Thanks Erik! Good catch. I'll order one and a spare.
Update - I just ordered two switching supplies. A spare isn't a bad thing to have since one has failed in each of our units. Those things must have run hot.
Lexicon was near me in Bedford, MA when the RV-8 was developed. They're long gone from here as part of the Harman buyout. I went by their old address to be sure. Gonzo. But maybe some of the people who worked on the RV-8 are around in Lexicon or elsewhere and might have some insight. I'm going to do some digging. I still believe that this must be a known problem. Who knows what it is? I hope to find someone who lived through it at Lexicon.
I have a 4 channel scope. After I get the new power supply in, I'm going to fire up the unit and start looking at what the CPU bus and data lines are doing after a reset. A stuck data or address line will kill the system. If the CPU won't keep running, I may add an external circuit using an Arduino to keep blipping the CPU Reset/ low so I can successively probe the I/O lines after reset to see if any of them look stuck. It's worth a shot...
Update - I just ordered two switching supplies. A spare isn't a bad thing to have since one has failed in each of our units. Those things must have run hot.
Lexicon was near me in Bedford, MA when the RV-8 was developed. They're long gone from here as part of the Harman buyout. I went by their old address to be sure. Gonzo. But maybe some of the people who worked on the RV-8 are around in Lexicon or elsewhere and might have some insight. I'm going to do some digging. I still believe that this must be a known problem. Who knows what it is? I hope to find someone who lived through it at Lexicon.
I have a 4 channel scope. After I get the new power supply in, I'm going to fire up the unit and start looking at what the CPU bus and data lines are doing after a reset. A stuck data or address line will kill the system. If the CPU won't keep running, I may add an external circuit using an Arduino to keep blipping the CPU Reset/ low so I can successively probe the I/O lines after reset to see if any of them look stuck. It's worth a shot...
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