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Sort of a side note just incase it helps out. I am terrible with Jong configurations and have no idea to the answer of the original question. I did however build one of buffis mahjong adapters and a Mahjong keyboard for personal use. As the MOQ on the pcbs was 5 I still have 3 left if this helps...

3.3 GETTING POWERED Not much to see here just replaced the old IEC with a 10A all in one including EMI filter. Also added a warning to make sure I cover myself for liability. The problem with the old one was not so much the front but what was behind it.

3.2 JUST LIKE US CHINA RELATIONS AT THE MOMENT "MY WIRE IS THICKER THAN YOURS" There are a few issues on the power supply of the chandy. Most need to be totally rewired if you don't want your MF roof on fire. This one had a roughly wired meanwell supplying 5v @1A with no 12v and no -5v. That...

Trace it back, is the input voltage correct? My bet would be a bad load capacitor on the input side but it could be one of many things.

Yeah, I think it makes the throw feel more solid or harder to knock and the return quicker, but this could all be in my head, who knows, a lot of these things are really subtle but definitely do contribute to an overall feel.

X.XX ON THE DOWN LOW Cab is in for paint this weekend. Despite the fact we are good mates, I can't tell you anything about the guy painting it, except for he is Italian, has a business just across the road from work, and his business seems to be closed lots. You work it out. He is also one of...

3.1 STICK IT 2 EM Only one type if stick to put in a shmups cab. Sanwa LX with the original spring changed out for a 2lbs and a 1mm oversized stainless steel actuator. Similar with the buttons Seimitsu screw ins as they are more robust and not as touchy. Nothing worse than dropping an...

There seems to be 2 on the market. One 25-27" and 1 29". They are fairly versatile but some of that flexibility can only be achieved by component changes. Pretty easy to work on and a pretty straightforward circuit for someone who comes from building tube amps.

It ends up looking like this... The big power cap goes from a cheap chinese 470uf 200v to a 560uf 250v Nishicon long life. Looking at the rectifier diodes I am not interested in playing the game of what blows first, your 2A fuse or your 2A diodes. Out they come, holes ever so slightly drilled...

Starting at the power side there is quite a bit that needs replacing in on of these to get them to function semi reliably. It starts looking like this.

3.0 PICTURE PERFECT. So the cab is preped ready for paint with a few other bits and bobs ordered. However we have this chassis monitor problem. It looks to me like a 29" TV has been used to replace a broken or lost monitor. I gave the PO 2 options, an rgb mod of the existing TV chassis with no...

2.6 SCAVENGER I want through the pile of junk that came out of the cab. I noticed that it was running a pi 3b. I had a case printed up so quick that I didn't even have time to change filiment and installed the latest WIPI netboot on the 32gb SanDisk that was kindly left in it Now I just have...

2.5 SANDY BEACH First off.... Shelf posts all fixed. No glue, just pressure fit. Second off.... if you are not spending at least a day sanding and preparing for paint...you are not doing it right. Not much to say here just sand that MF baby. 80 grit wet and dry with water, one done 120, then...

Just waiting on a few people to confirm their order. I have a few pcbs left if anyone else wants carts or blank pcbs. Besides that it looks like I am done hope you all enjoy them. Here a few I made up in slik red cases for another private sale.

@GC8TECH knows these better than I do. I would think that a logic level MOSFET is attached to the old charging circuit, probably a safety thing for battery charging.

Thinking done. I think this will work.

Umm this shelf feels a little unstable... I wonder why? Man this MF really had problems with getting screw tension right. I'll be kind I think he really did think this thing was a blast city. For everyone else, if all the screws are there you have to put hardly any tension on them at all, even...

I don't think the pins are long enough to be bent and I have not found any flat battery holders with 3 pins either. I actually designed it upright to mimic the original battery but it does stick up a tiny bit further than the original. I was thinking of doing a flat one as well as one for the...

I actually use a high voltage discharge tool which I built after seeing this video. His circuit diagram is pretty cool and I trusted it more than aliexpress of fleabay. View: https://youtu.be/pNkEchLQWDU?si=u98g-gSd2KRC87c2 Most of this guys videos are great I used to do it in a similar way...

EPROMS came in and 3 carts for @coldasijs ready to ship.