While working on and experimenting with my new found pinball hobby, trying to figure out what each part is doing on my boards and why, I was thinking.........This might be another dumb question for some of you guys! I'm trying to teach myself and was wondering why you can use a higher voltage rated cap. As an example, instead of a 35 volt 100 mf a higher voltage 50volt is Ok. I read a lot of articles saying it's fine to use higher voltage rated caps, but I haven't been able to find out why? What does it change? (if anything) where is the % limit, how big is too big? If there is no difference ,then why all the different voltages? Why, not just 100 volt or higher for everything? Can someone lay this out for me in half dummy terms? Or point me in a direction of something that explains this.

Also, why not just use 1% resistors on everything? Is it a waste, would it help? Was it originally a cost issue in the assembly line, and the 5%, 10% were cheaper. Or is there some other reason that you would actually want a 5% 0r 10%?

I know this stuff might be basic, but these questions might help someone else that is trying to learn and might be curious. I can somewhat read a schematic and can swap parts, but I want to know why, and what that part is doing.

Again, I don't know enough....to know!

Sry, if these are newbie repeat questions!

Thank you! The caps question was bothering me! lol That helps! For some reason I was thinking they would keep charging. I guess If I think of it like a battery, it's only going to charge to what is pushed to it? Which makes sense, can't make more than what you have, basically!

Ok, so some of this stuff doesn't have to be exact to work, Would tighter percentages/tolerances on the sound boards help to take out buzzing or clean up the sound? Is there anything I can modify there? This is what actually started me thinking on some of this. I have buzzing in both of my pins. Not loud, and probably wouldn't be noticed anywhere else. But for home use it's annoying sometimes. And of course.....I'm not the type of person that can just leave things alone! I have to take everything apart and Mess with it!

That's what I was wondering, if it was a cost thing. And now that time has passed, some of the parts could be changed for better quality parts fairly cheap. Not that it would matter much, just my way of learning I guess. If I mess with it I remember a lot more, than if I just read it somewhere.

I did have Z rated tires once! They didn't make the car go any faster. The computer shut it down!(limited it) Never did find the wire to cut to get past that! Jkg!! I understand what you were getting at!

Thank you! I'll check the link out!

You know, Now that you mention it, when I was turning the volume inside the one machine, it sounded scratchy. I think I have some in my "experiment" pile of parts. I'll have to see if I have one the same size and try it. I ordered parts for the cpu,to replace corroded SRC's and other parts in that area, so I'll have to wait till I get that back together to try it. The corrosion was bad enough I could taste it when I was messing with the board. Kind of like when you change and clean the terminals on a car battery.

The other machine makes the noise with the display changes(Rescue 911) But...........That is "her game"(she thinks)! And she plays it every night. So, I have to leave that one alone until I get the other one completed!

I just went and looked at the display, and it is a Cherry.

Were these speaker covers originally glass? I'm guessing they broke when the top glass was lifted out with the molding, causing the bottom panel to fall? That is the only thing I can think of why there are so many missing. I found an older post from you with the link to the replacements(thanks by the way, I looked everywhere until I found that post). And your not Joking about shipping being a little pricey! They wanted more to ship it than what the part cost! So, I'll have to wait a little while to order that.

I guessed wrong .. lol I do notice a lot of them missing. I wonder where they go? Maybe they were picked at and broken when they were on routes? Who knows! It's one of the mysteries of pinball!