of a display board? Do you mean the individual displays? I want to add one before this goes back in the machine

Wow I didn't see all of these posts until now. I still need to look at the board and feel better putting a fuse in the HV circuit, at least it can't hurt anything. I want to thank everyone also for the help!

Changed the title of the thread, the main reason it was Bally was the machine.

I did look at the pic, yeah I need to hit that pin again. A couple of years ago I would never think I would be doing what I am now and I hope to continue to grow. My soldering is better than some and less than most but moving forward, and thanks for pointing that out too.