Recent content by Callan

Looks like I got my 8*24 just in time! Awesome work! Amazing after sale service! too! 😁

If the via has been bathed in acid for any amount of time, it's probably the only way to do it (please let me know if anyone knows a better way!) It's dang near impossible to get solder to flow once it's been acid damaged. On Simm sockets I've had good luck scraping the top 'affected' solder...

As do I. It seems like you have your answer. You can never have enough macs! 😁

Scary how our two collections look pretty much the same minus the se and duo (and an 8*24 which i realllly want to get from you l, but I've been good) Have you given yourself any criteria for thinning the herd? That usually helps me decide. Do I use it? Can I find another one as nice if I...

Yup. Same analog boards in both machines.

Here is the gear. https://ebay.us/m/zWp3Uo As for a video on how to change it. There are a number of videos by different creators. Here's one by Adrian. Enjoy!

Will do. I'll send you a copy If you'd like.

Yeah. Sounds like you need an RGB to HDMI Here is the github that explains it. hoglet67/RGBtoHDMI: Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI · GitHub https://share.google/KuwZ5ieGRWKPoXH1b

The headphone jack feeds back to a tl071 and 2 transistor (amp). These are located rght below the vram / above the sony chips. As finkmac said, I'd check connectivity from the headphone jack to the op amp and make sure your parts test good.

Did it fix it?

It's on page 8. Here's a pic of it, and here is a link to the full bomarc se/30 schematics. http://absurdengineering.org/library/MASTER%20Schematics/Schematics%20-%20BOMARC/Macintosh%20SE30%20Schematic%20(BOMARC)/BOMARC%20SE30%20Schematics.pdf

Check the drive transistor on the underside of the floppy (b7). It'll be close to the plug going to the eject mech. I had this same issue with one of my drives and this was what caused it. You can find a copy of the schematics in the se/30 schematics done by bomarc.

That or you have an intermittent. That's why I mentioned checking for tarnished chips (blackening of legs). A lot of chips from that era have silver legs and will tarnish, causing an intermittent (just by temp differences) or outright breaks. I've also seen quite a few bad sockets from that...

No worries... I haven't worked on a iie in a while, but this is what I'd check from your symptoms. First off... 9 times out of 10 it's always been the ram in my repairs, but if not that... My first basic check would be to look for any tarnished chips since it's been sitting a while. My next...

It sounds like it might be the power supply. Have you checked the voltages? Sounds like you're getting good 5v on cold boot, but degrades as you use it. It could be (probably is) your power supply caps are are ready for some new ones.