I pulled out the KAT100 PIC chip and re-inserted. No change. I can confirm that transition ARE reaching Pin 40 on the KAT100 PIC chip. I see roughly three bursts. Two come shortly after turn-on, the third comes a second later.
I think you’d need a storage scope or logic analyzer to reverse engineer the AUXBUS. I don’t have that kind of equipment available. > On Aug 5, 2018, at 7:02 PM, Don Wilhelm <donw...@embarqmail.com> wrote: > > Bill, > > If it were a bad PIC chip, the results would be consistent. Reseat the KAT100 > firmware Ic to clear away oxidation. > Look for a flaky connection on the Control cable - at both ends. > > There is not much that you can diagnose with a 'scope other than to determine > that the chip is getting transitions to it. > If you want to reverse engineer the K2 AUXBUS, then you could make some > determination of the AUXBUS correctness, but that is a difficult exercise in > futility IMHO. > > 73, > Don W3FPR > > On 8/5/2018 5:36 PM, Bill Coleman wrote: >> Jack screws appear to be tight on both ends. >> >> After I cycle the power 6-12 times, it will eventually come up. I wonder if >> I have a bad PIC chip in the KAT100. I may try an older version of the >> firmware, I think I have one. That will take a few days. >> >> I can put a scope on Pin 40 of the PIC chip. I see transitions. Anything I >> can diagnose with a scope? >> >> > Bill Coleman, AA4LR, PP-ASEL Mail: aa...@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
