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    1. The 68kMLA Forum Rules   (9944 visits to this link)

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

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    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.

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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!

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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!

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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!

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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

    • I have 3 great condition PB 2400’s and really don’t want to pull the PRAM’s out on them. The take apart is just a real pain. And to do three is just eyeboggling. I don’t think any have leaked yet but they have to come out. I agree with said earlier I NEVER replace any PRAM batteries. This was primarily for during the time they were used daily way back when. ALL batteries are removed from my machines out or in storage! It should be common practice amongst us collectors. I’m just dredging taking them out of these three.. I absolutely hate the take apart. But my laziness to leave them in will pinch me later on down the road... 
    • Next, it was time to clean and lubricate the floppy drive. Before this, it worked fine, but the eject motor seemed to really struggle.     I got the drive out of the bracket, and found that it was dusty, but pretty clean compared to many of the drives I've seen.     The first step is to remove the plastic bracket that lifts the upper read/write head out of the way when the disk is ejected. To remove it, you gently lift the small tab in the center and slide it towards to back of the drive.     Next, I use tweezers to release the two springs on the sides. There's one on the right, and one on the left, and they are released from the bottom of the drive.     Next, we need to release the upper part of the drive so we can lift it away. It's a bit hard to show in the photos, but you can see where my fingers are sitting on two mechanism that pivot/slide back and forth. Basically, you just slide them away from the each, which will disengage parts of the drive causing it to separate. You'll know when you've done it right, the drive snaps down very suddenly. It's not scary or anything, you'll just know when it worked.     Once the top has snapped down, you can lift the top out from the left side. You might have the slide the lower tray forward and backwards a bit to clear everything, but you can work it out pretty easily.     With the upper tray removed, it's time to remove the eject motor and gears. I use my impact driver on these to make sure I don't round out the Phillips heads, which I have done. And it sucked.     To remove the lower tray, there are four little snap rings to remove. I use a pair of needle nose pliers to pop them off.     And with that, the drive is disassembled and ready for cleaning! Let's tackle the eject gearbox first. Releasing the cover is pretty easy, just press a small screwdriver into the clip towards the back. Be gentle here... I haven't broken one of these yet but I would not be surprised if this plastic was super brittle.     I didn't get a picture, but the gears looked great. I added a couple of drops of DuPont Silicon Teflon lubricant.   Next, I cleaned up the upper and lower carriage mechanisms on the drive. I just scrubbed them down with a toothbrush and Dawn dishwasher detergent, and then blew the moisture out with the air compressor.     The drive itself got hit with the air compressor, and then I used cotton swabs and alcohol to clean up any remaining grease.     Next, I used the little tube of lubricant that came with my Prusa i3 MK3S printer to lubricate the sliding parts. It's a bit thinner than lithium grease.     After lubricating, I installed the bottom carriage, and snapped the rings back in by just pressing them on with my thumb. Then I set the upper carriage back in place, used tweezers to reconnect the springs, and actuated the things to pop it back into place. As I write this, I realize how difficult the process is to describe, but once you get it, it is very simple.     Finally, I reinstalled the small plastic clip that lifts the upper read/write head, and tested a disk! This is a dead disk that I use as a coaster on my desk.     The disk seemed to eject a little half-heartedly. Whoops, forgot to lubricate some of the parts on the top carriage. No problem, not too late.     Disks fly out of the drive now! To finish up, I reinstalled it in the hard drive caddy.  
    • don't forget to remove the tiny cable going to the fan and the big one to the CRT
    • Arggh, the package to Canada came back twice because of corona related delivery problems. I think it did not even leave Germany. Refunded the Canadian, readvertised it on the bay and sold it again, this time to Northern France. I wonder if it was someone from this forum?
    • Badass machine! Really cool to see such a high-clockspeed CPU upgrade in there - congrats  
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