(Topic ID: 32593)

Playmatic experts?

By bonedoc

10 years ago


Topic Heartbeat

Topic Stats

  • 13 posts
  • 5 Pinsiders participating
  • Latest reply 7 years ago by logicsound
  • No one calls this topic a favorite

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#1 10 years ago

I just got my hands on a very, very nice Playmatic Space Gambler. I have everything working great, but one thing...the sound.

It seemed to produce some C3PO Star Wars sounds. But, it seems a little jumbled up and then would just be a constant high pitched tone, like an alarm. So, I have rebuilt the entire Bells Module, minus doing the precision cap and resistors. I also put in a new D flip flop on the driver board....no sounds at all now. Very odd.

Anyone have experience on working on these? Is there a way to test the bells module by stimulating the inputs?

#2 10 years ago

The only info I found on Playmatic was on Flippers.be
I own an EM but never ventured into the SS side - hope this helps some ?

http://www.flippers.be/playmatic.html

#3 10 years ago

Hey guys, I was in the process of rebuilding the driver board, and some of the chips I used were TTL and were supposed to be CMOS. So, I will try some new chips and get back. The only thing I have not replaced are the transistors. They are pretty obscure. Things like BC106A...

#4 10 years ago

Are you using a cross reference book in your search?
The sales man at the parts store had one - I think they may let you buy last years if you ask

#5 10 years ago

They used their computer cross reference and I have google searched to oblivion and some of these parts were scarce in the 70s

#6 10 years ago
Quoted from bonedoc:

Things like BC106A...

For the BC106A, its probably a small signal NPN or PNP. If you can take one out, run the diode check on it to determine whether it is NPN or PNP, then you could use a PN2222 (NPN) or PN2907 (PNP) as a substitute.

#7 10 years ago

Ok, I think part of my problem is that the manual calls for 74c175 quad d flip flops and I used a 74als175...which is the low power schottky type. I am ordering the correct ones, and hope I am lucky.

The manual sucks bad. It calls for 3 LM324, and there are none in the circuit. It also asks for 1 of the above flip flops, and there are 4.

2 years later
#8 7 years ago

Did you ever get this working? I just got a space gambler and have no sound at all, no whine or anything. Any ideas?

#9 7 years ago
Quoted from logicsound:

Did you ever get this working? I just got a space gambler and have no sound at all, no whine or anything. Any ideas?

Look for blown fuse for sound voltage(s)...
If fuses are good, look for missing sound voltages on the sound board itself. Usually -5,+5, or +10... test points?
Replace any electrolytic caps on the sound board?
Look for cold solder joints at the connector(s) on the sound board?
Look for a dirty or "open" sound control potentiometer on board or in the game. (A wire may have just fallen off)
Clean (and adjust) all the "jones plugs" in the game with some fine grit sand paper. Make sure they have a tight fit.

Here's the page that you probably want to look at:
http://www.flippers.be/playmatic/bt-tbell.html

These are all wild guesses, but your most likely culprits are listed first. Report findings back here please.

#10 7 years ago

Thanks! getting off work in about 2 hours and will do your suggestions!!

#11 7 years ago

So my findings are if I unplug the plugs that go from decoder board to leds on backglass the sound starts working!! crazy!! not sure what that means, check out my new post for more details, would really appreciate any help you can give.

#12 7 years ago
Quoted from logicsound:

So my findings are if I unplug the plugs that go from decoder board to leds on backglass the sound starts working!! crazy!! not sure what that means, check out my new post for more details, would really appreciate any help you can give.

That means your sound board works. Did you look into cleaning the jones plugs?

#13 7 years ago

yea all the jones plugs are cleaned now. still same result

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