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Had to look it up - apparently cap V's are 6.3 because it accounts for the 25% safety margin over 5V: https://www.eevblog.com/forum/beginners/capacitors-why-6-3v/

Documentation somewhere a long time ago... '22' is the capacitance in µF, '6' is the voltage (for some reason always 6.3), the 'S' is the series (I think can be either A or S), then the last line is manufacturer codes I think? Not relevant to the values though.

22µF, 6.3V

Hm. It sounds possibly like a grounding issue, or something is tripping ground detection... which diode did you replace with the IN4004?

Yeah I saw the offset pin, but what I can't see is what it's connected to. From one of the other images, all I see is pins 1 and 3 having traces, which make sense given this is mains input (there's only going to be GND and 120V)... but I could be wrong about the other two. The Meanwell has a...

Oooooh - I see, I think that's the mains input connector for your PSU... it looks to me like that connector only uses pins one and three but I can't see the whole thing. I can't imagine what that offset pin is for - is it connected to anything?

For the +5V/+12V output? I don't know if it has a name, but any 4-position assembly with this connector should work: https://www.digikey.com/en/products/detail/molex/0022013047/26435 Edit: here's the datasheet for the Meanwell: https://www.meanwellusa.com/upload/pdf/PD-25/PD-25-spec.pdf

Hm. Does that mean the modem connector could be used for an internal wifi serial modem emulator?

Whoa - sounds like you were connecting straight to mains voltages. The board is only supposed to receive +5V and GND, so hopefully everything is ok... sounds like it is. In this case, I believe you should be tapping +5V and GND from the logic board, which should be easy. I have a couple of...

Agree re: System 6. Also worth consideration: https://androda.work/product/macintosh-portable-7-megabyte-ram-card/

Either that or remove the battery when you're not using it (and also remove the 9V). It really depends on how long you're keeping the thing on the shelf. I don't use mine a whole lot (once every few weeks), so I don't have a 9V in it, and I don't put the battery in it until I use it. I don't...

SAM's should have what you need: https://archive.org/details/Sams_Computer_Facts_Apple_IIc/page/n43/mode/2up

Wow, this is impressive, adventurous stuff. Thanks for leading the charge and sharing your experience. More research to be done...

I also would like to know... if you find out, please update us!

For trace repair, I just use copper strand wire salvaged from an old power cord... it's just straight-up copper wire very fine gauge (couldn't say exactly), works well enough for those small little bridging repairs where you're recreating the trace or reconnecting a via. But for longer bodges, I...

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That's my understanding as well - not so much that the higher amperage damages chips, but that over time Q16 will burn itself open allowing 6V+ and worse (i.e. 7.8V) through to the PMGR etc. instead of the regulated 5.2V... but how exactly the mosfet fails in this circumstance is unclear to me.

One my 'favourite' moments from Computer Chronicles is when the guy from Apple is demonstrating this very feature, forgets to put the battery cover back on, and the machine shuts off. Then he can't turn it back on again to continue the demo because the power manager needs to be reset... he...

LOL yeah sorry I guess there's still debate on this in the sense there's still debate about anthropogenic climate change... the actual experts overwhelmingly agree, but you still find folks out there who don't. At least I still see lots of comments online (not here) that using a 1xx adapter is...