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Any way to replace 5160/5161 power supply?

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    #46
    Originally posted by evildragon View Post
    ...So yea, I do recommend a temperature controlled iron, but in the cases of where the solder pads are already missing, you're in a whole different ball park.
    Thanks for posting the video and these pictures btw - very interesting to see this type of damage. As for the missing pads, even then the temp.controlled station is the way - that chunky wire and large PCB traces can suck away the heat from a cruddy 15W Weller Special preventing the solder from running properly into the wire/joint. In my experience, anyhow

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      #47
      Originally posted by pearce_jj View Post
      Thanks for posting the video and these pictures btw - very interesting to see this type of damage. As for the missing pads, even then the temp.controlled station is the way - that chunky wire and large PCB traces can suck away the heat from a cruddy 15W Weller Special preventing the solder from running properly into the wire/joint. In my experience, anyhow
      Only soldering stations allowed here, none of those plug in things with no knobs, haha.
      I honestly have no idea what the max temp of my soldering station is, but I sure wouldn't use the max, that'll lift pads quicker than you can say "crap!".

      I used fat wire though on purpose. I thought about using a thinner wire to keep it more neat as possible, but really, this is high voltage areas that got damaged. I needed to use a heavier wire, so it was really about function rather than looks.

      You can also see though in the 3rd pic, how some of the other solder points are extra shiny. Those were reflowed with some new solder added. If it looked like it "may" be bad, I just played it safe and gave it new solder.
      IBM PS/2 Model 25, NEC V30 8MHz, 640KB RAM, ATI VGA Wonder XL, 2GB SSD, Ethernet, DR DOS 6/GeOS, Xircom PE3 Ethernet

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        #48
        Nice job!Excellent photos and video!

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          #49
          Originally posted by Trixter View Post
          Alls well that ends well:

          [ATTACH=CONFIG]12020[/ATTACH]

          I believe someone (bettablue?) is running some sort of 5161 owner's database, but I wasn't able to find it in the forum (searching '5161 database' breaks the search functionality)...
          That photo is so confusing, haha. Which ones the 5161? And are both monitors on the same computer?
          IBM PS/2 Model 25, NEC V30 8MHz, 640KB RAM, ATI VGA Wonder XL, 2GB SSD, Ethernet, DR DOS 6/GeOS, Xircom PE3 Ethernet

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            #50
            The one with dual hard drives is the 5161 expansion unit; the one with dual floppies is the 5160. The color monitor is connected to the 5160 and the MDA is in the 5161 (ie. each sits on top of their respective card placement).

            I arranged cards so that if I wanted to work without the 5161 turned on, I could (the fan is noisy, I might replace it). Without the 5161 turned on, I get an 1801 (or 1861?) error on boot, but that's just the extender card saying it can't reach the receiver card. Press F1 and boot continues normally.

            To blow your mind even further, here's the full setup with the third composite monitor attached:

            02240004.jpg

            This is my CGA graphics code running on the CGA and composite monitors, with the source/IDE/debugger running on the monochrome monitor. From April to September I'll be overhauling my graphics library for a display I'm putting together for VCFMW.
            Offering a bounty for:
            - A working Sanyo MBC-775 or Logabax 1600
            - Music Construction Set, IBM Music Feature edition (has red sticker on front stating IBM Music Feature)

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              #51
              Originally posted by evildragon View Post
              That photo is so confusing, haha. Which ones the 5161? And are both monitors on the same computer?
              I think the 5160 is on the left with the 5153 driven by a CGA card and the 5161 with a MDA card driving the 5151 mono monitor. My question is, how are the two monitors able to display different images at the same time? I thought that only one monitor would be active at once with this setup?
              Last edited by ibmapc; February 24, 2013, 02:08 PM.

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                #52
                Originally posted by ibmapc View Post
                I think the 5160 is on the left with the 5153 driven by a CGA card and the 5161 with a MDA card driving the 5151 mono monitor. My question is, how are the two monitors able to display different images at the same time? I thought that only one monitor would be active at once with this setup?
                MDA works at a different memory address to the colour cards, so unless you intentionally clear the memory then there is no reason for it to go blank.
                The little dual screen trick was quite handy at times - especially if you needed a reference table (for a game or whatever) and didn't have a printer hooked up.
                Twitter / YouTube

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                  #53
                  How would you get them to show stuff though, if your in a CGA game? How do you pull up something on the MDA? I would think if you say opened up an app for MDA like a text editor, when you quit, it would go blank and whichever display had the DOS prompt, would be the only one to show a prompt.
                  IBM PS/2 Model 25, NEC V30 8MHz, 640KB RAM, ATI VGA Wonder XL, 2GB SSD, Ethernet, DR DOS 6/GeOS, Xircom PE3 Ethernet

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                    #54
                    There may have been utilities for doing this explicitly, but it's really easy using just DOS:

                    Code:
                    REM switch to monochrome screen being active
                    mode mono
                    type cheats.txt
                    REM switch to color screen being active
                    mode co80
                    REM mono screen is NOT erased!  Still shows prior contents!
                    mygame.exe
                    Adventure game walkthroughs are a good reason to try this

                    I actually use them for what they're meant for: Debugging. I run "turbo /d" while color is active, and the Turbo Pascal IDE shows up on the monochrome monitor. I can then write code, single-step through it, watch x86 registers change, etc. all while my graphics code is producing graphics (or gibberish) on the color screen. Turbo Debugger supports this too but the command-line is different.

                    Lotus 1-2-3 supported dual monitors; work on your spreadsheet in mono while generating graphics in color. Tweak a number, see the graph change.

                    Sadly, I can't think of any other software for x86 that used them effectively -- surely there must have been more, but I didn't focus on applications much in the 1980s.
                    Last edited by Trixter; February 24, 2013, 04:05 PM.
                    Offering a bounty for:
                    - A working Sanyo MBC-775 or Logabax 1600
                    - Music Construction Set, IBM Music Feature edition (has red sticker on front stating IBM Music Feature)

                    Comment


                      #55
                      Originally posted by evildragon View Post
                      How would you get them to show stuff though, if your in a CGA game? How do you pull up something on the MDA? I would think if you say opened up an app for MDA like a text editor, when you quit, it would go blank and whichever display had the DOS prompt, would be the only one to show a prompt.
                      One detail I wanted to add was that when I used it in practice (exactly as per Trixter's post) I'd make a text file of about 20 lines with the stuff I needed. So TYPE would leave the entire contents on the screen. It sounds fiddly, but I didn't have a printer, so it was a godsend!
                      Twitter / YouTube

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