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They're the widely-available Bomarc schematics, e.g. at https://github.com/nickpunt/nubus-se30/tree/master/Schematics/bomarc Nate that the analog board for the Classic II is the same as what's on the Classic schematic.

Oh, my mistake .. I was looking at the wrong schematic .. the Classic II does have +5v, +12v and -12v on the floppy port. That explains my confusion o_O Doesn't apply. Nope - QP1 affects all rails. Your problem is likely a bad IP3 regulator on the analog board.

I was wanting a BHA machine and I acquired, from craigslist, a PM7100 in excellent condition. There was absolutely no sign of capacitor aging - including the PSU. The original 700 MB Quantum SCSI harddrive was function although it didn’t sound perfectly happy. The floppy and cdrom drives were...

I'm confused. The Classic II doesn't have a -12v rail. It has +5v, +12v and -5v. and I've recently restored one - see https://tinkerdifferent.com/threads/a-mac-classic-ii-restoration.4313/ If you're measuring -2.67v on the -5v line, that's not good though. It won't prevent booting but it will...

The IIci startup logic is notoriously susceptible to damage. One testing trick is connect PSU pin 9 (signal) directly to pin 10 (+5v standby) to bypass the logic and force power-on.

Thanks for that reference. Before the DeoxIT treatment worked, I'd searched for a replacement but couldn't find anything.

My Mac addiction started in 1987 with an SE to which I added an 020 accelerator. Next was a IIci in ’92, adding 040 accelerator in ’96. On to G3 desktop in ’98 and G4 accelerator in ’02. And on and on. I still own the SE which works well after an analog board recap and reflowing. Recently, I’ve...

Thanks. At first, I wasn't too confident that I could breathe life into the floppy drive. But the schematics were available and I had similar (although not identical) units on hand for reference. So I poked around and was pleasantly surprised when it came back from the dead. I was particularly...

IIsi's do seem to suffer terribly from cap goo. For more tales and pix of electrolyte destruction see A (mostly) successful IIsi restoration

I used a Pico in my SE/30 but it's wifi performance was poor. The EFI case shielding and the metal chassis attenuates the signal too much. For a while, I used a cheap Vonets WiFi Extender in repeater mode placed close to the machine to relay the signal. But that was a kludge and I ended up...

Do a fresh install of 8.6 on the SSD, boot to it and copy stuff. I don't Disk Copy can help you.

Glenn has my changes and was intending to integrate them into his driver at https://www.mactcp.org.nz/ethernet.html - though he hasn't yet. No, there were a number of changes in addition to the ID to handle the slightly unusual hardware characteristics .. see...

I'm not sure exactly how you're doing this and why you're seeing a 2GB limit .. that's the max HFS volume size. What I would do is to freshly install a system on to an HFS+ volume on the SSD and boot into that. I'd install MacOS 9.2. (Actually, I'd install OSX Tiger as well but that's probably...

The IIsi is rather quirky but nevertheless endearing! Since writing this, Glenn Anderson helped me identify the oddball SSI NIC and adapt his macOS driver for it. I also patched the NetBSD and Linux sonic drivers for it too. I subsequently swapped this NIC with a Maccon from my SE/30 and...

FYI: my G3 B&W uses both solutions. The IDE/SATA adapter is from OWC (as is the SSD) and I have a SiL3112 PCI/SATA card hosting a 1TB spinner. The B&W is less fussy than other G3s and it'll happily use and boot Classic MacOS, OSX and Linuxes from volumes using either solution. You can...

The original part was a 5v 512k prom - I think it was an SST39SF010. I switched the strapping to 3.3v when I installed a socket and the MX29LV040. It had been working fine (on another machine) for a couple of years. In fact, I checked that the 3.3v supply was good because there's a suggestion...

It was the eeprom (MX29LV040). It worked fine for a while. Then I pulled it from its socket to try something. On replacement, it became flakey and soon failed completely - it didn't read correctly on my TL866II+ and wouldn't flash. Another eprom (SST39LV040) was fine .. flashing it in situ with...

Not sure what link you're referring to here. In fact, the actual 3112-based card that works for me in the PM7600 is this that I posted about much earlier - https://tinkerdifferent.com/threads/sata-in-an-old-world-pci-power-mac-impossibru-updated-11-22-23.1494/post-10750 The card that doesn't...

I was initially suspicious of the early OFW version of 1.0.5 in the 7600 but people had reported success with the SeriTek reflash in similar machines with this version. And I know that the ROMs are identical in the cards because I flashed them both myself.

I got a PowerMac 7600. Nice condition but the original hard-drive was deceased; the CDROM was seized; the floppy needed service, and more RAM would be nice. Obviously this was a candidate for the PCI-SATA treatment. So I took a SeriTek-reflashed board from my B&W G3 and stuck it in the 7600...