Jump to content

karrots

68kMLA Supporter
  • Content Count

    131
  • Joined

  • Last visited

About karrots

Profile Information

  • Gender
    Male
  • Location
    Utah, USA

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. I was reading the II/IIx startup schematic and looking at the battery board. The numbering on the battery board is different from the II motherboard I have. So I thought it was connected wrong at first. Then I paid attention to the board orientation and realized the issue is the battery board battery numbers don't match up with the logic board underneath. https://www.downtowndougbrown.com/2015/03/explanation-of-the-macintosh-iiiix-power-onoff-circuit/
  2. With TLS 1.2 becoming the norm I doubt any 68k versions of Eudora will support that as it came out in 1999.
  3. I went with some M3 plastic screws and nuts I had. Worked great. Yes I did have to remove the corner one as I forgot that's how the back plastic attaches.
  4. I had to remove the speaker from a classic analog board for proper cleaning. I'm wondering what ways people have reattached. I was thinking of using some plastic screws and nuts then melting down. Just wondering how firm things need to be for proper sound.
  5. I'll see if I can test it. I have this board mainly as a spare. I believe it was working before I embarked on recapping. I kinda figured while I'm ordering stuff and in a desoldering mood I'd replace it so the leg doesn't get more corrosion. My main concern was the board had pretty good leakage around this area. The copper on the backside has some black streaking but plenty of good copper left after cleaning off the solder mask and taking a scalpel and a scratch pen to it. You can still see some residue around the power wires. I need to remove the speaker so I can clean
  6. I'm refurbing a Classic Analog Board 630-0525. I'm not liking the dark legs on what looks like a voltage regulator at IP3 near the speaker. I'm wondering if any one can confirm if the following part will work? Looks like 35v output https://www.mouser.com/datasheet/2/389/cd00000539-1795613.pdf
  7. I do and I've also got a logic probe and I see signal on all the pins. I need to validate continuity. What makes me think the single wipe sockets are possibility the issue is that when I put the logic probe on is when the bong happens. Or when I press on the sockets.
  8. I haven't had a chance to take a close look at the bottom around the ROM sockets. I'm thinking of removing the sockets and replacing to see if it's just a bad socket. They do look like single wipe sockets so probably a good idea. I may need to get some new ones before I can go that far. Need to check my stock first.
  9. I've used rubber cement for glueing things like this back in. Nice thing is you can rub off the extra. I'd you need more stick contact cement works as well. https://www.homedepot.com/p/DAP-Weldwood-3-fl-oz-Original-Contact-Cement-
  10. Lets try the image this way. I was thinking 22uf and 6v as well but got wondering when I couldn't find that type/size now. I realize i can go higher. It seems like they've all moved to 6.3v for this size. I'll measure the voltages on the board to be sure.
  11. I've been going over the schematics. I thought I found a bad trace on the audio line from the sound ICs turns out it was fine. I notice if I push reset after powering on then I get the partial sounds and static but basically never on first boot. I'll take a closer look at the ROM lines. I don't remember the original condition but I don't think any caps leaked close to that. I have removed and reinserted the ROM chips with some deoxit. I'll go find if I kept any original photos to see possible damage as well.
  12. I have a Micromac Marathon accelerator in a Macintosh II. I'm trying to identify the capacitor markings so I can replace them. Any thoughts? https://www.micromac.com/products/marathon.html
  13. I can't speak to these ISOs but I know I had a hard time installing system 7.5.x on my SCSI2SD on native hardware until the newest firmware was released allowed blind copies to be turned off. It would always get to specific files and die.
×
×
  • Create New...