Anybody have (or know where I can get) wiring diagrams for a Mac Plus Extended keyboard?
I have one that's just a doorstop; other keyboards work fine with the same Plus / cable, but this one does nothing. I'm specifically curious about how to test that big microcontroller. (Would I need, like, an oscilloscope app?)
The contacts grid seems to check out alright, so I think the traces on the board are ok (a few scuffs and scratches but continuity is good.)
I replaced the two barrel caps; the resistors checked out ok, per my multimeter. Resoldered everything else just 'cuz.
I've read that if they're unplugged/plugged back in during operation, or used with an incorrectly wired headset cable, they can very rarely get fried - is there any deeper info on what happens when that occurs?
TIA
I have one that's just a doorstop; other keyboards work fine with the same Plus / cable, but this one does nothing. I'm specifically curious about how to test that big microcontroller. (Would I need, like, an oscilloscope app?)
The contacts grid seems to check out alright, so I think the traces on the board are ok (a few scuffs and scratches but continuity is good.)
I replaced the two barrel caps; the resistors checked out ok, per my multimeter. Resoldered everything else just 'cuz.
I've read that if they're unplugged/plugged back in during operation, or used with an incorrectly wired headset cable, they can very rarely get fried - is there any deeper info on what happens when that occurs?
TIA
