Arcade Repair Tips - Checking A Classic Power Supply 

Fantastic video. I learned a ton!

Another really informative arcade repair video! Thanks again for your dedication and keep them coming.

Excellent video. I remember that older video where you talked about the back of that transformer putting out DC. I never have had to work on one without a switching power supply, so it's good to know that extra board is needed for the older games, or that they convert to DC on the game board themselves. Great work!

Bought a Ms. Pacman cocktail table last week and the innards are in rough shape...but this video helped me determine my power supply and isolation transformers are actually working, believe it or not (fuses are just disentegrated, but that's a cheap and easy fix). Also great info about measuring voltage on the board. You saved me a lot of research; thanks!

Thank you for your video.

WANDERFUL N HELPFFUL TIPS

Thanks for the good video. I frequently tack solder test point loops (DigiKey, etc.) on just behind key solder pads on edge board connectors. Big wide edge board connectors, especially on ancient boards, are easy to mess up when you pull them off and push then back on. I tend to use oscilloscope test leads, so having loops to grab keeps my hands free. You can even make these little loops out of 24 AWG bare copper. A really good channel to learn about PSUs is EEVBlog. Switching PSUs are pulse width modulated devices controlled by oscillators. That is what the "switching" means. The other standard PSU is called a linear power supply. Those are the ones that are driven by things like the old 7805/7905, LM317/LM339, etc. semiconductors. Learn a little of this stuff and it makes it easy for a EE type like me to help out if you don't have an arcade guy around. The whole reason I am hanging out here on this channel is to learn how arcade people think and talk about their art. Maybe I can work on a game when I get done watching. Believe me, 35 years as a design electrical engineer (EE) does not prepare you for arcade work. You guys with games could help bridge the gap by checking out how we EE's talk about our world.

Thank you :)

Great video,thankfully i have only ever had one psu problem with my cabinets and that was with my German Vanguard cabaret,the graphics broke down into jail bars after running for 15 minutes so i suspected the voltage was being pulled down slowly over time.It turns out it was the main 10000uf 63V capacitor on the psu board.

Hey thanks! This was a big help in getting my Ms Pacman running again.

@xxsurcentralxx First off, sorry to hear about your issue. Hope you weren't too hard on your dog! As for your question, your MK1 should be wired by the JAMMA standard. We have a video on the JAMMA standard that you might check out. A lot of times when you see a grouping of black wires, they are ground wires. It's hard to tell for sure without seeing the damage. We also answered your question on episode 24 of our podcast. Visit our website if you would like to hear more of our thoughts. Thanks

the 5 volt potentiometer on the power supply must be adjusted cheking from the arcade board too? or from the terminals of the power supply? what you recommend me? thanks a lot for your videos!

Thanks guys. Very helpful video. One small request: when you’re pointing things out on the board, we can’t see anything in the wide shot. Please show us a close up of the board when you can. Otherwise, great information. Thank you!

@Kombat723 You can get a complete sound board along with all the cables from The Real Bob Roberts website. If you go to his parts page and do a search for MK and you should find what you're looking for. We also answered your question on episode 22 of our podcast. Please visit our website if you would like to hear more of our thoughts on your question. Thanks.

Hi, in the peter chou power supply, what the H dial does?

might need s this not sure yet can you hlep me. I have this same boared . An a while back my hard drive went out .. so i gotten 3 anotehr one.Now when i turn on the game nothing happens its showing the number 8 on the LED lights on the bored. I notice when i take the hard drive belt off it spins up. When i plug it back up it does not spin.. do you have idea wt could be the problem sir? Do you think it could be a bad ship or a power supply problem..

Hi , I just bought a dedicated MK1 machine runs fine but has no power harness running to the sound board. It doesn't have the bracket for the sound pot or test menu switch. My question is where would you find a power cable and how would you go about getting a sound pot bracket with all the service switches? Do you have any for sale?

should I have my meter on dc or ac when testing my peter chou?

With my powersupply "peter chou" set at 5v tested on the ommeter should i be getting -5v on that socket? Im getting 4.57 when i test the negative 5v. is this power supply bad my mk2 board wont work its red led is lit up but wont boot up or even check roms, but if i hook up my mk1 board it works fine help please THANKS!

So My I want to replace a Old school power supply with a newer one. The Game is Shuffle Board and has the second board (with the giant heat sinks). May i request a video step by step replacing a Old School power supply with a newer one. PLEASE.

hi i have the other power the one in your side, and i have no idea how to plug in all the cables,,

Does most of the arcade uses the ceramic fuses?

What is a AR board? I have one in my sky shark that I think is bad. old game If I cant find one then is there a solution? Sorry I am not knowledgeable regarding this, Im trying to get it working again.. Thank you!

I have a ranger mission cabinet. The fan inside the power supply stopped spinning. That’s probably not good for the monitor or the board. Things will get hot I assume The game won’t coin up anymore. I put in a new cherry switch and game still won’t coin up. Any suggestions?

why not just swap in a modern power supply ?

Ms Pac isn't Jamma, so this video is kind of all over the place. But "old skool" covers it i guess.