Recent content by dschnur

I recently got a nice looking vintage Apple 16" Color Monitor that had been in a hot garage for the past few decades. It had obviously been used quite a bit, but the tube has no burn and the case is in nice shape. After cleaning it and giving it a cursory inspection, I powered it up and...

Yes I have. I've been chasing down broken traces for a while. Mine has the same double bus fault. I've followed all the data and address lines, and they are good as are all the clocks and rails. I even replaced the obvious GAL, no luck. Next step is looking at all the vcc's on the CPU and...

How do you get them apart? The AWS locks are all metal and there's no obvious way. On the manufacturer web site, they say they can't be rekeyed.

I'm out of them, but have some ongoing searches in the usual places. If I find any more, I'll make sure to tell you.

So, the long and short is this. The lock is assembled at the factory and cannot be re-keyed without destroying it. Post a picture of the key you have. I *might* be able to get another 900 series lock without a key and I know what the one it uses looks like. Also, post the key number...

If it's for the hard drive and you are using a 3.5" drive, then the same one that the SE and SE/30 uses will work. I am actually shy one for the floppy drive, but that's also the one that will work in those machines too.

A little late, but better than never. I just bought a Quadra 950 that came with a Precision Color 8-24X and it had ROM v 1.3.1. See attached, it's still a 27c256.

Ouch! I can see why. At least it's easy to fix. Attached images are some of the trace repairs I had to do on my system. After this, I scraped more rot from other traces and tinned them to protect what copper remained. I'll eventually clean it up the rest of the way and hit it with a...

UB2 on mine had the same damage as yours, though yours was a little further on. Mine also had the typical damage to traces near the battery. I wound up doing a fair bit of microsurgery to fix those and also had to scrape a lot of resist on neighboring traces to remove corrosion, then I tinned...

There are a few common failure modes to aluminum electrolytic capacitors. Heat buildup, over current, age breaking down seals, and poor quality are some of the modes most of us have experienced. That said, there is one failure mode that's not so obvious, and keeping a capacitor in a cool dry...

.01mm magnet wire, lots of flux, and clean solder. You can also just run a jumper wire from the via behind the button to the pin on the chip once it's soldered back in place. Make sure you test from the pads on the audio chip to the destination pads (where ever those may be) to verify the...

One more thing. Make sure the contacts in the audio jack are working. There are slider contacts inside the switch ( you need to remove the switch to get to them ). Those contacts can get gummed up and if they are not working, you have no audio. Try it with something plugged into the jack and...

Check it with a meter. That's the best bet.

For something like this, I normally remove the chips in question, clean the pads, then take a meter and check from pad to via, or from pad to destination pad of another chip. I find that it's pretty common to have a hair line crack right between the pad and the trace. Often they are small...

I thought of that too. You can buy blank keys and they are pretty standard locks. The thing that strikes me most about these is that you can remove the outer ring, then design and 3d print a new one that would fit Quadra series machines. As for wiring, that's pretty basic. If anyone wants...