Every thing works great untill alot of games are played then i start to lose my speech. I have replaced my sound and speech card with brand new ones which made it better but after a dozen games or so the speech gets garbled. Would a faulty power supply cause this?
So the longer it heats up... that's when things go bad...
I can see why no one has helped you yet on this problem!
Q. Anything running hot?
-Aaron
Tried 2 different sets of new sound and speech roms. In self diagnostic it works fine even after it has played awhile. If i power down after it does this it will work for a game or two then start to garble words again so maybe it is not heat. Not sure how to check if anything is running hot. Put a small fan in the box and played like this and it still did it.
Good job trying to isolate the problem! I'd assume its not the boards or chips. How about the connectors to them. A cold solder joint can cause this!
-Aaron
Quoted from IowaPinballClub:Good job trying to isolate the problem! I'd assume its not the boards or chips. How about the connectors to them. A cold solder joint can cause this!
-Aaron
Probably is the solder joints.
You could always fork over a few bucks and send the boards out for repairs. They'll replace old parts etc too making the boards much more reliable.
So would you do all the boards or just start with one and which one? Not sure what that would cost compared to just buying new boards. I am contemplating resoldering myself but have never done it and am a little nervous on trying. I guess i could try and when i wreck the boards i could then buy new ones. I have my old speech and sound boards i could pratice on.
Well I usually wait until something occurs before sending out all boards..
here, you seem to be having problems with just your speech/sound board. I'd probably contact coin op cauldron and ask his advice. Clive does great work.
He may wanna look at the power board depending on your situation. I'd email him, give him your issues, and ask him which boards might be needing repair.
Also, make sure that your cpu is attached by all the screws to the backbox. Missing screws messes up the ground.. and can lead to strange problems.
Thanks for the replys. I will try the connections and make sure the boards are grounded. Blackbeard now that you mentioned screws to the backbox i think there is a few missing. I know there was a few stripped on the sound board but i replaced them. Maybe that is why the new sound board works better? I will take a look when i get home. This is my first pinball machine and i bought it for too much because i remember playing blackout when it was brand new in the arcades. I think my machine has been in a few arcades lol. It was pretty rough but cleaned up nice. I am learning as i go so any advice i will take.
It would be funny to find out that Slimmer just has several screws loose! lol! Seriously, I've NEVER seen that grounding problem!
-Aaron
I had a gorgar that had some controlled lights out that was remedied by not having my ground braid attached.
I've read a lot about the lack of screws in the boards and it causing problems.
Black beard you may be a genius unlike me. 1 screw missing on the cpu and 2 on the power supply. Played for over 1 hour tonight (just to try it out) lol, and the old girl talked to me the whole time. So far so good but friday will be the challange as the game will probily get played lots then. Thank you and Iowa for responding i will probily be back so i need all the help i can get.
Well that's promising news. Hopefully it was just a bad ground connection between the boards and the backbox.
Keep us posted. And if it reverts back to no sound again don't panic.
I've heard a lot of people say that the grounding isn't important, because there is always a ground wire. However, about 80% of the time somebody says they have garbled sound, it turns out to be missing screws.The board may have a ground wire, but all of the boards also have a perimiter ground plane that goes through the screws and mounts, and then into the metal paneling on the inside of the backbox.
Nearly every manufacturer has a similar scheme to their board grounding. The one that didn't? Gottlieb. Now, what does EVERY repair guide say is step 1 on old gottlieb machines? To build up an interconnected grounding network like everybody else had.
With Williams machines it shows up in the sound boards, particulary those that have speech boards mounted that have three op-amps in a chain that are amplifying any stray garbage signals.
-Hans
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Whitby, ON
Iowa City, IA
Screws... not so much.