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@olliec420 Parts. 8 bucks would be a little too cheap for a complete mod... those boards will be BIG. Instructions/files will be free once I finish it. Hopefully I'll have a new schematic ready next week.

Nice work. Now do one for the RAM slots that’ll cover the entire length ;)

Definitely following this one. I too had started listing the custom chips on the SE/Pluses, but you took a step further and that's impressive work! Keep it up @Kai Robinson It'd be particularly useful to reverse engineer that RTC chip. The ATTiny85 seems like a great place to start.  The SE/30...

Thanks @mietek 22uF, 16V. Casing is probably C or D. 

When you're dealing with tantalum caps, only replace the ones that are damaged. The rest of them (for now at least) are ok.  I don't remember on top of my head what value that cap was and my 950 is currently buried under a pile of stuff... Maybe someone else can help? I think your PSU is what...

@mietek sure thing... and that makes 10! Now, unless someone wants to buy 5 more, I'll stop the "pre-order" here.  @Ton I feel your pain. It was pretty much the same thing for me but instead of RAM that was with the DOS card. And the damn PSU also tried to kill me (to be honest it was probably...

Thanks NJ! I'll report back once I get the Quadra up and running... but am I really the only one with this issue?

I had my Houdini II installed in a Q950 (before the thing blew up) and although the card was recognized by 8.1 (I remember checking with a program called Slots that it was correctly identified), the control panel simply would not start (if I double clicked it, it would simply reset the Mac...

I've had to revise the fan controller bit again... Big thanks to the guys over at eevblog.com for their help. Although this still hasn't been 100% approved/verified, it's looking pretty good now! We've mostly redesigned the LED controller circuit         - Now we won't be frying op amps...

Hallo Bunsen :) Thanks a lot for pointing out what it's called. The documentation will look a lot more professional now. Zur Info, diese Dinge heißt 'ne Durchführungstülle. En Français (I'm a french dude living in Germany after all...), ça s'appelle un oeillet ou bien un passe-fil... And...

Proposed Comparator/Controller circuit: I had to take into account the different 2/3-pin fan control strategies (namely, PWM and Modulated ground) for the ATX PSU fan connector because since this isn't standardized, it has to work with them all. That's C1, R5-8 (on the right) and Op Amp #3...

Can you post a picture of your card? Most SE/30 Pivots can only do greyscale. The color cards are pretty scarce.    You should also check your ColorSync profile. Maybe it’s set to some odd greyscale monitor... My IIsi Pivot works on a wide range of monitors, including TVs with VGA inputs...

And the checks are done! Phew! I am still not particularly proud of my fan circuitry. I am currently thinking about upgrading my dumb controller to at least PWM. But I am also tempted to go with a full-blown temperature controlled circuit that reuses the PSU's built-in controller... but for...

I remember there being a part on the CRT neck board that caused this when it failed. Don't remember which one though...

New pictures! Final checks are still in progress... but the new AC board design is now much "safer". 

Hey there. You guessed the steps right  :smiley: . I'll come up with a more detailed guide later but that's pretty much it.  At the moment I'm investigating the DC board clearances and I still have a few other small questions/issues before I can give JLCPCB the go ahead. I've never sent...

Give it a (small) whack on the left side. There are solder joints on the analog board (more specifically on the CRT coil connector) that often go bad. The display may briefly come back to life.

Apparently the voltage drop and added resistance are really negligible. This version of the board will replace the older design. 

I have created a new version of the AC board with the filter at the input (instead of at the output). Any comments or remarks would be well appreciated.  I'm concerned about the track lengths... The Neutral track (Net- (FL1-Pad2) ) is 13cm (5 inches) long. May be too much... What do you think?

I'm afraid no one really knows. It doesn't seem to have anything to do with the name of place it was manufactured. I've seen Mac Classics with no text, with the actual production date (aka Chassis date) or with this "Serial Number" + letter text... The sticker on my Quadra 950 (made June '92)...