Jump to content

Forums

  1. Important Information

    1. The 68kMLA Forum Rules   (10381 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.

      3979
      posts
    2. Conquests

      Discuss your latest vintage Mac finds!

      40016
      posts
    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.

      54326
      posts
  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/

      1490
      posts
    2. 68kMLA Wiki

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

      549
      posts
  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

      47264
      posts
    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!

      13568
      posts
    3. 68k LC & Performa

      Ah, the consumer computers!

      8235
      posts
    4. 68k PowerBook

      From the Portable to the 190cs.

      10247
      posts
  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

      2715
      posts
    2. PCI Power Mac & Performa

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

      6003
      posts
    3. G3/G4/G5 Power Mac, iMac & eMac

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

      13810
      posts
    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

      9104
      posts
  6. Everything Else…

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

      Not really 68k Macs, but certainly Vintage!

      7492
      posts
    2. Newton

      The best PDA ever finally gets its own forum!

      1074
      posts
    3. Software

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

      17640
      posts
    4. Hacks & Development

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

      19600
      posts
    5. Peripherals

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

      14853
      posts
  • Posts

    • Read through cheaper 9 of this book. You'll find most of your answers there. It's likely you need to replace the opto coupler.   What version of AB do you have? CP1 should be available from any major electronics dealer.   For sound my CII originally had scratchy sound then lost it all together. After recapping the AB and I think desoldering the sound chip and cleaning and putting it back on it stared working fine. One of the caps on the logic board directly affects the sound. If you pull that trace and don't repair it will have issues as well.  
    • Strange stuff, got connector on solder side? This is all I found, search "formac" on the page: https://appleclub.pl/index.php/en/2018/01/05/macintosh-nubus-se-cards/
    • I have a 47.8MB TIFF (3800x4080px) of a decapped IWM, as well as a bunch of technical information (schematics, specs, engineering drawings, etc.). Do you already have these? IWM_Info.zip
    • That's should do it. Being it's only a single sided board it's a lot easier to desolder. 
    • ASC - too many Macs have ASC's left and right channels blended into mono for for driving the internal speaker. For one, it's a massive PITA to get get past that kluge to wring stereo of out of a Duo/DuoDock even tweaking system and driver for coaxing the PAS16 NuBus card to do the trick! ASC is a large enough package to do the likes of the Portable's kluge chip with modern logic, providing headers or a connector for a daughtercard if necessary for implementing internal stereo in any number of Macs and the likes of the PowerBook 1400c. Dunno if anyone would really be interested in doing something with such a thing when I guess you could hotwire to a line level stereo headphone jack, but it would be neat play with at board or daughtercard level.   On second thought, adding headers to a new logic board design for making the internal headphone jack connection might be a plan. Dunno, ASC/Sound limitations were the first thing that popped into my head when you asked for suggestions.
×