On 08/03/2014 09:26 AM, Mark J. Blair wrote:
I had a TM-848 (an earlier belt-drive one) in my
TRS-80 Model 12 that
shorted the 24V supply. That LM7812 was the first thing that I
suspected, but the problem turned out to be a shorted filter
capacitor right before it.
Yup, I've seen that too. It's a lousy design.
--Chuck