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(Topic ID: 24704)

Data East speaker noise - ideas for a cure

By roc-noc

11 years ago


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#39 11 years ago
 
RYE

Pimp77

Pinside member

20y 92,650 6,275 78

Quoted from Matt_Rasmussen:

Well, recapped the entire sound board and have a new XPIN power supply and the buzz is still there, and possibly worse. It was the same with the new caps and the old supply, with the new supply it might be a bit worse.
I've tested the grounds and they show continuity from the head to the body etc.
Could it be the display? There is an issue with the display, I'm just curious if that could be inducing the noise in the audio.

I thought the same thing and replaced my display. Buzz is still there, although I did have SOME DMD noise that is now gone. The speaker hum is annoyingly there though still.

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#68 11 years ago
 
RYE

Pimp77

Pinside member

20y 92,650 6,275 78

Quoted from Crash:

Someone just posted this, claims a new DMD solved his problem. But it's a Williams game, not Data East.
http://pinside.com/pinball/forum/topic/audio-feedback-hum-went-away-after-installing-nos-dmd-wcs94-wpc

It's NOT the DMD! I replaced mine and still have the hum...unplug the DMD, still have the hum.

2 weeks later
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#125 11 years ago
 
RYE

Pimp77

Pinside member

20y 92,650 6,275 78

Quoted from ChadH:

Just wanted to follow up with what I ended up doing to fix my Data East Star Wars sound. Last I posted, I said I was going to replace the caps on my power supply board. I pulled the power supply off and took one look at it and realized that it was not worth putting new caps on it. The board had been serviced (badly) over the years and had really bad solder jobs done on it. The circuit board was also bubbling and lifting really badly. It would have been a waste to replace caps on such a chewed up board.
So instead, I ordered a new Rottendog power supply.
I after I put the Rottendog in, the constant background hum (60 Hz?) was reduced quite a bit. But the buzzing coming from the dancing matrix lights and the DMD in attract mode was still there. In fact, this part sounded louder relative to the now reduced background hum.
So I unscrewed the sound board again and let it float free. This time it worked! It reduced the attract mode buzzing noises by about 90%! So I got some nylon screws (8-32) and nylon washers from Home Depot and used those to screw the sound board back in.
As far as I am concerned, my sound problems are resolved. Is it completely quiet now? No. But is it WAY better? Yes!

Thanks...I'll try and removing the screws to see if that helps. If so, Home Depot time for some nylon screws!

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#127 11 years ago
 
RYE

Pimp77

Pinside member

20y 92,650 6,275 78

Quoted from castlesteve:

Also newer DMDs don't buzz like what you're hearing. I had some perfect working ones that buzzed and new ones are silent

If the display is buzzing it's about to die...time for a new one! The Cherry ones are terrible IMO...they buzz the worst.

1 week later
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#150 11 years ago
 
RYE

Pimp77

Pinside member

20y 92,650 6,275 78

Quoted from viperrwk:

The problem now is the buzzing Cherry display.

Every Cherry display I've ever had buzzed horribly. Get rid of it.

Thanks for the update...I'll try the same on my JP.

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