Originally Posted by Jeremy5848

I just removed my cc "brain." In the 1985 300DT (123) it is attached with two Phillips screws. One was possible, the second I could not even see, much less get out. I finally bent the tabs of the aluminum box and carefully slid the pc board out, leaving the box in place.

Only problem since is that I can't find anything wrong with the board. It's clean, with no cracked traces or fried components. There are some small electrolytic capacitors that I'm gonna test as they sometimes go bad. (My unit works but is flakey -- it drops out for no reason from time to time, or sometimes refuses to work at all. Once it stuck in "accelerate" and I had to manually shut it off as it was gonna speed up forever.)

I plan to check and clean all of the cables and connectors in the system, see if I can find the source of the trouble. I hate to spend big bucks replacing the "brain," especially it it turns out not to be at fault.

By the way, the pc board is full of American-made components, including several amplifier chips made by my former employer, National Semiconductor. I'm doomed!!!

Attached for the curious is an image of the pc board.

Jeremy in Santa Rosa, California