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  1. M

    Reverse Engineering the Macintosh LC Logicboard

    My LCIII seems to be okay on the plastic side of things… Maybe some batches had different sources for molding? Or maybe it's just the storage conditions (my bedroom) that suits it better? The only thing I recall is one of the angled tabs retaining the logic board that was a bit lose, and if I...
  2. M

    WIP: SprintLayout (.lay6) import in OpenBoardView for logic board diagnostic/repair

    Ok, trying to get the outline isn't as easy as I thought, of course it's not just a nice polygon; but a discontinuous set of polylines + arcs out of order…
  3. M

    WIP: SprintLayout (.lay6) import in OpenBoardView for logic board diagnostic/repair

    Well in theory you can also do it in KiCAD, though it may be less streamlined and might complain about missing netlist. This Hackaday article mentions some way to do it in KiCAD: I suppose some plugin could make this even simpler. It should also be possible to write KiCAD importer, although...
  4. M

    WIP: SprintLayout (.lay6) import in OpenBoardView for logic board diagnostic/repair

    I recently helped reverse-engineering the Teboview (tvw) format to add support for it in OpenBoardView / FlexBV (Paul Daniels' closed fork which adds some features like both sides at once). Those are heavily used by people like Louis Rossmann to repair laptops, by making it possible to browse...
  5. M

    Eagle vs. KiCad

    KiCAD made a lot of effort on their standard library in the recent years, it used to not be very stable before. Also, the documentation mentions importing Eagle footprints, but I never tested this.
  6. M

    LC III - No video, no sound, and weird schematic

    Yes from the schematics R5, R6, R7 and R8 have a common trace between them.
  7. M

    LC III - No video, no sound, and weird schematic

    I don't have time this week-end (I opened it but had to close it back to make room), I'll have a look next week.
  8. M

    Pin Matrix for PPC ZIF modules?

    Well LTT managed to do that with broken CPU pins…
  9. M

    Pin Matrix for PPC ZIF modules?

    Depending on the dimensions you might be able to replace that with things like these SMD pin headers maybe…
  10. M

    Schematics for Delta PSU

    Great, so I can put mine back in one piece 🙃 Someday I should recap it maybe, and check this resistor which I think is quite burnt. I noticed someone posted the cap values elsewhere here. At some point it'd be great to get scans of the PCBs and pictures to RE the schematics for further repairs…
  11. M

    Schematics for Delta PSU

    The stuff around the Triac on the first board (the one with the fuse) is odd. I don't think it's PFC, those weren't a thing back them. It could be overvoltage protection, some use a zener to control a thyristor.
  12. M

    Schematics for Delta PSU

    You didn't specify which zener… but anyway they all seem to have whatever reference they have on the side facing the board so not very readable anyway. I just noticed on mine R2 has its heatshrink tube is quite burnt.
  13. M

    Schematics for Delta PSU

    Ah, my Quadra 650 has the same PSU, let's crack it open and see.
  14. M

    Schematics for Delta PSU

    There should be a reference on the zener, and datasheet for them detailing which reference corresponds to which voltage.
  15. M

    Schematics for Delta PSU

    Quite unlikely you'll find this. However, most switching power supplies follow common designs, and if you look up the ICs reference you might find reference designs in the datasheet or application notes that are close to it. As for zener diodes, you can usually test them in-circuit with the...
  16. M

    The Macintosh Portrait Display Adapter, Or, I Suck at Making Cables

    Cool! Now for the cable, you could have reused some thicker VGA cable. And the connect shells can be painted, I did this for my AAUI cable.
  17. M

    Reverse Engineering the Macintosh LC III Logicboard

    Do you recall who that was? I fount this attempt at REing their format but it's not finished. I was looking into adding import for OpenBoardView…
  18. M

    Reverse Engineering the Macintosh LC III Logicboard

    Do you plan on publishing the files someday? Along with some netlist RE it would be useful in OpenBoardView for troubleshooting existing boards…
  19. M

    Open Source 68-Pin 512kb VRAM

    Ok so I wasted a month on a new laptop to end up sending it back because it had so many issues… I just tried with the online conversion tool but the result misses all the ground planes. Not so surprising since it gave many warnings during the conversion: Warning: unsupported shape RECT...
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