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  1. I uploaded it to the Internet Archive as well,...

    I uploaded it to the Internet Archive as well, hope that's OK alank2: https://archive.org/details/pc6001schematic

    A word of warning: I've noticed that the capacitor values are a little off. I/O is...
  2. I am doing sort of the opposite - strongly...

    I am doing sort of the opposite - strongly considering converting a PC serial mouse to an Amiga quadrature-encoded mouse (because I want a trackball, and because the mouse was sold as an Amiga mouse...
  3. Hope everyone is doing well with their oddball...

    Hope everyone is doing well with their oddball Z80s.

    Since the last post in this thread, I've also picked up a PC-6001mkII with an almost completely non-responsive keyboard. My original 6001 has...
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    Whoa! What a journey. I feel relatively spoiled...

    Whoa! What a journey. I feel relatively spoiled with my Japanese finds - the worst I've had to do so far is replace some shorted tantalum capacitors and hose off battery acid. Do you have any...
  5. On my SX, the stock fan seems to be enough to...

    On my SX, the stock fan seems to be enough to pull the minimum load. The power supply is stable. I just can't replace it with a super quiet 0.035A Noctua unless I added load resistors or a constantly...
  6. On my SX, the technical manual says it needs at...

    On my SX, the technical manual says it needs at least 0.15A, which was sad for me because I couldn't cleanly swap out the super-loud stock 12V "cooling" fan with a 0.035A Noctua. 5V needs 1.25A,...
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    I was going to build a PS/2 keyboard -> Tandy...

    I was going to build a PS/2 keyboard -> Tandy adapter once I got a working machine, as the SX service manual has a lot of detail on keyboard signalling (timing and scan codes). There are probably...
  8. Thanks for the offer! I'd definitely be...

    Thanks for the offer! I'd definitely be interested in the "Light Blue" (U51) custom chip if you've still got it.

    Put the oscilloscope to it today, and all the clock voltages seem too low to be...
  9. I don't know much about the ANS machines, but I...

    I don't know much about the ANS machines, but I know that on Power Macs of the era you can trace the power-on switch from the ADB port (since the keyboard momentarily shorts the "power on" pin to...
  10. I just re-did the caps on my basket-case 1000SX's...

    I just re-did the caps on my basket-case 1000SX's PSU because the C23 (-12V rail) cap exploded on the initial startup.

    Here's my table:

    Cap ID Capacitance Voltage Comments
    C6 680F 200V Mains...
  11. That worked great! I wish I had thought of that....

    That worked great! I wish I had thought of that. Thanks a lot.

    I'll do some keyboard cleanup in the next few weeks and hopefully that will make this machine fully usable again!
  12. It was indeed shorted caps - the tantalums on the...

    It was indeed shorted caps - the tantalums on the 12V and the -12V rail, right next to the PSU connector to the mainboard, were a zero-ohm dead short.

    Lucky for me, the RAM appears to be OK so far...
  13. The 8031 is a huge addition to the already fairly...

    The 8031 is a huge addition to the already fairly large PC-8001. I'm glad my 8801mkII has internal floppies :)

    It looks as though the 8031 will happily work with the PC-6001mkII's external floppy...
  14. Only had a little while to play with it today but...

    Only had a little while to play with it today but found out that the wire going from CN606 on the power supply was not attached to anything. It looks like it can only go to CN12, but the schematics...
  15. I just got a 6001 from Japan myself. All I seem...

    I just got a 6001 from Japan myself. All I seem to get out of it right now when connected to the TV is a white screen.

    I probed the cartridge slot on the side to see if I could figure out if any...
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    I built an adapter for my PC-8801mkII...

    I built an adapter for my PC-8801mkII last year. It is effectively a DIN connector which pipes the colour channels into some 150Ω resistors (to step the voltages down from TTL to something closer to...
  17. Apologies for bringing back a fairly old thread,...

    Apologies for bringing back a fairly old thread, but it seemed pretty relevant. Did this work out in the end or are you still looking into it?

    I have a new-to-me 1000SX that seems to have...
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    Yes, this machine has the exact model (and age)...

    Yes, this machine has the exact model (and age) of those blue Nichicom capacitors that I've had to replace in Lexus ECUs for failing prematurely. I'm sure that's definitely part of the cause, but...
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    Yeah, after I made that post I went fishing...

    Yeah, after I made that post I went fishing around in my parts pile and came up with a working USB floppy drive. Something isn't right with my Catweasel, as it can't even write straight MSDOS 1.44MB...
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    Hi TD-Linux, I am actually in a similar boat...

    Hi TD-Linux,

    I am actually in a similar boat as I just got a 9821AP2 with no hard drive tray. Luckily, mine seems to be able to boot, but I lack the 'right' floppy drive to be able to write images...
  21. No luck with v3.0 after a quick search, but there...

    No luck with v3.0 after a quick search, but there are some resources for v4.0 that you might be able to use to puzzle it out:

    I'm sure you've already seen Ingemar's guide to THINK Pascal 4.5.
    ...
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