This guy has been interesting. A computer of sorts from 1980. Removed all the boards and started replacing tantalum capacitors one by one. Once the big values were replaced each board came to life and finally the screen came on. The voltages also were correct. Next step is calibration and try to pass the self test..
Thomas and Bjorn have just completed a major work on horn audio history. They have spent the last 14 or 15 years on this tome. I can’t imagine the passion and dedication that went into this book. They literally spent years in research and writing. I hope to meet these gentlemen in person some day as it would be a priveledge.
They just annouced their website with information for the book. I am pleased to announce it will be available on amazon.… Read the full article
Chris and have been working on this guy off and on for a while. There is finally light at the end of the tunnel. Here is a pic of the ancient guts.
With these boards removed we get all the correct voltages. Not so much when they are installed. I started replacing all the orange tantalum caps… Lots of caps.
Fortunately with the input board removed there are some signs of life.… Read the full article