finkmac

finkmac

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NORTHERN TELECOM 37 From sega bass fishing
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  • finkmac
    Testing polarizer alignments

    1781211213831.png

    Rear polarizer wet-applied with RapidTac, testing with loose polarizer


    1781211244154.png

    1781211001243.png


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    finkmac
    I like this site and love all of you people equally even if the feeling is not always mutual.
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    discatte
    discatte
    (=ↀωↀ=) <3
    Byrd
    Byrd
    So you love us but are not in love with us? We can accept this.

    Signed, the people of 68KMLA (bots too)
    ClassicGuyPhilly
    ClassicGuyPhilly
    People all over the Board (everybody)
    Join hands (join)
    Start a love train, love train!
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    finkmac
    look ma, no wires
    1768440792079.png

    1768440840297.png
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    Reactions: ry755, SophieRose, slomacuser and 5 others
    Snial
    Snial
    Sigh. I once had a PowerBook 100. Bought it for ≈£320 in spring/summer 1996. Loved it. I had an external FD for it. The 40MB HD did start to die after a few years, but I was able to repartition it as a 29MB drive.
    obsolete
    obsolete
    Take it to a coffee shop and bask in the envy of all who witness you
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    finkmac
    finkmac
    powerbook 💻 2400c tip of the week 🤓
    during startup, just after the "welcome to mac" screen… the powerbook will attempt to initialize the pc card cage, and eject any inserted cards.
    if this fails for whatever reason, the computer will instantly shut down.
    • Thanks
    Reactions: croissantking
    finkmac
    finkmac
    if the mechanism or circuitry is iffy (in particular, the eject/sense mechanism is a bit fragile)... it can look like something more serious is wrong.

    also... never insert a memory card in the upper slot and a wlan card in the lower slot... and then eject the memory card.
    croissantking
    croissantking
    Classic PowerBook 2400c quirk 💻 — right after “Welcome to Macintosh” 🍏, it tries to initialize the PC Card cage. If that fails, it instantly shuts down ⚡. Try booting with empty slots, cleaning contacts ✨, or reseating/disconnecting the cage. Pure mid-’90s Apple charm 😅.
    croissantking
    croissantking
    To be clear, I was doing my own hand-crafted take on AI.
    finkmac
    after much messing about I mostly succeeded in performing a polarizer replacement on this 2400c panel

    1752123338251.png\

    the soap method @jmacz mentioned was indispensable... highly advise removing the backlight first though...not perfect, but sure beats a crackled smelly vinegar panel
    finkmac
    1741562765394.png

    certified powerbook duo moment. all those big caps were leaking their guts all over the board. clearly someone turned it on without recapping...
    jmacz
    jmacz
    Ouch! At least there's a bit of the pads left. Hope it didn't eat any of the traces.
    J
    joshc
    Hopefully it cleans up alright
    A
    aladds
    Thankfully a lot of those capacitors are in parallel with each other, so there are options for connecting to different pads, or just using bigger capacitors
    finkmac
    1731526327503.png
    280c display capacitors if anyone is curious. so many stupid little cans.

    1731527458297.png

    i circled them to make it easier to read


    1x 10uf 16v
    2x 22uf 10v
    3x 100uf 6v
    6x 47uf 6v
    1x 33uf 10v
    1x 47uf 16v
    1x 10uf 25v

    Attachments

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    3lectr1cPPC
    3lectr1cPPC
    Thank you :)
    J
    joshc
    Measurements - height and width of each cap might be good for next time - can be useful for caps with tigher physical tolerances such as in display assemblies.
    3lectr1cPPC
    3lectr1cPPC
    I always just get the smallest caps that I can when recapping LCDs in order to give myself the most room to work. I don't think it would even be possible for me to solder in caps at the original dimensions that they used.
    finkmac
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    check your PowerBook Duo trackballz... earlier revs seem have a radial lytic cap that leaks


    1723654017880.png
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    3lectr1cPPC
    3lectr1cPPC
    Updating my Duo cap reference right now - would it be ok if I used your photo on MacDat? Would credit you of course.
    finkmac
    finkmac
    go right ahead (y)
    3lectr1cPPC
    3lectr1cPPC
    Thank you!
    finkmac
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    I HATE HITACHI (apple singapore) POWER SUPPLIES!!!! I HATE THEM!!! HATE!!! meanwell got me covered 🙌
    🙌🙌
    finkmac
    1721332142163.png

    disassembled a 2400c trackpad. yuck! crumbly foam! and some mystery stickyness. i suppose this explains why some 2400c have floppy trackbuttons
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