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@blindowl Too late ;-) - I just wanted to tell you about the localization problem. I hit the same thing yesterday, but found the solution somewhere on the web before coming here. Were you able reach any speed higher than 9600? I'm too stuck at this rate on my Mac Classic. This is true for PPP...

Reading this I think your Classic Mac Repair skill are more advanced than mine. But maybe I can be of help still ;-) I had a wobbly screen problem with a Mac Classic recently (connected to disk drive activity). Replacing all the caps, some diodes and the QP1 optocoupler did not fix the issue...

So applying a generous amount of contact cleaner fixed the problem. The potentiometer seems o work as it should now! This almost finishes this Classic's restauration. The only thing left to do, is to finally figure out how to make the SDcard extension cord working for the SCSI2SD (as in this...

OK thank you. I will take the pot out and see if I can find anything about its values and replace or clean it. The story will continue after that ;-)

Congratulations! You saved another one :) And as I wrote in the other thread - I'm still trying to figure out some things with my Classic's AB, altough the Machine itself is not working as it should!

Yeah, that has been my first guess too. But it really feels like peaking a tuned circuit. I could easily tell the maximum by just listening to the RPMs of the fan. Is there any information about the PP1 potentiometer? Its range etc? It would be easy to replace and test of course. Or is there...

Yes, but what about the fact that I had to "tune in" the maximum voltage? It is not like described in the Classic Mac Repair Notes. Turning  PP1 to the left decreased the voltage, as did turning it to the right. There was a sharp maximum in the middle with the voltages written above. For me...

No, ferrite cores also do not help :(

Thank you for the link. As I read it, it means some cables work, some don't  - pity :( I will try to clap on some ferrite cores. It may reduce electromagnetic interference, or it might add to the cables capacity an make everything even worse. I will try it anyway and report.

Hi! I have a SCSI2SD 5.0a set up in a Mac Classic and it works fine so far. Now I would like to be able to easily reach the SD-Card for swapping it out/making backups etc. So I got a SD-Card extension cord and wanted to put it behind the Classic's lock slot in the back. But unfortunately it...

Success! - but more Questions :( First off all - adjusting the voltage fixed the wobbly screen issue - Hooray! But this did not work like I expected. Reading through the Classic Mac Repair Notes, I found that moving PP1 counter-clockwise should increase the voltage - although it does not...

Just checked on a 2003 G4 MDD and it's the same. Since this is the last OS9 Machine, maybe they did not implement the Suspend to disk feature at all? Or it's because this is a Desktop with no danger of a battery running out of power while the system is seeping.

Here, try this: XPostFacto

Yes - even Mac OS 8.6 that came with the first Blueberry iBook was able to hibernate. This is "Suspend to RAM" of course. If you're talking about "Supdend to disk" then I cannot remember if this was possible.

I just changed this part yesterday. No socket and it works. - See this thread. Try not to heat it up more than necessary, but this should be standard practice anyway. BTW, I used a CNY17-3 instead of a CNY17G-3 because it was readily available. As you can see, I'm following the same general...

I have now replaced the Diodes and the Optocoupler and it did not help. The screen is still wobbly on Disk (SCSI2SD) Activity. The Picture now seems to be a bit narrower on the top too, I did not see this before. Two things are notable: I could not get a CNY17G-3, at least not quickly. So...

Knew it - just when I found the missing firmware files on the internet, I remembered where I saved the according archive a few years back. So with the firmware files it just works. The Serial ports are /dev/ttyUSB0 and /dev/ttyUSB1 - easy ;-)

While looking for the Linux firmware files I found this: Hacking the Keyspan USB Serial Adaptor Relevant and interesting! I'm still looking for the firmware files. I'm pretty sure they used to hide somewhere in the "nonfree" firmware packages of Debian - just seem to have vanished though ;-)

Good that you asked - it is not as I remembered. It does work but you need the firmware files too! You can enable these specific Keyspan adapters very deep down in the Kernel config if you build your own Kernel. But since the Linux Distribution usually configure everything and the kitchen sink...

With Linux it doesn't. Plug it in and it just appears as two serial ports. - For all distributions I tried this is.