Hello everyone and please bear with me this is my first post and first machine. I have tried putting this off by reading a lot of posts but I need your help. Speaking of help if just a few more people in the world could be just half as helpful as everyone on this site, the world would be a lot better off. Anyway I have a ’79 or’80 Silverball Mania and a ’67 Williams “The Bootles”. I haven’t turned on the Bootles machine and spending my time on the SM. My goal was to get all the lights working and switches working and leaving the “patina” let’s say and trying to sell it but I can’t because it’s too erratic. It boots up about 3 out of 5 times. I either get the full (7) flashes on the MPU or just (2). When it works it works I only have (2) bulbs left to replace and (1) display is out but it has what I believe you call “hacks” in it. Please see attached pictures and yes with all that stuff it still works but I can’t live with that. My main question on this post is with the erratic behavior should I replace the rectifier board first or MPU? I have the manual and I have tried recording the readings on all (7) test points on the MPU but I’m not exactly sure what the reading for each should be. Sorry for such a lengthy post and I hope I got some of the terminology down.

PF

P.S. I don’t want to come off as putting a band aid on this unit, I’m just not sure how far to take the machine. I have a way of just going over the top with things when it comes to refurbishing them.

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Just as I thought an enormous amount of info and help. Thanks very much and I’ll get to work and report back. Wayout440 that link will keep me busy for sure
PF

Hello U10 on the MPU was very crusty all of the other connections look just fine. So i want to order this chip, (1) display (I moved one to a good location and the problem followed the display) I'm hoping all (5) are the same. I need to get the upgrade for the battery on the MPU and a new rectifier / transformer board. My main question here is do I use the Bally part numbers when ordering and hate to ask this but can you point me to a supplier. I have attached pictures as well. You guys and girls are the best. One more thing swillie mentioned NVRAM instead of the battery upgrade. Where can I buy this and what does it look like.

PF

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Sorry to keep bugging but i'm pretty green. I'm getting confused by what I see in the manual i have and the actual part numbers on some of the boards. All the boards match the manual but the MPU board. All i'm needing (for now) is the I.C. located on U10 (white dot on picture). This is what is printed on the top of it
F6820
7813
SINGAPORE

My MPU board has a PN of AS-2962 1119-E and the manual has AS-2518-35. I feel i should just ignore the manual or am I just getting to worked up on the part numbers in general? Is this just a 6820 / 6821 switch. Heck i'm sure it's not even called a switch. I'll get the lingo down

Once again thanks for all your help

PF

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I know I'm pretty "green" but I do understand that. Very funny stuff. Best laugh I got today!

Thanks PF

Hey can I get some help with 6 digit scoring display AS-2518-21 please. 5 of the 6 work great and when I move the bad one to a different location the problem stays with the display. This bad does nothing at all but all the voltages on it match the working ones. If I could purchase just one that would be orange like the others I would go that direction. Any info would be great

Thanks PF

Thanks Quench and BigAl. I replaced all (6) resistors still no success and I never had the orange glow either like you mentioned. Can I purchase another one and it match the others or still keep messing with this one? I have a complete list of vendors and everyone I have used so far has been awesome but if you know where I can get the "orange" display that would be great.

Thanks PF

Okay cleaned the board and swapped it around again still same. Never had the "glow" and all the TP measure the same as the good displays. Please don't make fun of my solder job. I'm guessing from your previous post you can't just buy (1) display that will match the rest. I would go for the plasma display like you mentioned on Ebay if I knew what to ask for.

Thanks Again PF

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