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missing sound issues. HELP

  • Thread starter Thread starter Friz
  • Start date Start date
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Friz

hey guys, still battling on with my first pin. Basically it was bought by my girlfriend for a birthday present supposedly fully working, when i got it it had a weak flipper, melted pop bumper coil, bad transistor, blown fuses, sticking solenoid, missing playfield parts and a few duff bulbs. Makes me abit mad these kinda people but not much i can do i guess.

finally got all that sorted plus full strip, polish, new balls and rubbers she plays great, but after watching a few vids on youtube it seems im missing some sound, it isn't noticeable at all when playing but when you compare mine to another its quite clear in missing afew sounds.

is this likely to be a sound chip that's gone faulty and are there any easy ways to diagnose a likely fault to give me a place to start looking into?

thanks all!
 
sorry guys, that was a drop off in my part. Its a Gottlieb Operation Thunder.
 
reseat A1P4 connector and check the pins,also on the reciprocol end on the soundboard,thats the comms line to the sound
 
Thanks, sorry to sound lame but are the rom chips easy to remove and are there any tips to do so?any tips welcome, my first pin so still learning all this stuff :-)
 
There are multiple possibilities. You have two sound boards, the second (to the right ) provides speech. Each has two eproms. Its possible that any eprom is corrupt, or needs reseatting. I've also seen occurences where the eproms have been inadvertently swapped over, causing all sorts of sound issues. Start by reseatting the roms in their sockets, and checking they are in the right locations.

The two board are connected by a VERY FRAGILE ribbon connector. Its easy to bend a pin under when re-installing. CArefully check that this cable if properly plugged in.
 
OK guys, had a look into it this morning, removed both boards, re-seated both eproms on both boards and re-seated the connecting ribbon cable and having a clean along the way. Results...nothing sadly. From looking at other videos on youtube and the internet, im positive that all the speech is present, so am i right in saying the speech board on the right should be ok?

Like I said, without watching other videos, you wouldn't have noticed there is anything wrong with the sound, it has all the speech and half of the sound mix it would seem which just results in a basic audio sample from what it should have.

I have taken a few pictures of the boards, there seems to have been a repair on one of them. Also I have taken a quick video showing sound in play, ignore te standard of play, I was recording and watching the screen and playing with one hand, very challenging. If someone who knows about these can take a quick look at my video and one off youtube to see the difference in audio, perhaps we can find out what the fault may be?

Any input welcome guys, really appreciate any help I can get.

Here's the video on youtube-
 

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Aren't the 2 eproms with windows on top supposed to have stickers over the windows to prevent them being erased? please ignore if I'm talking out of my ass.
 
I was about to say the same - the windows are supposed to be covered to stop Infra red (in all light) getting to the chips, and therefore stop the program being wiped.....

Lemme know which they are and if you need them re-doing and (dependant on type) if i can i'll get some in the post (probably boxing day)!!!
 
they do look like they had a sticker over them at one point (sticky residue) but am I not right in saying that both of them eproms are on the speech board so they must still be ok if the speech all works as it should???

Paul - if someone can confirm that one/some of the eproms has gone south, id be very interested in getting replacements, will pay you of cause, unless I can help you out in return with something.
 
If it's missing a few sounds, its likely (however would be good for someone else to confirm) that somethings been lost..... This would be one of the first places i'd look.

It's Christmas, and through no fault of your own (and a dodgy seller) you have a machine that is broken thanks to that crook - it's the least I can do to help. Fire me a conversation with your e-mail and i'll throw a couple in the post for you Gratis.....
 
Thank you Paul, that's very kind.

I know, I feel bad for my girlfriend mostly. She bought it in good faith an was very upset that it didn't work properly on my birthday. I have spent about 40 hours on it so far and about 150 quid on parts, tools etc and it actually plays and looks brilliant now, just the sound issue to go. She paid just over 400 for the machine she says which from what I can see, seemed like a good price and should be worth about 550-600ish for a good condition fully working one.
 
The dreaded ebay im afraid, I actually found the listing for it when searching google for help on the machine before I found this forum.

I have been so close to emailing the guy myself giving him a piece of my mind, but its not going to do any good so im just going to try forget it, finish fixing it up and enjoying playing on it, that's what its all about after all.
 
First off hit the test sound button (SW2) and see if you have the missing sounds in the test.
You can see it on the left of your picture http://www.pinballinfo.com/community/attachments/wp_20131223_001-jpg.4485/

Oh and check that the speakers are working and that it's not a case of sound only coming out of one side....

If you don't have sounds then you will most likely need new EPROM's.

If you have the sounds then the EPROM's are most likely to be fine. You'll need to double check those connectors that Andy was talking about.

Also earlier Gottlieb's (System 80's) use transistors on the driver board to drive the sound and it may be the same for system 3 game so it could be possible that there is another blown transistor that is causing the issue. The manual ought to say if any transistors are used for sound control. Then continuity check the path through connectors to the sound board. It is possible that it is a cracked or dry joint on one of them.
 
Although looking at that photo I think your test sound button is knackered (technical term). :eek:Typical... :rolleyes:
 
Ha, I was going to say, there isn't a button on it, can it be frigged? also can this just be pressed in attract mode and it un a sound test? I have run the sound test from the service menu and it produces no sound or tones at all yet the sound does work as you can see from the video.
 
Friz said:
Ha, I was going to say, there isn't a button on it, can it be frigged? also can this just be pressed in attract mode and it un a sound test? I have run the sound test from the service menu and it produces no sound or tones at all yet the sound does work as you can see from the video.
Click to expand...

Yes, it can be frigged but without a wiring diagram... :confused: That said looking at the photo again I would suggest a quick short between the leg on the bottom left of the switch with the leg on the top right (as you look at the switch in the photo with the SW2 upright) should do the trick.
 
Ok, looked at the wiring diagram and frigged the test switch (you were correct on the legs) but no sounds, So I guess its a case of new eproms. Am I best to just get a full set of 4 eproms or since the speech works on the machine, just get the sound roms on the main board and leave the aux board alone?
 
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