(Topic ID: 247566)

System 1 Boot / Dip Issues

By MaxAsh

8 months ago

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  • Latest reply 8 months ago by MaxAsh
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#1 8 months ago

Hello All - I picked up a Gottlieb System 1 Genie recently, and have run into some issues. I'm going through the repair guides, but figured I would see what people thought as I wait for parts and such. When I power it on, I get a variety of results:

* Just GI, no boot

* It will boot after the 5 second delay as expected, displays go all zeroes, and I can credit up and play (though it acts strangely, more on that below)

* GI comes on, but a bunch of inserts are lit as well. The game won't boot and all the lights (including the inserts that shouldn't be on) stay lit

Sometimes it will boot fine a few times in a row, other times I have to turn it off and on a dozen or more times to get it to boot up. Some of the strange issues once it does boot include:

- The game will only take a maximum of "1" Credit

- Regardless of DIP switch settings, the game is always 5 ball, and I always have to trigger the coin door switch 5 times in order to get the 1 credit. It's as if the DIP switches do nothing at all

- The game normally plays great once it boots, but on rare occasion it will act oddly, like giving me a bunch of advance bonus triggers for a single target hit, racking up way too many points. This is not common, but happens now and then.

Some things I've done (NOTE: The boards were extremely clean)

* The original Data Sentry battery was there, but had not leaked. I removed it and installed a remote battery pack.

* I also replaced C1 on the power supply, so that's nice and new. I pulled all the connectors and cleaned the edge connectors on the boards (they were already really clean, but just in case).

I have not repinned all the conncetors yet, I needed to order the connectors, which arrive soon. In the mean time, anyone experience these odd behaviors? Suggestions? RAM maybe?


#3 8 months ago

Hmm, that's not encouraging. Hopefully I can figure it out!

Minor update to the above: I also did the ground modifications for the CPU and driver boards.

#4 8 months ago

Just found this on flippers.com's repair site for System 1:

Symptom: Game will register only one credit when coins are deposited and the book-keeping memory appears to be blanked.

Solution: Power supply capacitor C2 (220pf) limits high frequency noise on the +5VDC supply. If this capacitor opens, the bookkeeping functions will be inhibited.

I'll look into that in case it's related.

#6 8 months ago

Verified I have 5.04VDC and 12.12VDC on the MPU at the capacitors as expected, so the power incoming looks good.

#7 8 months ago

Started repinning connectors last night. I'm not confident that will help though. Does anyone have other suggestions on what might need to be looked at? Thanks

#9 8 months ago

The battery had not leaked at all, everything looked great. Already been replaced and I checked everything, it all tested fine... but I'll keep that in mind. I guess I could borrow a friends System 1 board and swap them to see if that helps perhaps?

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