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Recent content by VintageTech

  1. V

    How do I remove an programmer key aka reset switch?

    Ok, thank you. I hope the switch dosent crack.
  2. V

    How do I remove an programmer key aka reset switch?

    I just got an defective Mac Plus with a programmer's switch. I guess I have to remove the switch before I crack open the case. The switch seems to bit fragile. I there a way to remove the switch?
  3. V

    Mac 512k analog board problem

    I lowered the resistance of the R 11 (R8 sketch above) by 20 Ohms). BU 406 still getting hot.
  4. V

    Mac 512k analog board problem

    The CRT is working. The picture is good. I replaced the bu 406 with a cheap china version (have a little foldover on the right side. Should have keept the original Fairchild on the board). The Flayback is working working. It came from a working SE 30 analog board. There is no special noise...
  5. V

    Mac 512k analog board problem

    I recently got a not working macintosh 512k. I replaced all electrolytic caps and the mac was running again. My happiness didn't last very long though. The housing got very hot at the top of the Q2 (International 230v) during operation. I therefore assumed a defective Q2 BU 406 and a defective...
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