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Everything posted by Jinnai

  1. Jinnai

    512K Disappointment

    Awesome job! The SCSI port is awesome, I have one, just need to figure out how to get power over it so I can use an SCSI2SD .
  2. Jinnai

    Horizontal lines on PowerBook 180c

    If it's like the 180 not-c, then it might be caused by leaky caps causing shorts on the LCD board surrounding the LCD.
  3. Jinnai

    SE/30 Recurring Freeze at Cold Boot

    If it were me, I'd try swapping parts. I don't know much about complex CPU/ROM issues. If the horizontal movement is so rare, I wouldn't let it bother me, but perhaps rather consider it a possible clue about the computer's issue. The confusing thing is, one seems like an analog issue, while the other seems like a digital issue.
  4. Oh man, I had a lot of those a few years ago and the whole thing was a mess. I think most of the problem was PSUs as well, but couldn't be sure it wasn't quirks with the PMU or IDE or whatnot.
  5. I've taken stuff from the dump before. I say if it's possible to do it without getting fined, go for it. If not, I agree that's really lame.
  6. Jinnai

    SE/30 logic board foreign object?

    I'd be more concerned about where it came from, lol. Maybe the FDD or HDD.
  7. Johnnya had the same issue. I have his PSU, but haven't had time to really dig into it yet. I'm suspecting the main switching transistors. I also found a faulty diode near the PWM chip.
  8. I very seriously considered doing the same thing! Very cool! (I have a hackintosh in a G4 MDD case so I opted to put an ADC adapter inside the tower case instead, if I can figure out how to run the wires without borking the data signals with EMI). How did you get the soft switch to work? Did the Samsung monitor require any modification at all to fit?
  9. Jinnai

    Board repair recommendations

    That's quite a few traces for one chip, you might want to rethink your method but don't worry, it's not the end of the world. If it were me, I'd run a bodge wire to the nearest pad or via in the trace. Johnnya actually has a IIfx that I fixed that way
  10. Jinnai

    Craigslist Mac SE, Mac SE, and Mac Plus

    I'm jealous of that fan, it looks awesome to me. I've never been bothered by the sound level of computers and I've never seen that kind of fan before.
  11. I replaced all the radial caps in my SE/30 PSU except the three largest, but it still doesn't work. I measured the voltages with my multimeter, with the negative probe on the black wires and the positive on the red/yellow/orange ones, and the voltages I got ranged from about a half volt to about 1.5v. What could it be thinking? Is it very likely that I need to replace the huge 400v ones? I thought they were not very prone to failure.
  12. Jinnai

    Macintosh SE/30 Sony PSU not working

    So I have been slow and all that but I have gotten around to checking the input voltages for the PWM chip and they were pretty good. So I swapped the two main fast switching transistors and saw a voltage much closer to normal. I swapped in ones from a unit that already was suspect for having bad transistors, so before I proceed I want to replace them with a modern equivalent if possible. They are marked C3042, and I'm guessing that is equal to a Sanyo 2SC3042. I found one I think might work as a replacement - a Fairchild KSC5338D, what do you think? The current problem I don't know if there's still something wrong with the transistors, but the voltage varies a bit when it's turned on, depending on how long its been off. Perhaps the issue will go away when it's under load. Also, -12v is not working, so I guess I'll be hitting the schematics again for that. I don't think I really understand what negative voltage is yet.
  13. Jinnai

    Free Macintosh Plus!

    d-did you get a capacitor backwards... the weird thing here is that it used to kind of work....
  14. Jinnai

    Free Macintosh Plus!

    Well, don't be so afraid of it it won't leap out of it's case to get you, at least. If I were you I would attempt to power it on with the rear case off and figure out if the noise was the speaker, the FDD, or the CRT. I had one that somehow had a short in the CRT, and it made a noise (though not necessarily like this one) and the end glowed purple. I know you said everything is connected but to mention again the ground wire going to a top CRT screw...
  15. Jinnai

    Free Macintosh Plus!

    At the risk of sounding stupid, but with the possibility of learning something new, I'll say that I didn't know it was supposed to suction anything, I thought it was just a big insulator so you couldn't accidentally touch the anode with anything, even a small wire.
  16. If you think it's worth $1000, why ask for one free?
  17. Jinnai

    Advice on repairing Mac IIx

    I've had no issues when leaving socketed chips in and then letting it dry sitting at an angle with a fan blowing on it.
  18. Jinnai

    CJ's miscellaneous finds

    oh, I have that upgrade board in my 128k, it's a very nice one. There is, somewhere, a bracket and adapter board that mounts a 50-pin hard drive vertically behind the FDD, that would be nice to have.
  19. Jinnai

    How interesting is the Lisa?

    No, if you can't do much with it I don't find it interesting. I would just look at it and feel smug if I had one. Which I would like to do.
  20. Jinnai

    MacFox's Finds

    Maybe like $5 + shipping? If you happen to be in the US, shipping should be around $2.
  21. Jinnai

    MacFox's Finds

    Do you have any use for this stick of RAM from my Centris 610? There's also a 1 meg ROM SIMM. I'm not sure what capacity the RAM is. It has 8 chips that read "Mitsubishi M5M417400A" and 4 that read "M5M44100A". The Centris is capable of booting, but has no drives...
  22. Jinnai

    CPU upgrades for Cube

    It's unfortunate, but I'd hate for you to risk damage to your cube... the box says on it "Requires Cube Installation Kit: Kit P/N SGC-KIT for 800MHz and 1.2 GHz G4 only, Kit P/N SGC-VRM supports any speed." I'm not sure exactly what that means but perhaps it originally intended to go with a VRM upgrade.
  23. Jinnai

    USB FDD behind Zip Bezel of B&W G3 or G4 Graphite/QS

    I considered buying this. Little concerned it wouldn't work with formats besides 1.44 though. I like writing Atari images and such...
  24. Jinnai

    CPU upgrades for Cube

    I actually do haha, I should look at it and figure out what it is. I know it's just the card, lacking some sort of bracket or heatsink, so it might not be useful.
  25. Jinnai

    Asante MacCon SE30 affecting video

    Three year necropost...