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Jinnai

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Everything posted by Jinnai

  1. Some whine louder than others, so I do think it would be a good thing if we found a way to reduce the noise. I don't know much about electromagnetic frequency stuff though, all I know is that I've heard the frequency of the horizontal overlaps with the human audible range somehow.
  2. Oh, does it work better than before? That's great to hear! Impressive job on the hinges! I have many laptops with damaged hinges, but I've never tried a proper repair. Once there was a conspicuously lacking metal bracket - there never was one there but there clearly was space for one - so I cut one out of sheet metal, and it served to spread the tension across the lid instead of focusing it on right where the hinge was. Horribly bad design thats guaranteed to fail when the plastics age a few years. The other time I didn't feel like messing with JB weld (I've never used it) so I used a Dremel to modify the hinge so that it was looser and put less tension on the plastics. Don't worry, it wasn't a vintage laptop, just a poorly designed Lenovo from the '10s, but yeah it made it rather floppy then.
  3. Heh, I grew up with the sound, even though I'm only in my 20s - we were not rich growing up, and had a 32-inch CRT TV. Since then I've always had CRT monitors for my vintage computers, and most of them make that high pitched whine. For some reason even though my hearing is poor I can still discern it, but my mother absolutely cannot. It's easy to tune it out after several minutes, for me.
  4. Jinnai

    Holy Moly SCSI->IDE 2.5 Adapter

    Wow, I'm glad this was once made, I never knew. I'd like a SCSI to IDE adapter, but that's because I like the sound of a spinning hard drive rather than an SD card.
  5. I've had a horrible time trying to get disk images from the internet to my Apple IIe. What I do is download the .dsk, .po, or .do file, boot my IIgs into ADTPro from 5.25" FDD, transfer it via serial to the IIgs and have ADTPro write the image, and then attempt to run it. Some games will run on the IIgs but not the IIe, but in most cases it appears to be cracked software or software that displays a code error like this: That's not so bad. But a multitude of written disks show "Error #8", like this: And when one does that, it does the same thing on both the IIe and the IIgs. I've tried three different drives, numerous different disk, cleaned the drives, and reseated the chips on the IIe floppy drive board. And I've run the images in an emulator without any issue, so they're not corrupted. What is up with that? Are there simply a lot of images on the internet that work in emulators, but ADTPro can't properly make a bootable disk from?
  6. Wow, that site is super cool! I tried it with my phone, it did nothing. Then I tried it with my laptop and it worked at first but then after about 10 seconds says "chksum error" every time. I recorded the output of the laptop through it's input and it sounded fine to me, so perhaps there is something wrong with the audio port ground in my IIe. I tried a while back with ADTPro's audio function as well and it failed every time - and I tried that for hours and hours. Thanks for mentioning the Slot 6 thing... my card was actually plugged into slot 7. That solved most of the issues where disks would run on the iigs but not the iie. I will say, I found this site: https://mirrors.apple2.org.za/ftp.apple.asimov.net/ and the files from it have worked better than what I was using, which were primarily from: http://www.apple2online.com/index.php?p=1_33_Games-Library I wonder what might be different between two images that would cause one to work in an emulator but not on real hardware?
  7. I do indeed have a IIe Enhanced. I've encountered few disks that run on the IIgs but not the IIe - that appear to be actually coded for the IIe - but one is Arkanoid. It worked great on the IIgs, but on the IIe the disk just spun forever and the screen displays "Apple IIe". Perhaps someone can link me with an image of one of the games I mentioned that worked for them, so I can see if the issue is the system I have for writing disks, or is the IIe enhanced?
  8. Yes, at least thats what the disks I'm using say: If I transfer the image of ADTPro, it always boots with no problem. But for examples, I have not been able to run images of Galaxian, Tetris, or Dig Dug (which it seems to me, as someone totally unfamiliar with the matter, could be due to copy protection). I have tried some others that had the same issue though, here is an example file: https://www.myabandonware.com/game/alien-typhoon-7lf
  9. Jinnai

    Rusty Macintosh SE/30

    If you happen to have the Sony CR-44 one I think I would like one, so I can trade components and try to understand it in absence of an oscilloscope, unless you think that's a bad idea. I really am trying to understand power supplies by googling, but it's been difficult. I should mention though that there is a possibility that I'll sell this unit if I fix it, if that matters to you.
  10. Jinnai

    Rusty Macintosh SE/30

    I finally got all the capacitors in (except the three largest) and immediately replaced them all. That had no effect. I made a separate topic for discussing the PSU repair. If I could just get it running I'd be well on my way to having it running.
  11. Jinnai

    Can anyone check their IIfx for C27?

    All SMD capacitors in Macintoshes are 16v 47uF
  12. Jinnai

    Ext floppy drive stuck?

    Well, what was the issue?
  13. Jinnai

    Ext floppy drive stuck?

