The MFM drive in that thing is already a zombie
Wed Aug 30, 2023 10:38am

Everything on it has been backed up because the read head likes to get stuck and has to be manually unstuck for it to start reading again. Lubing the actuator only lasts for a bit before it gums up again. I have
everything on the CF card but I should back it up again as it's been a while.

I guess I'll try using it again either tonight or sometime this week and see if it happens again. I'm also worried it might be the monitor as the monitor also plugs into the power supply. I have a second 5151 that I can use but nothing modern to rule that daisy chain option out completely.
Thanks for the PSU schematic. I have my PSU for my other XT apart still from.. I think years ago now... where it blew. Maybe I can finally get around to fixing that one before this one possibly blows up on me.

  • Only way to know is to try it - Puckdropper, Fri Aug 25 2023 5:27am
    And backup your data, just in case. Those hard drives don't always transfer very nicely. My guess is the light flicker was just enough for something to turn off the "power good" signal from the supply, which tripped some sort of protection circuit. After things cooled down, it was good to go again.... more
    • The MFM drive in that thing is already a zombie- Erik_, Wed Aug 30 2023 10:38am
      • You can plug the 5151 in directly. It was just a nice thing - Puckdropper, Wed Aug 30 2023 4:44pm
        to have the PSU and monitor shut off at the same time. I wonder if you're using the right lube? Mixing lube types can cause gumming. It's more prevalent in greases, but I'm sure some oils are the same way. Maybe you need a "park.bat" where it copies the files to the CF card then runs "park"... more
        • That's actually how I currently have it set up - Erik_, Thu Aug 31 2023 10:51pm
          I have two 5151 monitors. One for each XT. I'm definitely not using the right lube. It's just some generic stuff which is probably causing some gumming up like you said. I actually have a copy of the park program. (It was on the MFM drive since forever.) Parking the MFM would probably be a good idea.... more
          • Just like car oils, there's different grades - Puckdropper, Tue Sep 05 2023 4:50pm
            I have a few lubes I use for model trains, one's a sorta heavy one called Labelle 102 and the other is a thinner one, I think it's Labelle 107. You probably want the thinner one. However, if it's sticking because of the wrong lube it'd be good to clean off all the old lube before applying new. For... more
            • This is the lube I've been using - Erik_, Wed Sep 06 2023 1:13am
              It's called 'Tri-Flow Superior Lubricant'. I've used on my laptop fan as well that has a bearing going south. Worked really well. After two applications, it hasn't grinded since. It would be nice if I could remove the old oil from the 1980s + my additions before putting more on... I'm just not sure... more
              • Is it a pretty thick oil? - Puckdropper, Wed Sep 06 2023 12:57pm
                Sometimes you want something pretty thin, especially for getting in to things. (That's something that WD-40 is really good at. It's just not good at staying there and lubricating.)
                • Its actually very thin - Erik_, Wed Sep 06 2023 11:05pm
                  Almost has the consistency of gasoline.. smells terrible too. The 'PTFE' in the label is basically teflon. I looked up the wikipedia page and it looks like PTFE is also used in bearings so I guess it's the right stuff? My guess is that it's probably... more
"Forces act when not restrained" - Puckdropper