Recent content by danpoarch

Brilliant!!! Thank you @Bolle!!! For those that aren't avid following these threads (I mean, why wouldn't you be...) I picked one of these up in Germany and a friend shipped it. Other thread:

Oh say lookee here. I bought this auction through a coworker in Berlin. He’s an Amiga guy so buying a dusty vintage computer part on eBay on my behalf was a no brainer for him. It took three months for it to get here. I’m kinda already in love with it. It has the same/similar PCB fab technique...

Received a note from another forum member and they recommended removing the cache, as that solved this same problem for the recently. This did not work for me. I'm off to the Trading Post to give this away.

Interesting thread. I have two of these expansion units (only one NUBUS host card tho). I've been slowly collecting all the pieces for the past 4 or five years. There is a way to archive the floppies and use them to authorize PTIII and Sound Designer. I've attached a screenshot of some apps I...

Still chimes. No video. I put a jumper on the VGA enable pins and switched to pure VGA video and still no image on-screen. Odd that it chimes but no clicky from the hard drive(which spins up) and no video. Not sure I'll continue to test this and may just sell it. Bought it to put one of my...

I got a powerCenter off of eBay that has a MaxPower CPU in it. When I power it on I hear a chime but I don’t see any video (LCD or CRT) and I don’t hear the hard drive chirp away. Haven’t tested the hard drive because I get no video even when I disconnect it. Reseating the CPU, cache, RAM and...

On the Micron Xceed docs: I've reviewed some of the code in the .sit file and while I know a little Moto assembly from school, most of what's happening would require a lot more analysis to understand. However a couple things are crystal clear, the files in the includes list are not included in...

For anyone needing to map broken/disappeared traces on a Mac IIci, I cleared off everything in the serial/sound area. Note that some of my traces between UA4 and RP1 are shot to sh!t.

When you discover that the 15-pin is not showing any video and appears mangled by cap leakage, try falling back on the composite video out. This saved me some heartache on one of my 660AVs. Never have gotten the proper video port to work but I just use the composite if I need to bring it up. I...

Thanks! I keep looking at the sound circuit thinking, “I should really rework and clean those, but... time already invested >> resale value...” but that never stopped me on my other Macs...

Figured it out: 4420P-601-250/201 This is based on the idea that it’s the same basic need as the SE/30 filters which are: 4120R-601-250/201 Note: the IIci are SMD, the SE/30 are through-hole. Both are end-of-life and are non-stocked. So if you see them, buy them.

That sounds like something I saw on Mouser. I will update the thread with a part number of that works out. I’m enjoying the challenges these two boards are giving me but I’m getting a little burned out by all the trace repair. Especially when the other one worked when I decided oh hey I...

While I’m feeling chatty, I already rebuilt the power circuit wIth shiny new ICs. New Q3, Q4, 7474, and 2x 74132s. And yeah, I crammed some oversized solid-electrolytic 10μf smd caps on there for good measure.

Also, if you have a Mac IIci, this repair is not for the rookie, nor for the impatient. These things are filthy. On both my boards nothing but grit has bubbled our from under these and the 75175 transceivers. Numerous broken traces once the chips are removed and the areas are cleaned. You may...

Looking at replacing the Bourns filters in my Mac IIci’s. They meter pin-to-opposing-pin at 45ohms but that may not be an accurate read because it’s an RC filter. Which I have to assume it is... but... I can get any kind of data sheet From the numbers on the top of the case. I’ve replaced the...