Latest Trade: Mac IIci and others

[ilitch64]

I am very excited! It has been a great year for collecting Macs, I just traded a TRS-80, a Two Page Display, an Apple II+ setup, and an Apple IIc all for a book on Pascal, a PowerBook 190cs an LC II, a portrait display, and a Macintosh IIci!

 
It’s not all perfect though, the IIci’s NUBUS slots aren’t functioning properly. The previous owner did recap it. The LC II is in dire need of a recap that’s on my agenda today. The PowerBook is missing the charger too, and my 165 charger doesn’t fit it even though it’s the same voltage/wattage. Here’s the display in 4 bit grayscale playing sim city!



I have always wanted this exact setup and I am very proud that it managed to stumble through my door! I would like to thank the members of the forum for helping me when I first started looking for new Macs. I know I don’t post much, but I read a lot and really enjoy the threads I see. There’s a lot that I need to do with this IIci and I will keep updating this as I fix the LC II and get the 190 working. 

 

[Compgeke]

It’s not all perfect though, the IIci’s NUBUS slots aren’t functioning properly. The previous owner did recap it. 

Check on these two chips specifically, the 74ALS240 s. I've had three boards where I had to replace themme to make nubus work again. They're the bus drivers for the slots, so they're reasonably important for the functionality of the slot. The bottom one usually goes first.

 

[ilitch64]

Check on these two chips specifically, the 74ALS240 s. I've had three boards where I had to replace themme to make nubus work again. They're the bus drivers for the slots, so they're reasonably important for the functionality of the slot. The bottom one usually goes first.

You were correct the 74LS240 on the bottom just sorta fell apart went I went to inspect it. Thankfully the traces and solder pads are fine. I was able to clean them and re-tin. I will be ordering the new chip shortly alongside Kapton tape and finer solder.

I also started to organize what I need for the LC II Restoration!

 

[ilitch64]

Update:

I have recapped the LC II, the whine from the speaker is gone, however there are vertical bars every half inch on the screen I will take a picture tomorrow when I have time.


I plan on releasing a video of the recap, but that will come when I get around to actually editing the footage and voiceover together! 


This is the Bus Transceiver from the IIci, it popped off the board when I touched it! 

 

[IIfx]

Recap job doesn’t look good on the IIci. Never was a fan of using through hole parts in a SM application. If it works, it works, but consider redoing it with surface mount polymer or tantalum caps.

Nice portrait display, uncommon find!

 

[ilitch64]

That was the recap on The LC II I got, I think it looks tidy, but I did use what I had. I need to get SMD supplies though you are right. I would prefer to use tantalums. The job the previous owner of the IIci is messy in comparison. 
I’ll post a phot later, definitely wanna clean it up a little.