Gottlieb sys1

[dealers choice]

I have a question. I just picked up a Cleopatra. it has led globes fitted. Im doing earth mods to the boards. whenever you hit a target etc. the score flickers. should I earth mod the displays as well?
Bren

[dealers choice]

While looking over this old girl I found this stamp. thanks Marty Machine lol

[Strangeways]

The displays don't need to be grounded if the power supply has a ground mod.

Do all displays flicker, or just the one ?

What are these LED displays ? I've never heard of them 

[Boots]

I have a question. I just picked up a Cleopatra. it has led globes fitted. Im doing earth mods to the boards. whenever you hit a target etc. the score flickers. should I earth mod the displays as well?
Bren

Have you done the power supply ground mod?
From memory there are two grounds on the power supply, I have read somewhere where the two grounds should be tied together to stop weird stuff like that happening.

[dealers choice]

Sorry Nino, not led displays lol. led playfield and back box lights. maybe I worded it wrong lol. all scores flicker, not just one
No earth mods done yet Chris, thats tomorrows job and thanks for the info guys. it has a new power supply but not earth modded yet.
overall im very hapy with this machine for its age.

[Sinbad79]

Mine does this too, just assumed it was normal??

[pinnies4me]

Fun game, I like the System 1's.

As for sorting problems with them to a greater degree System 80, it is always best to do the ground mods before worrying about anything else as this cures a lot of issues and can avoid chasing unnecessary problems.

[dealers choice]

It could be normal, i dont know. Only Gottlieb.ive dealt with before was an 80b ( heaps more boards in that)  it plays very well, but eartb mod is first up.
 Also Chris. There are 2 earths on the power supply

[Retropin]

Take everything to true ground ( mains) including backbox sheeting etc and you shouldn't have anymore problems. IMO the Clay mods don't go far enough because you can never have too much ground, only not enough

[Boots]

Take everything to true ground ( mains) including backbox sheeting etc and you shouldn't have anymore problems. IMO the Clay mods don't go far enough because you can never have too much ground, only not enough

I agree, I don't think Clay's guides have anything about the two separate grounds on the power supply.
I had an issue with mine so I rebuilt it and grounded everything to common, hasn't missed a beat yet.

also don't forget your board connectors, these often get overlooked but are well worth doing.

[dealers choice]

Cool, thanks Gav. so your saing thak it to where your mains lead is soldered to the emi filter
and Chris, are you saying to run extra earth mods from edge connectors as well as from the boards?
Or are you sugerting to repin it? Im was only going to tidy up a few things and run earth from boards as he doesnnt want to spend heaps on it.

[Retropin]

Cool, thanks Gav. so your saing thak it to where your mains lead is soldered to the emi filter
and Chris, are you saying to run extra earth mods from edge connectors as well as from the boards?
Or are you sugerting to repin it? Im was only going to tidy up a few things and run earth from boards as he doesnnt want to spend heaps on it.

Yeh.. wherever your mains earth comes in.. this should go to the earth distribution solder board in the cabinet base. Make sure this is all good and solid with less then 1 Ohm resistance to all parts of the machine and reference all  board ground to this

[Boots]

Cool, thanks Gav. so your saing thak it to where your mains lead is soldered to the emi filter
and Chris, are you saying to run extra earth mods from edge connectors as well as from the boards?
Or are you sugerting to repin it? Im was only going to tidy up a few things and run earth from boards as he doesnnt want to spend heaps on it.

I mean Clay's ground mods + the p/s ground mod and a separate job is to re-pin the connectors especially the lower ones on the MPU

[dealers choice]

Grrr. thats what I thaught you meant (repinning)he wont be wanting that yet. i dont know why but these wires blue and black dont go anywhere and what is the part no to re pin that. conector with the wires. hanging off it?

[dealers choice]

Ok earth mods done. only took 2 pics. thank you guys for your advice. not much left to do on her.
Bren