Casey, I believe we went through slowly turning the encoder shaft while looking at the voltage changes on the ENC A and ENC B signal lines when we were checking before - if not, let me know and I can give you the instructions and expected results.
There is another line on the front panel that could be the problem cause - that is /ENC RD which must go to zero to read the encoder - but it does that only in short negative going pulses. You will need either a 'scope or a logic probe to check for those pulses, they are too short to detect with a DMM. Should the pulses not appear, my best guess for the cause is a bad output at Front Panel U3 73, Don W3FPR On 6/16/2012 6:50 PM, TI2/NA7U wrote: > Yes, it's been five months or more since I posted about this problem. If you > read through the thread Don W. surmised from a great distance that there was > a short in the main FW chip and recommended a FW upgrade. Well, two months > to get my hands on it, then 3 months to get my hands out from under my butt, > ... and I finally installed the FW upgrade today (2.04R and IOC 1.09. > > Yet, the problem with the encoder persists. Haven't gone through all the > voltage measurements again, but I'm wondering if I'm on the wrong tack? > > 73, > > Casey, TI2/NA7U > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
