Hi Canea,

I wouldn't suspect the ROMs.
With system 80 games, connectors are always suspect. Sound signals emanate from one of the two connectors on the left side of the driver board. Note that it sits sideways in the head so in that case, the bottom connectors.

The edge connectors on the sound board could also be the culprit. A single miscommunication bit in the interface could cause the behavior you note.

Reseat those edge connectors a few times. If they don't fit snugly, repinning them, although a pain, is a good idea and will rule out connectors.

If the issue persists and you want to test your sound board, I'd be happy to throw it into my Genesis.

--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact
http://webpages.charter.net/chibler/Pinball/index.htm
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Ed has both the pins and the connectors.
Pins: https://www.greatplainselectronics.com/products.asp?cat=80, scroll down to find 08-52-0072
Connector: https://www.greatplainselectronics.com/products.asp?cat=77, find the right size. The size must be exact. Unlike .156 header pin housings, Gottlieb edge connector housings can't be trimmed.

You can reuse the current connector. It's a PITA but I've done it. You have to extract the IDC pin which is the tough part. Those buggers just tear up your hands.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

Did you ever try a different sound board?

Maybe try playing a game while you have a multimeter hooked up to watch voltage

download (resized).jpg

Gents, I have a different sound issue. When the sound is working, it suits the gameplay. It will either be on or off. It resets and works when the next player starts their play, or if a single player starts another ball. Will it be a ground issue like this? I saw the ground mod on a TNT video, and I get how you connect all the wires in a bundle and pigtail off. But I don't know how to connect the single line pigtail to the ground box.

Anyhow, suggestions for either the intermittent music issue, or how to do the ground mod are both appreciated.

Just picked up the Genesis yesterday.

Check out the ground mod section of the PinWiki for System 80 games.

http://www.PinWiki.com - The new place for pinball repair info

--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info

Use the threded holes that the old square ground plug screwed onto the box, bundle the wires together in 3s or 4 at a time and use a crimp on terminal with an eyelet (after i crimp them together i solder them also) then just screw them to side of transformer box. To the best of my knowledge those wires are only for coils and solenoids on the playfield and have nothing to do with sound.

Thanks Chris and crlush. I need to get this mod done right away. Seems my problem grew today. Machine totally heated up, and one of the 4ohm heat sinks (think that is what they are - ceramic like round thing) just fell right off because it was so hot. Couldn't even pick it up. That is how I knew there was an issue because it just clunked onto the bottom of the box when it fell off. You can see the one missing between the short and long round ones. It severed itself right on the edge of itself, not the wire from the solder. Doubt a ground causes that, but maybe. A short?

The ball release gate would not open after it let the ball go to start a game. ie first ball ok, after that, no go, it would stay locked. And no music. Repeated the same issue every time I reset game. Then on the what I believe is the driver board - board on bottom left side, the 3 rounded things on the board - pic attached, where also super hot, as well as one under the playfield.

This could have happened from the move, or the clean up, vaccuming out the box gently, etc.

Any guidance is appreciated. Game is unplugged and "out of order". See I feel like an arcade now.

Mark

20170115_131939 (resized).jpg

20170115_162255 (resized).jpg

The round part that heated up and fell into the cab is a current limiting resistor. I believe those are in the flash lamp circuit.

The can transistor(s) on the driver board hearing up indicates a short. You have your work cut out for you.

Don't let any flasher or coil remain energized for more than about 5 seconds as it will melt either the coil itself or flashers will melt whatever they are adjacent to, like ramps.

Do the ground mods.
Inspect ever coil. Ensure the plungers move freely into the coil sleeve. Measure coil resistance. Make sure none are under about 2 ohms.
Inspect the connectors.
With System 80, connectors are always an issue
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info

Thank you very much. I figure this is so I can learn everything about electrical troubleshooting. Appreciate all your help points.

Chris, Pinwiki is an amazing site. Thank you!!