(Topic ID: 203831)

Williams Fish Tales makes bouncing sound on start up.


By Scrimmbo

1 year ago



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  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by Scrimmbo
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#1 1 year ago

Hey everyone. I've browsed this site pretty regularly when I need some pinball repair tips, but I finally signed up to ask you all a question.

I have a Fish Tales pinball that is giving me a little trouble. When I flip the power switch the game makes a bouncing sort of sound something like a "bum bum bum bum" that gets more rapid and finally stops and the game starts as normal. Here in the shop we have great electricity and it goes through this routine once. However, out on the route lots of our accounts have not so nice electricity, and when the game is in one of these locations it can go through this routine 4 or 5 times before it will start as normal (the lights come on for a second and go back out).

My thought was it was probably filter caps on the driver board, so I changed all those and ended up changing all of the rectifiers on the board, trying to chase down the problem. At this point I'm wondering where to start looking next.

#2 1 year ago

You've got a low 5 volts, and your Thermistors are old. What you're hearing is the normal boot-up sound. If it's doing it several times in a row, it means the voltage watchdog has caught the voltage at below 4.85 volts. WPC is notorious for low 5v stuff. You need to rebuild the 5v section. Usually just changing BR1 and BR2 on the power board does it for me, but the whole kit and kaboodle from plug on up needs to be looked at. When you get that multiple attempts to boot kind of thing, it also indicates that your thermistor is on the way out. It needs to "warm up" to start working. There's a board you can buy at kahr.us that should fix the problem, if you don't like soldering.

Edit: Pinwiki.com has a whole section on 5v problems on their site. It'll help tell you what to look at. Where ya operating out of, by the by?

#3 1 year ago

Hey, thanks for the info! I did change both of those bridges, and I hooked the game up through a variac to try and simulate the slightly lower voltage of some of our locations, although I'm not sure if that would actually tell me much. I will check out the thermistors and the 5v circuit like you said.

I thought I filled out the info on my profile, but maybe didn't save it. I work for an operator here in Fond Du Lac, Wisconsin. We do all manner of amusement stuff, and sadly don't have that many pinballs any more. I think we have maybe 15-20 on route, most of which are white star sega and stern stuff. So I do everything in my power to keep our good older Williams and Bally tables working!

Thanks again for the info. I'll let you know if I have any luck!

#4 1 year ago
Quoted from CadillacMusic:

You've got a low 5 volts, and your Thermistors are old. What you're hearing is the normal boot-up sound. If it's doing it several times in a row, it means the voltage watchdog has caught the voltage at below 4.85 volts. WPC is notorious for low 5v stuff.

Hey there, I'm having a hard time ID'ing the thermistors, I guess when I think of thermistors I think of black discs, but after looking it up I guess they come in several different packages. Any idea where they are, or how they are labelled on the schematic?

#5 1 year ago
Quoted from Scrimmbo:

Hey there, I'm having a hard time ID'ing the thermistors, I guess when I think of thermistors I think of black discs, but after looking it up I guess they come in several different packages. Any idea where they are, or how they are labelled on the schematic?

Look in the power box in the cabinet...heres my Fish Tales...

20171124_211536 (resized).jpg

#6 1 year ago

ohhhh haha, gotcha. I was thinking they were on the driver board.

Thanks a bunch.

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