68kMLA Classic Interface
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| Restoring a Quadra 700 (warning: photo heavy) | ||
| Posted by: joshc on 2021-07-06 21:30:25 I recently scored a Quadra 700, a few weeks ago I had some time to give it some love. Here's what I did... This Q700 really wasn't in bad condition to start with, and already worked, so my main focus was to clean everything up and improve anything I could as I went along. To start with, I fully disassembled it - the case and logic board had some dust bunnies, nothing awful but it needed a clean.   The internal case came out well after a quick brush to remove the dust:  The front switches and clear plastic LED piece for the front power LED were removed and dumped in hot soapy water:  The black side strips that run along the length of the machine were cleaned, they were rather dirty!  The rear I/O panels and NuBus slot openings were cleaned out   Some photos of the case before cleaning:   The top lid before cleaning:  Washing up liquid and a scrub is all I'm going to do on this.  Came out really well...  Same treatment for the front  Front vents were cleaned/rinsed out:  All the other little bits were cleaned and dryed  The logicboard was brushed down and lightly swabbed with IPA:   Starting to put things back together, looking quite sparkly and new really:  The floppy drive was definitely the dirtiest part of the whole machine...  I already knew it read disks OK, so I thought it worthwhile giving it a full clean - but I also knew it wouldn't eject disks, so there's something going on there. The drive carrier was a bit dusty, not too bad.  That was rinsed and dried off, looks great now  So.... onto the floppy drive. Before:  After some initial brushing to remove the worst dust:  Removing more bits revealed more dust...  Going further, lets clean it up...  Yep, broken eject gear. Same old same old. I don't have a spare replacement right now - so will have to return to this another time.  New grease applied - I was probably a bit liberal with it but I can always remove access afterwards  Everything back together. Can't fully test just yet because of that missing eject gear but what an improvement!  Back to finish off the rest of it... SCSI2SD installed, and the original activity LED hooked up to it:  Looking rather smart, albeit more yellow than my 6200, but still nice and clean now and ready for BUSINESS:  And most importantly, the original HD activity LED works great...  A few days ago, I did a few more things: Replaced the dirty and noisy original PSU fan with a new one. Stock fan:  Replaced with a Noctua NF-A8 PWM:  I also ordered some new RAM, to bring the total from 20MB to 68MB (including 4MB onboard):  Things remaining to do: - Clean out power supply and recap it - Remove the original oscillator and replace with a DIP socket/new 66Mhz oscillator to crank clock speed from 25Mhz to 33Mhz - Get a new eject gear for the floppy drive | ||
| Posted by: jessenator on 2021-07-06 21:43:28 Hey look at that! Your FDD wasn't completely eviscerated by a maxell bomb 😆 Good job on the cleanup. Looks nice. Nice PSU fan replacement. I might do that one day... | ||
| Posted by: krishnadraws on 2021-07-15 04:52:08 great work! I personally enjoy seeing the "before" and "after" photos. | ||
| Posted by: joshc on 2021-07-15 10:17:48 Thanks both for the kind words. I've just done the oscillator swap, replaced 50Mhz oscillator with a socket and 66.66 Mhz oscillator:    | ||
| Posted by: Hollie on 2021-07-15 10:39:28 Yesss the dream is coming together. Does everything still work at that speed? | ||
Posted by: davewongillies on 2022-01-05 12:27:10Thanks both for the kind words.Nice! Where'd you get the oscillator from? | ||
Posted by: jessenator on 2022-01-05 16:00:15Nice! Where'd you get the oscillator from?Can't speak to where joshc got theirs, but if you're in the states, OutputEnablers is actually still around and has them, at least when I ordered mine. That was a couple of years ago now. I'd email them and ask. | ||
Posted by: davewongillies on 2022-01-05 18:03:59Can't speak to where joshc got theirs, but if you're in the states, OutputEnablers is actually still around and has them, at least when I ordered mine. That was a couple of years ago now. I'd email them and ask.Yeah, I emailed Output Enablers emailed today and am waiting to hear back. Fingers crossed 🤞 | ||
Posted by: davewongillies on 2022-01-05 19:40:04Yeah, I emailed Output Enablers emailed today and am waiting to hear back. Fingers crossed 🤞 Tried oe@well.com and got a bounced email returned
Also tried sales@outputenablers.com and that hasn't bounced yet, so hoping that'll yield a better result. | ||
| Posted by: joshc on 2022-01-06 02:15:58 I think I got the oscillator from eBay. They are sometimes available from parts suppliers as well (RS, Farnell, Digikey, Mouser, etc). | ||
| Posted by: olePigeon on 2022-01-06 14:52:57 @joshc Would you mind sharing how your Noctua fan is wired up? I bought one as well, and I couldn't get it to work in my PSU. It would never spin up. Worked fine with the original fan. | ||
Posted by: davewongillies on 2022-01-07 09:48:42I think I got the oscillator from eBay. They are sometimes available from parts suppliers as well (RS, Farnell, Digikey, Mouser, etc).I looked at Mouser & Digikey for the oscillators and they currently aren't in stock. They have a 38 week lead time from the suppliers and a minimum purchase quantity of 1000, which is a biiiit more than I need. | ||
Posted by: davewongillies on 2022-01-07 09:51:41@joshc Would you mind sharing how your Noctua fan is wired up? I bought one as well, and I couldn't get it to work in my PSU. It would never spin up. Worked fine with the original fan.I did the same mod last night in my Quadra 700 power supply. I need to re-open it back up again to attach the low noise adapter cable to the fan, so I can take a photo for you then. | ||
| Posted by: mg.man on 2022-01-07 09:53:21 Found these... https://www.ebay.co.uk/itm/292123966688 Anyone else in the UK want to go in? I'd only need a couple. | ||
Posted by: olePigeon on 2022-01-07 10:18:13I did the same mod last night in my Quadra 700 power supply. I need to re-open it back up again to attach the low noise adapter cable to the fan, so I can take a photo for you then.I was originally trying to install it in my IIci, but with that out of commission, I want to install a couple of the fans into my IIfx. It sounds like a harrier jet. | ||
| Posted by: davewongillies on 2022-01-07 10:18:57 I just found this one in the US https://www.ebay.com/itm/122144500210. Its a pack of 25 though. Does anyone know if this would work? Its only $12 though so I might just get them and find out. | ||
| Posted by: davewongillies on 2022-01-07 11:09:48 I ended up finding this vendor on Ebay who sell oscillators in single quantities, and are in California like me, so giving that one a try | ||
Posted by: davewongillies on 2022-01-07 18:05:31@joshc Would you mind sharing how your Noctua fan is wired up? I bought one as well, and I couldn't get it to work in my PSU. It would never spin up. Worked fine with the original fan. Here's how I connected up the fan inside of the power supply  | ||
| Posted by: olePigeon on 2022-01-08 10:26:08 @davewongillies Hmm. That's how I had mine. I wonder if my power supply was dying. :/ Also, are you in NorCal by any chance? If you are, there's a great electronics surplus store that has oscillators of every frequency and package type. | ||
| Posted by: joshc on 2022-01-12 00:04:39 I connected the Noctua fan the same way. | ||
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