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  1. Important Information

    1. The 68kMLA Forum Rules   (6228 visits to this link)

      To quote vintage Apple manuals: "Read Me First!"

  2. Community Connections

    1. General 68kMLA News & Stuff

      What's going down in the barracks.

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    2. Conquests

      Discuss your latest vintage Mac finds!

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    3. Trading Post

      Feel free to trade all of your Mac goodies here with all honest intentions. The website provider assumes NO liability, so buyer beware! Please see this topic for more information.

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  3. Projects & Hosted Forums

    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
      http://retrochallenge.org/

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    2. 68kMLA Wiki

      The creation and maintenance of the 68kMLA's information repository.
      http://68kmla.org/wiki/

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  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

      38346
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    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

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    3. 68k LC & Performa

      Ah, the consumer computers!

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    4. 68k PowerBook

      From the Portable to the 190cs.

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  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

      2285
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    2. PCI Power Mac & Performa

      The PPC comes of age and adopts the industry standard expansion slot.

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    3. G3/G4/G5 Power Mac, iMac & eMac

      From the Beige G3 to the quad-core G5, via various iMacs!

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    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

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  6. Everything Else…

    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

      6483
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    2. Newton

      The best PDA ever finally gets its own forum!

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    3. Software

      Includes system stuff, productivity, emulation, design, and games for pre-OS X Macs!

      15750
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    4. Hacks & Development

      Yes, it's back! Hardware hacks/modifications and software development for Mac OS.

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    5. Peripherals

      Anything you can hook up to your Mac or stuff into it as an interface!

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  • Posts

    • FrancescoDS
      IIsi power supply: triumph and tragedy

      By FrancescoDS · Posted

      That could be very helpful for diagnosing an old Mac, can you provide the pin-out you used?
    • bushok
      Apple SilenType printer won't move print roll

      By bushok · Posted

      Hi, I've just brought my Apple SilenType printer back to life yesterday, hooked up on my Apple II Europlus. Amazing it still prints.   There is just one problem: it won't move the print roll. So lines are printed on top of each other. I suspect a defective electric motor on the print roll rod.   Does anybody here know what the problem could be?
    • bibilit
      My powerbook 170 and the tunnel vision

      By bibilit · Posted

      IIRC the panel itself is still sold, don't remember but can be found online.   Wasn't cheap...
    • JDW
      SE/30 PDS Adapter Epic Blunder

      By JDW · Posted

      @joethezombie  Thank you for the suggestion!  The caps are all on the back of the DayStar 040 accelerator card as shown in this photo...     I first measured voltage across each capacitor to ensure there was no voltage (caps were indeed discharged) and then performed a Continuity check across each of the tantalum capacitors using my Fluke 8845A benchtop meter.  There were no shorts across any of the tantalum caps, which are the big black components in the photo above (light gray stripe marking the Positive side).   I then used my DER EE DE-5000 LCR meter to measure Capacitance and ESR, but the capacitance reading clearly shows that the caps are connected together at unknown points (I don't have a schematic) along with some of the tiny ceramic caps too, no doubt:   When measuring across either of the tantalum caps marked 10-16V (C46 & C28): 27uF, ESR=38Ω(@120Hz)   When measuring across any of the 4 tantalum caps marked 4.7-25 (C11, C29, C32, C49): 41uF, ESR=9Ω(@120Hz)    
    • joethezombie
      SE/30 PDS Adapter Epic Blunder

      By joethezombie · Posted

      Such heart-breaking to hear!  So sorry, and dang it!      You can try checking the tantalum caps on the back side for continuity.  They shouldn't be shorted.  So if you find one that conducts through, it's toasted and needs replacement.  I don't want to suggest it will fix the entire board, but I have now repaired two PDS cards which held up the rail, stopping the computer from startup, both due to shorted tantalum caps.  Ethernet cards in my case, but with some serious luck, maybe?
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