I still haven't gotten around to sorting out the grounds on my SF2, (I know I know!) and as the machine has started behaving oddly I'm planning to do as such.

Now I reckon I know the answers I'll get but what's everyone's preferred method?
I assume crimping to the transformer but being in the UK I'm unsure of sizes,don't have many places to buy and don't want to order online only for the sizes to be wrong.

I see that Marvin's old guide notes that he soldered the bundles together as an alternative. I have an iron already and generally prefer solder than crimping.
Is this satisfactory to most? What's your opinion?

The only issue I can see is down the road the board may lose connection to the chassis one way or another, rendering it moot.

Cheers for any input.

#2 9 years ago

DJP

Chitownpinball

Pinside member

Aurora, IL

11y 102K 7,313 5

Acting up? System 3 is usually solid...whats the issues?

#3 9 years ago

TAK

ThatsaKicker

Inactive member

Old Colwyn

10y 41,650 354 1

Quoted from Chitownpinball:
Acting up? System 3 is usually solid...whats the issues?

Heh well I'm sure as heck hoping it's ground causing it, else it's probably previous acid damage

Just some oddities. A couple of times rollovers didn't register, test mode froze at the initial screen the other day and turning it on and off didn't resolve initially. And a few more little things I can't remember.

#4 9 years ago

FAZ

pinball_faz

Pinside member

Chicago Burbs, IL

13y 99,300 2,735 5 32

Try this: http://www.flippers.com/gottlieb_ground_cures.html

This differs a bit from Clay's technique, which is to strip all the ground wires and solder them all together...keeping the old connectors in place (which is the core of the issue).

John's technique is what I used on my SYS3 (Stargate).

Best of luck!
faz

#5 9 years ago

TAK

ThatsaKicker

Inactive member

Old Colwyn

10y 41,650 354 1

Quoted from pinball_faz:
Try this: http://www.flippers.com/gottlieb_ground_cures.html
This differs a bit from Clay's technique, which is to strip all the ground wires and solder them all together...keeping the old connectors in place (which is the core of the issue).
John's technique is what I used on my SYS3 (Stargate).
Best of luck!
faz

Yea that's kind of my preference atm. Did it seem to 'hold up' well/were you worried the circuit board itself would eventually lose connection to the plate?

Seems like a daft topic I know but just got the general gist that most prefer crimped connections.

#6 9 years ago

FAZ

pinball_faz

Pinside member

Chicago Burbs, IL

13y 99,300 2,735 5 32

Clay's approach depends upon at least one of the connectors having contact. That said, the odds are really good that one will work. However, it's still depending upon a poor connector which is why you do the mod in the first place.

I've not even thought about my SG's ground mod because there's nothing that fail.

My 2¢.
faz

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