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Arcade Collecting > Restorations & repair

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chopperthedog:
@Tighe, nice score. I'm setting sail on the moody blues cruise tomorrow (band I work for is part of it). I'll be back March 2 and can provide any info you need.

good day.

Tighe:

--- Quote from: chopperthedog on February 25, 2016, 10:54:19 pm ---@Tighe, nice score. I'm setting sail on the moody blues cruise tomorrow (band I work for is part of it). I'll be back March 2 and can provide any info you need.

good day.

--- End quote ---
Awesome thanks!

chopperthedog:

--- Quote from: Tighe on February 25, 2016, 11:38:16 pm ---Awesome thanks!

--- End quote ---
Any updates?

Continued from my other thread with my dead Extra Bases: So at first I thought it was a dead switching power supply and did some initial tests and all was good with supply. Something in the astrocade board cage was shutting down the power supply instantly. I was able to narrow it down to an issue with a short somewhere in the 12v circuit. After some further testing it was narrowed down specifically to the ram card. Started poking around and found that the tantalum capacitor at C2 was shorted. I was able to borrow one from another ram card and the Extra Bases was working again!!!

After that little hurdle, it got me thinking back to the Space Zap cocktail that did the same thing during my initial tests back in December. Checked the cap on the 12v rail of both of the ram cards and discovered one of those were shorted as well.

I swapped out C2 with one borrowed from another board and figured what the hell, lets see what the dead Space Zap board cage does after finding the shorted cap.

So now I've got a working Space Zap board cage. Full steam ahead with cleaning and fixing the cocktail table now.

good day.

Tighe:
Space Zap looks cool with that overlay and bezel.

TopJimmyCooks:
Chopper, the Pinball Ninja (Clay Harrell) has a really good guide to a holistic approach for working on EM pinballs. http://www.pinrepair.com/em/index.htm The principals on the em games you have are identical. In pins the constantly running motor "brain" is called the score motor and it's in the lower cabinet usually. you already have a great working knowledge but there are some gem's in his process. for instance, the diagnostic process being heavily visual since you can see every part of the circuit- disconnected wires, bent switch leaves, etc. He has also figured out the best way to restore and lube stepper units, etc. I never had any help on EM repairs, I learned it all from him. His blog site is good too - requires a donation to his museum in Michigan.

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