68kMLA Classic Interface
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| Click here to select a new forum. | | Classic Analog Board Voltage Testing | Posted by: JustG on 2020-06-07 08:17:42
Hey everyone,
I'm having some odd issues with a Classic that I recently recapped the logic board. I have a sneaking suspicion that the analog is outputting incorrect voltages and I'll need to replace capacitors there too. I'd like to test it first. Can I safely apply power to the board with it disconnected from the CRT and logic board?
Is there a pinout of one of the two connectors (hard drive or logic board) for voltages?
Thanks!
G
| Posted by: rplacd on 2020-06-07 15:26:14
Yes! A pinout for the hard drive port is available on pages 162-163 of http://www.maccaps.com/MacCaps/Repair_books_files/Mac Classic %26 SE Repair and Upgrade Secrets.pdf, and for the internal logic board connector at https://old.pinouts.ru/Power/macclassicpower_pinout.shtml (although I'm not sure how each pin is numbered, though, I think they start at 1 on the bottom left with the plastic "clip" on the top, and go counter-clockwise?)
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