Recent content by billbucks

Hi, I just found a similar project: Apple2Card

I'd like to try the SmartPort SD to use as an, HD emulator for a 2GS since I have a floppy drive. What firmware do I need for the 2GS and is it now stable ? I looked at Github and I'm not sure which file(s) to send to a maker (e.g. PCBWay) from the Gerbers folder. Any help would be appreciated...

Thanks for your feedback. The suggestion I got won't work so I'll look for a SWIM replacement unless I figure out how to wire some UJ11 pins to remove the error (these schematics can be useful). Attached is my understanding of the SWIM pinout ; is it correct ?

My intent is to remove the error screen and not use the floppy drive on the Mac SE30. If I use the IWM, could it solve this issue i.e. will the Mac SE30 be ok ? I saw @Kay K.M.Mods project which is useful to identify the matching pins between both chips. Shouldn't it be feasible with a DIP28...

Someone suggested I could reuse the IWM chip from a Mac SE board (see photo) which I have. Could it work ? The corresponding pins could be determined from each board's schematics I guess.

Thanks for your input. Attached is a photo of the UJ11 location where the blown chip has been removed. 3 of the connectors have been damaged (see photo) so I'm concerned I might not be able to solder a replacement chip should I find a dead Mac SE30 board ... Can it be fixed ? Whilst I found the...

Update: I managed to test the 2 GS with a friend"s EU PSU, it worked well. The cheapest PSU option I found is from the PicoPSU adaptor from tindie. I also purchased the RAM2GS to have 8GB of RAM. Will post an update once the setup is complete.

Here's an update: I managed to remove the UJ11 chip. The Mac SE30 now starts without any sound/bip and with horizontal lines as on the photo. I'm not sure if this related with a capacitor (replaced 2 years ago) or if another component got damaged. It looks like the Simasinac as on...

Was is the same Astec model ? Is it the one here : https://www.apple2faq.com/apple2faq/convert-us-power-supply-220v/? I opened my Astec 699-0126 PSU and it's not the same model (see photos). I checked the fuse and it's still ok. I wonder what probably burnt having plugged the 110V PSU to 220V...

Hi, I bought an apple ii gs from the US. My mistake when I received it is to forget looking at moving from 110 to 220V :( When I switched the 2GS, I heard a loud noise as I think I killed the PSU. It's the Astec model AAI3581, no 699-0126. On the label it says that the input is 115V so I guess...

Thank you for the information. I believe that the floppy drive killed the chip. I have a hot air station but it sounds like it's not an easy thing to replace, should I find a spare chip to use. I wonder if the motherboard could work without the UJ11 chip on the basis that I don't need a floppy...

Thanks for the link. About the faulty card, I'm indeed keeping as it's always useful to keep spare parts. The chip has a small crack or bubble i.e. it's not flux. Would you recommend to replace the chip ? Is it feasible to do with a common soldering iron ? The issue is that I have to look for a...

Latest update: I bought a spare analog card that came from a Mac SE (820-026-B) to replace the analog card in a Mac SE that I'm trying to fix. The Mac SE analog card was faulty since this one works , yet I found out that the Mac SE motherboard is faulty: when switching the Mac SE, I get a small...

Thanks for the information. I ordered the capacitors from Mouser and will keep you informed of the updates.

Looking at an old photo of the motherboard, the crack seems to have been there before. I can't find at the moment any photo of the CRT Yoke board but if the smell is on this board, should I change the capacitors? Note that I have a spare Mac SE (not 30) which is due to be repaired. Can I switch...