    "video unavailable" The mechanism is quite simple in these drives so a video would definitely help understand whats going on. I once had a drive that was stuck like a rock, but it was the larger, heavier 400k drive, I would not expect the same failure out of an 800k. Still, the procedure I used for that was was WD-40. Not for lubrication, but to thin out the old hard grease, and I had to essentially drench the whole thing in it. That drive never did start working haha, it has rotation speed issues now. In my FDD, the metal part circled in red is nearly fused to the frame, and it's the part you'd need to move toward the back in order to simulate injecting a floppy disk. Does that part move for you? In the picture you're missing the plastic thingy that the head rides on, not sure if that's just cause you removed it for cleaning.
  14. Jinnai

    Macintosh SE FDHD No Video or Raster

    I love it! By the way, you probably can get files to it by accessing the USB FDD with a program called CiderPress. I don't know about a mac, but it works on a Windows PC, CiderPress opens the physical drive and lets you insert a file. I'm a little concerned as to why your desk is so empty mine is packed with random Macintosh stuff...
  15. Jinnai

    Ext floppy drive stuck?

    You might be able to, I'm not going to say you can't! But what I do is, I use it to dilute the old grease, it's good at that, and then wipe it off and for actual lubricant I use white lithium grease, available at auto parts stores. It works well.
  16. Jinnai

    PowerBook 3400c Repair Stories

    I had a Classic II that booted to a gray screen and the issue was either RAM or a dirty motherboard, I'm not sure. Is there any chance the issue is caps? I only know about caps so... I hope you can figure out the issue.
  17. Jinnai

    68LC040 in Centris 660av

    It's toxic? I haven't been very careful about contact with it...
  18. Jinnai

    Rusty Macintosh SE/30

    Thanks! It does look pretty nice. Although it is a lot easier than troubleshooting power supplies For reference, it was about 8 hours in a wastebasket of vinegar, then washed and dried, then sanded with a sanding sponge.
  19. Jinnai

    Rusty Macintosh SE/30

    Hey sorry for the late response! Thanksgiving kept me busy for a bit there. Although Thanksgiving break was what gave me time to work on this; now I have to go back to school so I'll have less time. I'll take a look at the schematic. Hopefully I can understand part of it. I did clean the ROM socket and contacts. This motherboard was in very poor condition before, so I'll have to look closer for rotten traces. I had a pic of the motherboard before, but I don't know where it went. I replaced the caps. I wish I could try replacing the multiplexors, but it has never given a chime of death, either the normal one but distorted, or none at all... I'll try to get a pic of the board, but my phone camera is rather scratched up and blurry. I must say, it's sometimes booting, but when it does, while it works, the boot chime sounds distorted, kind of grindy. In the OS, some sounds sound normal, but the more plain beep sound sounds a little like that, though not as much. The CRT neck board still has some issues with rescan lines. The problem is not the analog board, so I'll try replacing some other things on the board, since I already replaced the transistor. The PSU is also not working - I'm currently testing with one from an SE. It's showing between about 0.8 and 2 volts on my multimeter, so it's operating, but the voltages are far too low. Any ideas on that? In positive news... here is the frame! Before: After:
  20. Jinnai

    Rusty Macintosh SE/30

    That book looks incredible. Thanks for telling me about it; I go through a lot of Macs! Already ordered a copy. Although, I wonder how many of the parts it mentions are still available.
  21. Jinnai

    Rusty Macintosh SE/30

    Well, I already recapped the board, and cleaned it, so I don't know...
  22. Jinnai

    Rusty Macintosh SE/30

    Franklin, I didn't think of that, good point. That would certainly kill the HDD judging from the rest of the case. I might take you up on that, I'll see what I have. I have two or three spare drives, though I think most are 800k, but the issue is, while I can swap parts, I cannot align them, I don't have the tools or knowledge, so their usability for parts is a bit limited. LaPorta I did see the post, thanks! Right now I'll try vinegar though, as it's cheaper and not terribly important right now... I really don't know what result I'll get. I was staying apprehensive about the motherboard, and right now I can't figure out how to get past this: Unfortunately I don't have an oscilloscope to test anything. It does the same thing with or without the ROM module, so I don't know if it's an issue with the ROM, or the motherboard not getting to the point where it can use the ROM. It was working last night but apparently stopped; perhaps the motherboard should be washed again.
  23. Jinnai

    Rusty Macintosh SE/30

    The CRT was dead and killed the CRT board - specifically I believe the retrace blanking circuit - so I replaced a transistor as suggested in this thread, and now it works fine in that regard! Picture of the issue; it had a blown cap as well that prevented booting, but after replacing the cap I got this until I replaced the transistor: Pic of the solder area as I replaced the transistors, conveniently they were very easy to replace: Next I'll try getting the rust off the frame. I replaced the caps on the motherboard and so far it's working...
  24. it would matter for internal charging, right?
  25. Jinnai

    Rusty Macintosh SE/30

    I got a new PSU switch in today (https://www.ebay.com/itm/323539000187), as the original was incredibly rusty inside - unfortunately the PSU is still dead, my multimeter reads between 0.7 and 2 volts, though that is without a load. It didn't power up the Mac anyway. But the switch works and is a lovely fit.
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