User:Akbkuku/projects: Difference between revisions

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== Current Projects Here ==
== Current Projects ==
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{| class="wikitable"
|+Projects and Stages
|+Projects and Stages
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== Completed Projects Here ==
== Completed Projects ==


*  [[Mac Classic II‎]]
*  [[Mac Classic II‎]]

Revision as of 17:18, 6 March 2022

Current Projects

Projects and Stages
Device Next Step Notes
Super Nintendo Replacements
Sony TC-188SD General Tape player that needs belts found
IBM PS2 Order
Olivetti M24 and ATT 6300 Replacements

Investigation Round 1

I don't specifically need caps for this, parts were knocked loose but the video card may be bad.


Power supply had broken solder joints in it on molex power connector and a large transformer.

Investigation Round 2

Video card is not outputting sync signals. CRTC chip is but signal gets held up in SN74S374 . Chip may be bad. Output filter disconnected as part of troubleshooting.


Initially the computer would not turn on, after seemingly changing nothing it came back. There may be more bad solder joints in the PSU. There was no significant ripple on the voltage rails.


Video card can be disabled by pulling another chip and jumpering some of its pad, but the chip is not socketed. If the BIOS was a newer revision it may be possible to disable the video with motherboard jumpers. Then a CGA, MDA, EGA card could be put in for further evaluation of the rest of the system in the short term.


Requirements for further investigation:

  • sn74S374n 20 pin DIP(Need to confirm that chip from schematic)
  • 20 pin socket - socket 11C
  • 14 pin socket - socket 3G/the video disable option
  • ROMs that can be burned to upgrade to a newer BIOS revision
Commodore VIC-20‎ Check Originals Double check cap brands and series (get photos)


Caps will likely not fix the issue I am having but I'm going to get them anyway

Toshiba T1600‎ Order
Atari SC1224 Order
27-3V07 PSU Check Originals Double check cap brands and series (get photos)
IBM 5150 Check Originals The parts listed in the original caps have series that don't seem correct. These should be re-checked and better documented.
Abit BP6 Order I should document the recommended alternate sized caps from bp6.com in addition to the exact replacements
Roland MC-303 Order
Media Vision Pro AudioSpectrum‎ Order Check cap series again to fix axial cap
Ultra XConnect Modular PSU‎ Order Check misread cap value

Completed Projects

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