(Topic ID: 253251)

NEED Help! Williams Type 1 Sound Board in System 7 Game

By canoncitypb

4 years ago


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Topic Stats

  • 15 posts
  • 6 Pinsiders participating
  • Latest reply 4 years ago by barakandl
  • Topic is favorited by 2 Pinsiders

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type 2 sound board (resized).jpg
Stellar Wars Sound (resized).jpg

#1 4 years ago

I am trying to use a Type 1 sound board in a System 7 Game. I am working on the jumper, but I'm having trouble with jumper 9. There is no place for jumper 9 on a type 1 sound board. The schematic shows (as far as I can tell - Looking at Stellar Wars Schematic) that Jumper 9 should connect pin 4 on IC9 with pin 16 on IC3 with Jumper 10.

However, on a type 2 schematic, it appears jumper 9 is connected completely differently. I'm not sure where to connect jumper 9

Can anyone help with this?

Stellar Wars Sound (resized).jpgStellar Wars Sound (resized).jpg

type 2 sound board (resized).jpgtype 2 sound board (resized).jpg

#2 4 years ago

What sound rom are you going to use in it? I don't think anything other than sound 1 works in a type 1 board, but I have never tried any other in it.

#3 4 years ago

I have a time fantasy rom.

#4 4 years ago

I don't think the two sound boards are compatible. I think reproduction sound boards are available again.

#5 4 years ago

Send a photo of the sound board.

#6 4 years ago
Quoted from Eric_S:

I don't think the two sound boards are compatible.

This is my fear too. Others were saying it could work. I'm not so sure. Probably going to sell the old and buy a new one.

thanks,

#7 4 years ago

For what it's worth, I've got one of each sound board type. Both need amplifier chips, which I have (and yet to install). As far as connectors go they're the same. They appear to use different sound chips but I'll review that too.

I'll post results in a few days.

#8 4 years ago
Quoted from pincoder:

I'll post results in a few days.

cool, thanks.

#9 4 years ago

it should work fine assuming you can mount it. Laser Ball(type 1 rectangle) uses the exact same SOUND2 rom as Blackout (type 2 square with speech). So ROM addressing should match.

The input circuitry at a glance differences shouldnt matter either. They stacked two 4069 together to get the same result of one 4050.

#10 4 years ago
Quoted from barakandl:

it should work fine assuming you can mount it.

Thanks for helping out. So my issue doesn't have anything to do with the number 9 jumper? I can't find it on the board.

#11 4 years ago

Looks like rectangle shape board J9 = W4 on square shape
and rectangle J10 = square W9

#12 4 years ago

Damn. The audio amplifier chips I have (TDA2030A) are not compatible with the TDA2002AV. I won't be able to give you an answer in a reasonable amount of time.

#13 4 years ago

ST Micro discontinued the tda2003 but Unisconic still makes them. I have been using them and they work fine. I don't think any western distributors carry Unisconic stuff tho. You can get them at LCSC. DHL shipping is pretty fast to the USA.

https://lcsc.com/product-detail/Audio-Power-OpAmps_Unisonic-Tech-TDA2003L-TB5-T_C83050.html

There are bootleg ST Micro TDA2003 all over eBay and Ali. These seem to work but I read on some forum that they may not have the short circuit protection like originals should.

#14 4 years ago

Good to know, thanks! I found and ordered from a place that has the NTE1288. Spec sheet numbers are identical but I havent found any confirmations that they work. They're crazy on shipping costs outside of the USA so I had them sent to a friend in Texas. He'll forward them to me. Should be here in about a week or so. Have you heard of the NTE1288 before?

#15 4 years ago
Quoted from pincoder:

Good to know, thanks! I found and ordered from a place that has the NTE1288. Spec sheet numbers are identical but I havent found any confirmations that they work. They're crazy on shipping costs outside of the USA so I had them sent to a friend in Texas. He'll forward them to me. Should be here in about a week or so. Have you heard of the NTE1288 before?

NTE1288 looks like a re branding of TDA2003 so it is the same part. Will work fine.

Always goofy that NTE used there own numbering system.

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