Linolium
Member
So I just got a Gottlieb SMB pinball machine (System 3). The game plays fine, with the usual burnt out light here and there, but there is a fairly noticeable lack of sound. I tried new sound roms (A1, A2, and one other I can't remember off the top of my head), but they didn't fix the problem.
The voice-clips and sound-effects do work under the following conditions:
1) When the machine is turned on I hear 2 tones.
2) When you become super, you hear "I'm Super Now!"... and nothing afterwards.
3) When you get a starman Peach says "You're invisible now!" then the sound returns for a few mins EXCEPT for the background music- just voice and sound fx. But this only lasts for a min or so before going silent again.
Music never works.
Where should I look to fix this problem? I know it would be either the Sound board or the Aux Sound board, but I don't know which one would cause this problem. I would prefer to fix the board(s) rather then spend $100+ on a new board or two.
Because the sound does work at times I assume fuses F10 and F11 are fine as well as the audio amps, but I could be wrong...
Also I've been referring to http://www.pinrepair.com/sys3/index.htm as much as I can, but there really isn't much about sound troubleshooting there.
UPDATE: I tested grounds, the voltage pot on the mini powersupply, and cable connections and they're good but still no sound. The sound does seem to randomly work at times. I heard the attract voice say "Why don't you-a try this-a game?" as well as some other random sound during gameplay. I'm begining to think the sound rom I don't have a spare for is bad (DROM?)
Peace,
-Linolium
The voice-clips and sound-effects do work under the following conditions:
1) When the machine is turned on I hear 2 tones.
2) When you become super, you hear "I'm Super Now!"... and nothing afterwards.
3) When you get a starman Peach says "You're invisible now!" then the sound returns for a few mins EXCEPT for the background music- just voice and sound fx. But this only lasts for a min or so before going silent again.
Music never works.
Where should I look to fix this problem? I know it would be either the Sound board or the Aux Sound board, but I don't know which one would cause this problem. I would prefer to fix the board(s) rather then spend $100+ on a new board or two.
Because the sound does work at times I assume fuses F10 and F11 are fine as well as the audio amps, but I could be wrong...
Also I've been referring to http://www.pinrepair.com/sys3/index.htm as much as I can, but there really isn't much about sound troubleshooting there.
UPDATE: I tested grounds, the voltage pot on the mini powersupply, and cable connections and they're good but still no sound. The sound does seem to randomly work at times. I heard the attract voice say "Why don't you-a try this-a game?" as well as some other random sound during gameplay. I'm begining to think the sound rom I don't have a spare for is bad (DROM?)
Peace,
-Linolium
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