That's so cool. What year was this? And why the Mac? I assume it was because of the speed of the 68k.

@@RetroHackShack Joined the project in 1987 - when the very expensive Gerber machines were still primarily used to image PCBs. This film imaging machine that I was part of development team for, used about three MC68K CPUs and rasterization was done with one of those, so by using the Mac we could port the rasterization code easily to the Mac and allow a user to preview a gerber file graphically on the screen (which black and white was adequate for) prior to printing it. The user would put a floppy disk of gerber files into the Mac and use its kiosk UI to select which file to print, etc. Could preview the gerber file, and preview its "tray" and customize it, etc. Probably one of the reasons I got the job is because at university a computer sci hacker buddy and I (I was in engineering dept) were showing off a TeX port to the Mac where we had a preview capability of TeX documents so all the academics using TeX could check what they were about to send to a department printer. This was before any commercial ports of TeX for the Mac started showing up. Professors were impressed as they all tend to write their papers and books using Donald Knuth's TeX (and LaTeX). Back to the PCB photo imaging device - the Mac Plus was mounted into the machine to where it was operated with a track pad (no keyboard). I wrote a new kiosk desktop UI that replaced the normal Mac desktop. Of interest is that what I came up with worked very much like the Windows 95 desktop UI that would come out 8 years later. I had something similar to the Start menu down in the bottom, left corner of the screen, which would click on to access hierarchical menus. Used fonts sized much larger and so forth. Very kiosky. So I worked at Microsoft when Windows 95 came out - it was satisfying to see that I had come up with similar take years prior, which Win 95 tended to be accepted as a very successful UI paradigm - seems like a lot of Windows users prefer its approach to this day. (that earlier company was hardware focused so there was never any thought about copyrighting or patenting the kiosk UI - they had hardware patents instead).

So cool. Thanks for sharing!

Yup, after you do a few of these you recognize the analog board clicking. But i also had one where the plug was completely fried and i actually had to get a new connector. Luckily that's all it was, sometimes people love to mess with the voltage settings on the board also when it doesn't work.

Yeah the speaker was shot. I replaced it we a spare. They are a weird ohms rating though. Like 36 ohms or something.

That would suck.

Another common fault is the fuse in the power cable. Always check blue wire has continuity. There's a 5amp fuse inline

I never realized that. That could cause a bit of confusion when troubleshooting for sure.

Thanks

Thanks!

Thanks!

Good to know. I often overlook the simplest solution or go down some rabbit hole.

Soldering to another soldering point is stronger than scraping and soldering to the trace. If there wasn't a solder point so close, your method would've been preferred.

Haha, not everyone has a KZfaq channel or wants to make videos... I know i don't, so all of my repairs are done incognito... It's nice that Aaron repaired it on camera for us.

Start a collectors group where you can trade and share good funds.

@Retro Hack Shack this is Netherlands. All macs come from old people rummaging through their attic. If you wanna check Dutch prices check marktplaats, euro is about a dollar