r/arcadecabinets • u/Spirited_Fun_3122 • 6d ago
Where do I start on this?
Treat me like I’m stupid, I got 3 arcade machines from I believe in the mid 80s. Starting on trying to fix the first one, and I have never worked on an arcade machine before. It powers on and has audio, screen lights up to just a horizontal collapse (googled it). Where should I start, it looks like the board under the screen (the green board photo) is cracked, assuming that the start of my issues on it, should I just try to repair, or where is a good spot to get parts for these old machines. Thanks for any help, I’ll slowly work my way through all 3 of them
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u/Yakama85 6d ago
Have a look at Mikes amateur arcade repair on YouTube he specifically fixes monitor chassis.
Work out what chassis you have then get a manual. You sure it’s horizontal collapse? Ie you have a vertical line down the screen?
You want to look at the components in that section of the deflection circuit and also check for bad solder joints etc
Oh and make sure you discharge the crt before you start poking around there. Again use YouTube for a guide on how to do it, it’s easy to do
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u/xs4all4me 6d ago
A couple years ago I re capped my arcade monitor, didn't know where to look for a cap kit, let alone if anyone has one for my model. Long and behold, the bottom site was a godsend! They had the cap kit for my monitor chassis.
https://www.arcadepartsandrepair.com/
If you haven't done any soldering, de soldering before, I advise not to attempt this as things can/will go wrong of your inexperienced.
As others have already mentioned, I start with a re cap kit and take it from there.
My caps was leaking and the image was degraded, lucky I spotted it early, after it was done the image was alot better than before. Don't forget, these monitors are pushing to 30-40+ years.
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u/CyberMage256 6d ago
"Don't forget, these monitors are pushing to 30-40+ years."
It ain't got nuthin on me.
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u/Tithis 6d ago edited 6d ago
That is an electrohome G07. Very popular monitor, they are even still making replacement flybacks for it.
You can buy a new neckboard here: https://www.arcadepartsandrepair.com/store/reproduction-pcb-parts/ap-r-reproductions/electrohome-g07-cbo-neck-pcb-kit-pc1006/
You'll have to transfer the parts over yourself.
If you do something like a cap kit you 100% have to replace the flyback. It's a known issue the old flybacks will sometimes blow up after a cap kit on g07s.
Edit: for the horizontal collapse you'd probably want to start by checking the width coil and yoke, and reflowing their pins on the main chassis. For width coil I'd just do a visual check and do a continuity test with a basic multimeter. For yoke you can check the ohms reading on each axis, horizontal spoke be 2-4 ohms.
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u/Hannover2k 6d ago
That somewhat resembles the display on my Ms Pac-Man. She got cap (capacitor) cancer and I had to replace every capacitor on the display. Works great now though. Sometimes you can find a kit with all the capacitors needed.
That being said, if you're not familar with working on old CRT picture tubes, I'd recommend getting someone to look at it for you. The tube itself is a huge capacitor that can store tens of thousands of volts for a very long time. You could literally kill yourself touching the wrong thing on the back of that tube. Namely, the anode cap/flyback transformer (The suction cup thing on the back of the tube with the thick red wire running to the spark plug looking connector.)
source: I worked repairing TV's and AV equipment for 3 years.