(Topic ID: 24704)

Data East speaker noise - ideas for a cure


By roc-noc

7 years ago



Topic Stats

  • 507 posts
  • 136 Pinsiders participating
  • Latest reply 5 days ago by jimgravina
  • Topic is favorited by 129 Pinsiders

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There are 507 posts in this topic. You are on page 11 of 11.
#501 26 days ago
Quoted from jorro:

Once i cut the right speaker wires of the hum was gone.

The right speaker is like a piezo speaker and is designed to put out the higher frequencies. I noticed the same thing when covering or unplugging the right.

Some have posted that when they replace the speakers, the hum is improved. I assume that is because the replacements don't have the same high frequency capability.

#502 26 days ago

Well the $150 PSU I had worked...so I guess the cheap one I tried was too shitty. Luckily I had an extra ATX extension cable I cut up so I don't need to damage the actual connector on the PSU.

I ended up just using wire nuts to splice into the switch and screwed the ground into the cabinet ground braid. After doing this I of course noticed there was an unused connector coming out of the switch that went to the back of the cabinet...oh well. Either way the hum is totally gone. I have a cheaper power supply on the way, once I get that I'll use some L brackets to screw it to the cabinet.

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#503 26 days ago

ATX PSUs may have minimum current draw requirements.

1 week later
#504 15 days ago

Chiming back in here...

I replaced all 25 capacitors on the sound board (Data East Back to the Future) and it did not solve the buzz/hum.

It didn’t make it any worse or better, exactly the same. I had also replaced all the caps on the power board also a few weeks ago.

At this point I probably gotta go with the extra power supply solution, unless there has a major breakthrough since my last post?

Jim

#505 14 days ago

Based on my research from this thread...this power supply should do the job yes?

ebay.com link

Thanks!
Jim

1 week later
#506 8 days ago

I got a power supply that was suggested earlier in this thread, wired it all in and it works, now more buzz!

Now, there still is the “attract mode” buzz that happens when the lights flicker on and off...I wasn’t expecting this to fix that and I don’t think we have a solution yet, but the lower frequency buzz is gone.

I still have a slight buzz form the transformer itself...it’s just no longer filtering through the speakers.

Anyone know what to do about a buzzing transformer?!

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#507 5 days ago
Quoted from Pinballhorse:

I would like to thank all who posted on this topic of Data East noise solutions. As a new member i find this forum a great asset! I just purchased a Data East Time Machine. The background hum was taking the fun right out of playing this awesome game. After reading all 441 posts on this thread I decided the most sensible fix for me was just adding a small extra power supply dedicated to the sound board. I mounted it right next to the bottom speaker as it was easy to wire to the switched 120 v from the machine (as shown in the photo). From there a nice wire up to the soundboard with my +5 +12 and -12 then into an oem connector and problem solved. 20 dollars worth of parts and 1 hour install start to finish. The parts were obtained on Ebay and the description and part numbers are as follows.
Mean Well RT-50B PWR SPLY,SW ENCL,50W,+5/4A,+12/2A,-12/.5A, UL/CUL/TUV/CE 14.95
CT156F22-6-CA PANDUIT PANCON MAS-CON THROUGH CONNECTOR 300V AC/DC 22AWG 4.95
Thanks again for everyones help
[quoted image]

Hello! I ended super getting this power supply. I had one question for you...did you hook your ground wire to the COM port of the power supply, which then goes to the ground pin on the sound board? Just wondering why you didn’t put it on the actual ground port that is labeled with the ground symbol...kinda new to this field so forgive me if this is a stupid question.

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There are 507 posts in this topic. You are on page 11 of 11.

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