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Xerox 6060 restoration

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    #46
    Update

    Originally posted by Trixter View Post
    Curious if you ever re-laid the PCB and/or got it mounted inside the case -- update?
    Yes! Finally, after a long delay, I took advantage of some spare time over the Easter weekend and I re-laid the M24-ATX power adapter PCB and sent it to JLCPCB for fabrication. They say given the current situation there may be some shipping delays, but the production process itself started this morning. Hopefully I will get them over here in the next week or so.

    Incidentally I also sent for fabrication a few more PCBs (since you only pay for shipping once...):
    • an improved version of M24-PS2 keyboard adapter with more space for a heatsink for the 7805 (turns out the advice from this board was correct and you do need one)
    • an experimental M24-VGA converter (the simple diode-based version suggested on this forum, with intensity control but without the correct CGA yellow - sorry)
    • a very experimental version of M24-IDE, my attempt at a full 16-bit IDE adapter designed for the Olivetti 16-bit bus - it'll be a miracle if this works


    Will let you know once I receive them.

    Comment


      #47
      I look forward to your updates
      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


        #48
        Originally posted by Trixter View Post
        I look forward to your updates

        Me toooo!
        <album>

        Comment


          #49
          2020 version!

          The new version of the M24-ATX PCB has arrived! I have soldered it over the weekend and it works just fine, like the previous one. The angled ATX connector allows for better routing of the cables so I think I prefer this version.

          As for placement, I have drilled holes on the side of the metal enclosure of the original power supply and attached brass standoffs to it. I then attached the PCB to the standoffs. The air gap allows some air circulation and allows access to one of the two screws that secures the power supply enclosure to the floor of the chassis. I think itís turned out quite neat, but it was very fiddly at almost every step (itís always tight for space).

          Here are some photos:

          7A7B8A41-F72E-4F81-8E5D-BACF3A4E7910.jpeg

          6EAF10FB-4B82-4FA8-9E20-FB850EEA5D95.jpeg

          37644910-D16C-48C4-A7F9-C182964AF9AD.jpeg

          708056F2-37F9-4FCD-B2F8-9E36689DCCCC.jpeg

          Comment


            #50
            That is so cool! It looks like it fits completely inside then, not visible from the outside?
            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


              #51
              Originally posted by Trixter View Post
              That is so cool! It looks like it fits completely inside then, not visible from the outside?
              That’s correct - it fits completely inside, the only visible difference from the outside is that the female (slave) IEC AC socket below the power switch is blocked off (where you would normally connect the AC for the color monitor).

              Comment


                #52
                Wait, then what do the external power connections look like?
                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


                  #53
                  Originally posted by Trixter View Post
                  Wait, then what do the external power connections look like?
                  Like the photo below - only the input (male) AC connector remains, the output (female) AC connector had to be removed and blocked off because of space constraints inside the PSU enclosure. The only other difference visible from outside (if one looks very closely) is that the original grey fan has been replaced by a new one which is brown in color.

                  4BA76719-4743-441C-91C0-42807FB6453A.jpeg

                  Ok, if you look REALLY really closely you can also notice that the modified PSU is sitting approximately 1 mm higher than the original one, so the power switch and the remaining input AC connector are not exactly centred in their respective openings of the chassis, but it’s barely noticeable.
                  Last edited by Valerio; April 26, 2020, 05:14 AM. Reason: More details

                  Comment


                    #54
                    Originally posted by Trixter View Post
                    That is so cool! It looks like it fits completely inside then, not visible from the outside?

                    Yes, that's also my thought. Inside of the PSU chassis would be the perfect place.
                    <album>

                    Comment


                      #55
                      Hold on - I think maybe something is not clear in my description. The M24-ATX PCB is bolted to the outside of the chassis of the Power Supply Unit (PSU), so of course it is visible if you open the case of the computer (see posted photos). However it fits completely on the inside of the case of the computer itself, which means it is not visible from the outside when the computer case is closed.

                      Would the PCB fit inside the chassis of the PSU? Probably yes but the cable routing would be extremely difficult and cumbersome, so I am not going to try it

                      If the desired objective is to have an all-enclosed PSU that replicates the original one without anything showing from the outside of the PSU, then I think a different PCB design would be better. Most importantly, one would need to source the exact power connectors that are on the original PSU, which I have not been able to do (or scavenge those from a dead PSU PCB, doable but a bit messy).

                      I hope this clarifies things... ?

                      Comment


                        #56
                        We see that. As long as the position of the different M24-Power connectors is the same order as on the original PSU that's fine and it should be fitable inside.

                        One more good thing: It not only is a benefit for M21/M24/M24SP/AT&T/Xerox owners with bad PSU, but it also seems to fit fine for M28 and M280 PSU!!! I have a bad M280, too.
                        <album>

                        Comment


                          #57
                          During the course of discussion regarding the newly designed PS unit for M24/6300/6060, the circuit board shown in the pictures iis what I want to address here. According to the discussion the board was acquired from China. So my question is why didn't the developer etch his own board rather than going to China for the etched board?

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