1986 300SDL: CCU parts list?
 

Anyone have a parts list or schematic for an 86 300SDL CCU? I'm going to rebuild mine but some of the transistors' #'s are unreadable. I've already replaced all the capacitors in mine and am building a list of parts as I go but any help would be great, greatly appreciated. Thanks.

Personally, I wouldn't bother replacing the transistors unless you know they have a problem. When you did the caps, I hope you used hi temp (85c or higher) capacitors of a very good brand such as Panasonic or Nichicon. Regular cheap electrolytics will probably not last.

I've never studied the circuits inside the CCU up close, but I would not be surprised to learn that there are a lot of close tolerance parts in there, and possibly matched components. Replacing anything other than caps might be an exercise in futility, or worse.

Yeah, I know about the caps. I haven't done the transistors yet but I am done with all the diodes.

I've done circuit work before so it's not a major hassle for me. There are guys out there refurb'ing them so it's doable. Digikey and Mouser have all the parts so far and I have a few other places for hard to find parts. We'll see how it goes.

I have used Digikey in the past when rebuilding weird items... Servotronic steering in my 750iL for example.

As for a second gen climate head, just look around for a good used one. You can get it for less than $50 usually, surely your time is worth more than $50.