logic board

I obtained this schematic from someone else but will avoid naming them for now. I am very thankful to have obtained it; 2but honestly, it's not a very good scan. All the gray parts are very hard to read. But everything other than that is quite good, and you'll find it useful when diagnosing...

Starting with this post, I found that Snooper 2 has some interesting motherboard photos, worthy of extraction. If you follow that discussion, you will see that it concluded with the finding that we cannot extract them from the PICT resource of the Snooper app. The only reasonable method of...

Hello! :) I tried to find if there was a thread already here on Tinker Different about this but have not. Some people did talk about it elsewhere, though. So, here I go. I understand that many like to keep the Compact Macs the way it was back in the day. On the other hand, I want to give them...

I have seen several examples of using CR2032 battery holders as replacements for dead half-AA on compact Macs. Using this type of battery has been working fine for me on the SE/30, SE, Mac Classic, and I assume there are other systems that can use this solution as well. This is not news to most...

I purchased this Mac 128k logic board knowing it wasn't working. I've poked at it a little over the last 6 months, which includes: Building a 4164 DRAM tester and testing the original DRAM. I found 2 were faulty but ended up replacing them all. Swapping the LS166 @ F14 & F15 (example board...

As with the Macintosh SE, many Classic's have died because of Apple's short sighted decision to add a battery to the board - and unfortunately a particularly explosive one at that! This will inevitably pop and causes a horrific amount of damage. Thankfully, because i've done this before, with...

So many classic macs, starting with the SE, have died because of Apple's short sighted decision to add a battery to the board. This inevitably leaks and causes a horrific amount of damage. Luckily - most of the custom chips survive even this, so I decided to make a near 1:1 reproduction of the...