Leaderboard

A massive thanks to Ed off here for taking a look at the rom program code to unblock the gamble on this great old mpu3 clubber .the three single bars dropped in on reeld 1,2&4 and it held so obviously I held them and the fourth bar dropped in .couldn't believe it but was over joyed .here is a clip of that jackpot .it stopped paying £6 short due to the tube sensor .

Ha ha no way a very rare sight indeed !! well done 👍🏻 very very clever

The 2sd669a is also obsolete, and you don't have a 2sd669A to compare one to, but this place here does have genuine ones, yes it is a bit pricey, but it depends if you want a cheap and nasty counterfeit to blow more up! I got a original transistor from them as the genuine one shown above, but at least yours will be cheaper than mine as mine cost £25 in total for just the one transistor. If you do decide to repair the unit, make sure caps and the other transistors are to spec so the new transistor doesn't blow up right away again! https://fixpart.co.uk/product/utc-2sd669a-transistor

Hey all. I thought it was time for a long overdue update on this. I've been busy with work and family so have been limited with time to work on it. After looking at all the IC's under the microscope, pretty much all were showing some serious corrosion on the legs, along with some of the caps too. I eneded up replacing all caps and socketing all the IC's on the motherboard. The only ones i didn't replace were the RAM and the CPU itself. I also replaced all the transistors for the three motors and numerous ones for the lights as well, along with sorting out the sound issues by replacing the trimmer pot that controls it. After doing all that, i still had a problem with the Number 2 stepper motor binding up! Luckily i managed to find a replacement on ebay though, fitted it and it all worked ok. As you can see I still have a few lights to sort out, along with some cosmetic repairs to the cabinet. Annoying the stepper motor for reel 1 has now started to bind up in a similar way to the one I replaced on reel 2! The chances of finding another replacement being fairly low, I decided to strip the one that I had removed previously. I know a lot of people say they shouldn't be opened as they are difficult to assemble again, but I've managed to get it open and stripped it down pretty easily. I removed both the front and rear bearings and soaked them overnight in some oil in the hope that some of it would get inside. Unfortunately they seem pretty well sealed, and any effect is only very short-term. However I've managed to source some new ones, so as soon as they turn up i will fit them and rebuild the motor. I'll film it as I go and will post a video up here of it.