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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.

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.

👍👍 team effort!

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.