Search results

That's an interesting read, thanks for posting that.

Yeah, I think you are right. Sticking a scope on the horizontal sync gives me 32khz or so, which is more like 640*480 60Hz, so I wonder if this card 'defaults' to a VGA type output, rather than 66Hz. The apple doc does appear to be wrong. Either way, it looks like it is 640*480 only, so there...

I've tracked down an original apple press release for it here - https://web.archive.org/web/20101205230251/http://support.apple.com/kb/TA40070 This mentions support for the 12 inch displays, unlike the above matrix you have linked. This suggests that the 'default' is the lower res. I was happy...

I think this indicates what I was suggesting, which is this should work on this monitor. I think i'll investigate the resistor side of things and trace how it determines which monitor is connected in case this is what is failing. As i mentioned, the capacitors on the card were shot, so it's had...

Hi, just wondering if you knowledgable lot have come across this before. I've just picked up another IIcx (i've got a bit of an old Mac problem at the moment), which came with a High Resolution Display card. The machine had the usual dodgy capacitors, dodgy PSU, a dodgy speaker, and a dodgy...

The battery is new and is not the problem. In fact, my strategy for getting it to boot again seems to have stopped working, and I think was a total red herring. I've done some analysis on the bus and things don't look good at startup. I'm not totally sure what things should look like (i've...

Hi, yes, recapped board - replaced the SMDs, checked the electrolytics and they measure fine, so have left those. I've traced the 12v to the two sound chips, UB15 and JA15, and removing these, the machine runs as before with the 5v and the 12v applied. Replacing UB15 and I get the dubious...

I've got a IIcx here which arrived to me with a dodgy power supply, and some corrosion from leaking caps near the battery, but it was pretty solid, and with a little bit of work i got it up and running - all good! However, it has an intermittent boot problem - it would sometimes fail to boot...

Just to say thanks for this schematic - i've been working on a temperamental LC power supply, which was sometimes working with somewhat out of spec voltages, sometimes hiccuping, and sometimes not even starting. It had previously suffered from capacitor leakage, and had various components with...

I've got a IIcx which has a booting problem - I can't work out a pattern, but when it fails to boot, the PSU gets going from the button on the machine or the keyboard button, but there is no boot chime. The fix is to remove the battery, wait 30 mins or so, replace the battery, and then it...