Apple Mac Performa 630 DOS Compatible Restoration Part 1

Apple's official website about the Performa 630 DOS Compatible:

Main Board Capacitor Positions and Values:

Power Supply Capacitor List and Information:

TIME STAMPS:
0:00 Introduction & System Overview
6:42 Sponsor Message
7:16 Potential Performa Problems
8:38 Extracting the Main Board
9:53 A Look at the PCBs
12:40 Removing the PC Board
16:43 Recapping the Main Board
24:58 Inspecting & Replacing Power Supply Capacitors
42:03 Thank you & Good Night

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Thanks for watching!

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#JanBeta #Apple #Macintosh #Performa #DOSCompatible #Performa630 #Motorola68040 #Recapping #Restoration #VintageComputing #RetroComputing #PowerSupply #PCBWay

[ronny]

Always amazing to see that there was an "Apple" in the past beyond slim, not repairable and e-waste after use. The whole device looks well built and worth restoring. Thanks for sharing!

[thebyteattic]

Great video, Jan. It's always a good thing to re-tin the traces that you scraped with a fiberglass pen, as they lose metal. Re-tinning protects the copper from corrosion and thickens the trace, helping it recover its original electrical conductivity (during manufacturing, traces are tinned before the solder mask is applied on top).

[reidster]

Wow, I didn't realize the DOS Compatibility card fit into the 68040 CPU socket on these. I've worked on a bunch of other LC/Performa systems including the "regular" 630 and I assumed that the DOS board only connected to the LC PDS slot. As for the PDS (or Processor Direct Slot) it's a proprietary expansion slot that exposes the CPU bus (or a subset of it) to expansion cards. While NuBus was standardized, the PDS connector, compatibility, and specifications differed in a number of Mac families. The Mac SE introduced one version, the SE/30 and IIci a second one, the IIfx had its own. NuBus equipped Quadra models had yet another type. The Mac LC introduced the LC PDS slot, notably used for the Apple IIe cards, and important for marketing to schools with existing Apple II software. As the LC series evolved, Apple maintained backwards compatibility with the earlier LC PDS slot, eventually extending it to 32 bits as in your 630. It can be found in the 68k Performa, LC, Colour Classic, and LC-based Centris/Quadra models. Until PCI was introduced with the 6360, PowerPC Performa/LC models retained the LC PDS slot for backwards compatibility, though it was no longer directly tied to the CPU bus. On 68k machines, PDS was simpler to implement on the logic board than NuBus, and offered greater bandwidth, lower latency, but was typically limited to a single expansion card. PDS in general can be compared to VLB on 386/486 PCs.

[UpLateGeek]

I'm glad you're putting the effort into repairing and restoring this Mac. Mostly because I wouldn't want to be the one to do it! But also because I agree that this could be an interesting machine.

[Colin_Ames]

This is going to be an interesting series of videos. I look forward to the next one.

[Astfgl]

This is such a cool machine! I bet Apple loyalists hated it back in the day, but now getting both a fast 68k Mac and a 486 DX2/66 in a single box? That is a retro enthusiast's wet dream.😄 I'm looking forward to part two and seeing this thing up and running!

[meh]

Looking forward to episode the second.

[wimwiddershins]

Cool machine, it's always fun to see these hybrid concepts.

[humidbeing]

Thanks for all the great content, Jan!

[chrisjones]

It’s refreshing to see someone using an ESD strap while working on electronics. I know the usual arguments people use that “it doesn’t matter much”, etc. etc., but honestly a wrist strap is so little effort that everyone should use one. (Not to mention that ESD damage is often not obvious or immediate, so may not be discovered, why risk it?)

It does my heart good.

[lorensims]

Very nice!
My wife and I had the Performa 637 & 638. They were identical except that my 638 included the TV tuner card.
We were still skeptical about the new PowerPC Macs so we went for our old reliable Motorola 68K CPU.
We were not in the least interested in any sort of PC compatibility, though we did try out VirtualPC when it came out. MacOS could already read and write PC-formatted floppies by then, and that's all the PC compatibility we needed.
I understood the IDE hard drive was for cost savings. More popular and all that. The Performa 63X series was full of cost-cutting measures like that. We appreciated that they weren't as expensive as we were expecting. That's why we got two!
Yes, we had 4MB of RAM, which was a nice upgrade from our old Macintosh IIsi which would only support 2MB.
Our higher-numbered Performas had 350MB hard drives.
This was indeed from the time when Apple was fully and truly doomed.

[me]

I had a Performa 638 (still do I think, no idea where it is), complete with video capture. It's amazing to see you rip through this one!
Keep going with the power supply. replace all the caps! I do this all the time with my Atari ST power supplies by default (it's an Exxos recommended fix).

[jammi__]

I have the Houdini II card in my Quadra 950. It was from the 6100 Dos Compatible, which had an unique PPC 601 -> 68040 PDS slot adapter at a 90° angle, so I fitted it directly into the 040 PDS slot on the Quadra. The Houdini II has a DX2 and SoundBlaster 2 integrated, so it's like a perfect retro DOS gaming PC.

[JapanPop]

I have a later Performa 640CD Dos. I will have to recap it soon. First need to finish the analogue board on my Mac Classic.

[michvod]

Capacitors on 630 mainboard don't leak, so they are not really needed to recap. They switched to newer (much more stable) type of SMD caps around 1993/94, so the Performa 630 got new ones.
But their PSUs are different story, they really need to be recapped, at least partially, as there is at least one capacitor (C8 I think) that will start to leak.

Of course all those machines being 30+ years old at this point, they could still have capacitor issues despite them not leaking :)

[horusfalcon]

Sounds like you have your work cut out for you, Jan. It is not unusual in this kind of work to discover things that make you want to back up and take another path. This will be an interesting project to follow. Thanks for sharing with us!

It sounds like you have some solder mask on hand, but if you don't you can also use nail polish for small repairs in a pinch.

[TheRus]

For safe removal of components, it is best to use Wood or Rose alloy to reduce the melting point.Even DIP components are easily soldered out.

[OtterlyInsane]

IDE drives were significantly slower throughput than SCSI until around when Apple switched to IDE, I believe that is the prime reason why the switch happened. Even after they switched to IDE internal drives, SCSI stayed as standard until the G3 new models as it was still used on a lot of Macs for scanners, etc.

[toronado]

OMG my first Mac was a Performa 630CD. The college I taught at had one of those DOS compatible variants like the one in this video.

[RacerX-]

NIce! I have a Perfoma 640 DOS that I have owned for many years, which I am guessing is similar to this one? So this is a great reference for when I will have to do the same and replace all the caps. Thanks for a great video.