Leaderboard

Hi Brian, The first job is to cut that battery off, then I would take the card out and check the pins for any green acid, also the chip on the game card remove it carefully and check the socket and pins, If you have IPA clean any green stuff with IPA and a toothbrush, others will do it differently and use diluted vinegar but then you need to wash the vinegar off Cheers Ronnie

I have to say Matty, this is all very impressive 👌

Also if you have a test meter to read voltages worth checking you have 5 volts at that regulator on the heatsink beside the battery but I guess you might be ok as the led's are lit

Hi all stay in Scotland been into classic fruit machines for years and anything arcade,was a bit of an addict bitd but wouldn't change it for the world, I've owned a few machines through the years but space is always the issue can't keep them all. Got a non working machine at the moment so hopefully I get some help here in getting it back up and running. Cheers Brian

I don't think we have any rom variants, as i could only find v2.0 and v2.1 the rom can be altered to make it £3 jackpot, but sadly i can't get the jackpot tune to work after i have altered it. don't know if this is of any use? if so i will alter it later when i get home tonight . cheers

WOW! Topped out at £655 SNG is on my hotlist, but not at that price!

+1 yes, impressive. well done

Thanks fellas. Fingers crossed on getting something better soon. Ha a clever one i am not Bob, your fault finding and scope work are miles better than what I can do. I think anyone who understands schematics can easily build boards with no worries. Its just going through the pain barrier of learning how to build a schematic and learning to use the all the design software. Once you do that it all transfers over to the board layout-so you cant connect anything up incorrectly theres error check tools to stop you missing anything too. Im more of a moth hitting a light bulb until I crack it 😆

Lovely work matt, and I wont pretend to understand it all but I know how much work goes into these projects .👏

Hats off to you Matty, I've never sent a gerber to a PCB house as I'm always worried I've missed something so I leave it to the cleverer guys. To nail that one first time is a real achievement, well done.

Here here, very impressive. Being able to showcase your considerable skills in this way Matty should indeed help your CV and help at interviews. You can't keep a good man down, so you're bound to find a good position.

I got 5 manufactured in China... the manufacturing tabs down the sides of the board are for the component placing machine and snap off. Rather than ground traces ive made large ground planes to help reduce noise and reduced the length og power traces and kept them isolated on the back of the board. The Decoupling caps are now pretty much right on the +vcc pins. I will be keeping one unpopulated like this to show in interviews...

I built a schematic for the board first then laid it all out (more on this on the following board). With a 4 layer board i could have made it very compact or laid it out orientated totally differently but didnt think it would 'look' right. I decided on keeping it looking roughly the same with the same dimensions. I also wanted it to look as cool as possible. Here's a 3d render of the finished design-note the JPM rosette in place of the Varta mofo battery!

I selected all new components and prototyped them all running on original Card. Zn404 is engineered out in 3 components. All the replacement transistors selections are modern. There...is...alot of planning and datasheet work not shown in this picture!