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OCCUPATION

Found 6 results

  1. So this is not about the retrobrite that the 8-bit guy completed, that turned out very nice. Instead it is about this really bad video he did, sorry I know some of you may like him but this video was wrong in so many ways that I had to warn potential viewers. I couldn't comment on youtube because they were not available for this video. Do not twist off caps from any logic board, it's not in the manual as it were for a reason … you run the risk of ripping of the pads that capacitors are soldered to. Once a pad is removed through the force of twisting off a cap, a time consuming repair is definitely at hand, even if they don't tear off the board they can come loose causing continuity problems later on. Please watch some other videos on how to desolder. No manual will ever tell you to twist off a capacitor but you will find desoldering procedures. This is the legendary Mark Siegel from PACE. I don't expect folks to purchase all this gear to remove a few caps but this man is a legend for a reason. You can learn a lot from him and the other PACE video below. These are really interesting videos in my view. You will learn so much! There are excellent videos on the topic of soldering, it's actually an amazing thing (tin and lead). I hope you find these interesting. Washing logic boards in a dishwasher, this is medieval (sorry what term should I use?), the water is not the proper kind, it can leave minerals and other residue behind that in the long term has a negative impact. He could have cleaned his board with isopropyl alcohol and a for for purpose anti-static brush or taken the time to clean up manually with a cotton swab. -- The lesson videos on soldering by PACE will present cleaning methods throughout. No ESD protection? Without grounding the board and yourself the risk of electrostatic discharge is completely possible and any damage is practically undetectable by our senses. The damage this discharge can cause is microscopic and can result in latent issues that manifest into crashes, system freezes etc. I hope this will equip you to perform any rework on your Mac or other electronics with safety to the board while ensuring a good solder job and good clean up.
  2. Hi all, I've just had a new / vintage macintosh arrive at the lab See the following video on my Youtube channel to find out what it is, have a tour and do some gaming Hope you enjoy, Steve https://www.youtube.com/watch?v=__yarkfWf_Y
  3. I have a LC III and an LC II, and as you know, they have an empty FPU socket on them. It would be nice to put in an FPU in them, right? You know it. But I also have a couple of LC Ethernet Cards with an empty FPU Socket on them as well. Actually, of the 3 cards I got, 2 have a FPU in them (68882 @ 16MHz) and one has an empty socket. Its obvious that they were made for the LC. This got me thinking - the 68K can support multiple FPUs. So can I put in an FPU in the logic board and another FPU in the ethernet card? Though the CPU can support it, will the software support it? Will there be any improvement? What do you think?
  4. I have just recapped the LC II. After a recap, it worked correctly -- it had a steady picture, it chimed and it booted off the SCSI CD-ROM into System 7.5. Then I installed the Asante network card, which was originally installed, and it stopped to chime, but it boots and works correctly. Removing the card did nothing. Also the board was throughly cleaned twice, so there is no cap leak residue. I discovered that it actually chimes, but extremely quietly, if I put the speaker next to my ear, I can hear a faint chime sound. I also triple checked all my recap work, and found no problems. Also there is very very faint sound on the 3.5mm output. I believe that the audio amp IC is not working... or perhaps I missed something, any possible guesses?
  5. This has been on my mind for years, and have never acted on it. But where does it say that an LC or Classic is stuck at 10 Megs of RAM? Most II Series data bus is 32 bits, thus making a 4MB address into 16MB of RAM in 32 bit. But the LC and a couple of others are 16 bits, which would make a 4MB address into 8MB of RAM in 16 bit. Thus the 10MB RAM size in an LC is just in 16 bits. If the bus can be expanded to 32 bits, it increases the RAM size to double! Since finding the Classic II and comparing it to the SE/30, there is very little difference between 16 bit Classic II and the 32 bit SE/30. The SIMMs share many lines. Thus is one can pull out the lines into a separate board to add RAM into the missing 16 bits, I believe one can expand the RAM to double on these machines. Looking at the Classic II, there are 4 - 4 bit X 1 Meg Chips - 44C1000-8, giving the board 2 MB in 16 bits. On a separate board with 4 more 44C1000-8, and have them share all but the Data Bus Lines and then line up each data bus line to the missing bits, you have just increased the RAM from 2 MB in 16 bits to 4 MB in 32 bits. Doing the same with 2 added SIMM sockets on the same board, you can now increase the RAM on the Classic II from 10MB to 20MB! Question is, would ROM Routines stop this? The ROMs themselves are in 32 bits - 4 - 27C010 EPROMS on my board; each 27C010 is 8 bits wide. 4 X 8 is 32. This is also true with the LCs So the question is, can it be done? In theory it can. In my mind I believe it can. So I provide a simple diagram from which a board can be drawn up. If you think that it can't, explain what you know. Don't just say that it can't, prove from what you know why it can't. Given time and money I will try to build such a board and try it on the Classic II. If successful, then I can design and create another for the LC's.
  6. Teraforce88

    LC II motherboard

    From the album: Teraforce88's LC II

    My LC II motherboard with what appears to be leaky capacitors; the board boots and works except the video output has some corruption (thin vertical lines that become closer together as you increase the bit depth/color count).
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