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Bravo!!! Bravo! 😀 RP8 is the culprit. Incomprehensible. I desoldered it and tested it outside the MPU; it's fine. I had tested it before, though. On the MPU, RP8 is allowing 5V to pass through. I'm very happy, very happy to see it working. It's a bit of an 80s nostalgia trip. I'm going to fine-tune the settings and run the test mode. I want to thank the contributors, Midibob, Andrew96, and Jimxxx, for their expertise; without which, I wouldn't have achieved this success. 🤝 Truly, hats off to you. Sincere thanks. I hope this thread will help repair other MPU3s. Gentlemen, thank you again.

Here are the new lamp holders 👍👍👍

Well done for sticking with it and getting it going, perhaps you should buy a few more machines now you have bought all the test equipment. 🤣 As previously said above thanks to Bob and Andrew for helping and saving another relic. Well, what to do now, this story is over, the TV is crap, perhaps i should pay some attention to my MPU1, perhaps...........

👍👍 team effort!

Good evening. No, don't jump in the water. Not now. I have a second machine to start. You thought you were out of the woods. Just kidding. With everything I've learned from you, I should be able to do something on my own. And if I can't, well, I'll come and ask. Thanks again, gentlemen.

I've enjoyed following this thread, and very pleased that another machine has been saved. All credit to Midibob and Andrew for generously sharing their knowledge and experience. What a great forum this is.

Merry Christmas

Sorry to interject here, i am enjoying following this thread and looking foward to seeing the machine run. As an outsider looking in sometimes you notice things that might help (or might not). 1. You say in an earlier post that you have tried a different reel deck (roller block) and the same fault still exists, this would mean that you have two reel decks with identical faults which is possible but unlikley. So can you confirm that the correct signals are leaving the reel deck (Bob or Andrew can talk you through where to test on that). If the above is not ok then it would seem the fault is with the reel deck. 2. If the above is ok then can you check the continuity of the green wiring loom between the reel deck and the mpu, also the green socket on the mpu and reel deck ( i can not see any mention of this being checked in previous posts). With the reel deck disconnected the mpu will see a fault and i imagine it goes through a sequence where it checks reel 1,2,3,4 and if there is no reel deck the first fault it will see and report is reel 1, again Bob or Andrew can confirm this. I will go away now and continue enjoying this thread. Jim Ps, as a relative newbie myself to the forum i would just like to say how good it is and the great people on here with the help and expertise they freely give, Well done everyone.👍

I managed to find a chap to redraw the damaged glass, looks good in the thread, just waiting on the actual decal to be printed and sent, he is also doing the button decals I'm missing so well happy link to thread https://www.ukvac.com/forum/threads/small-glass-art-reproduction.87391/

next up is some 80's old skool fun in the form of Naughty but Nice on Mpu3 Tech, Thanks goto @WonkySausage - images @wayfinder - layout used for lamping references @Pook - main reel symbols @pete_w - for the star and NN symbol Shortcuts are listed within the notes This machine accepts All coins including 1p's,2p's and 5p's not £2 coins as they weren't around when the machine was released Enjoy and HAPPY Gaming!!!! Naughty but Nice £3 Dx.zip

Another update. I scanned and uploaded some more pdf docs yesterday. I've also just tried photographing some schematics, but I'm not that happy with the results. I might see if I can get them scanned professionally. They range in size from A2 to A0 and beyond. The largest being 'Hot Dog', which measures 180 x 82 cm. 😲

New document added - Bell Fruit Microprocessor - TECH DOCS - The MPU Mecca Bell Fruit Microprocessor (Black Box) System outline, fault finding, etc.

Quick update. First document scanned and uploaded. Bell Fruit - Electromechanical Operation - TECH DOCS - The MPU Mecca More to follow.