Hi Don, Replacing the resonator had no effect. I ordered a new Filter Board IC which I received today.
Now everything works as supposed to and I was able to finalize alignment and Test Part 1. Now I am off building again. Thanks for your help! 73 de DG5WJ - Benny ———————————————————————— Mail: [email protected] > Am 23.12.2014 um 21:54 schrieb Don Wilhelm <[email protected]>: > > Benny, > > The voltage at U1 pin 16 may be OK - that is one of the resonator pins and > can be loaded by your DMM. That is what makes it read as unstable. > > For some reason, the K2 MCU is not communicating with the band board firmware. > Check all the soldering again, and if that does not resolve itself, obtain a > replacement filter board firmware IC *and* obtain a replacement resonator > (Z1) just in case that one is defective. > If you happen to have a spare 4 MHz resonator on hand, try replacing Z1 - > that could possibly be the entire problem. You never know until you try it. > > 73, > Don W3FPR > >> On 12/23/2014 12:53 PM, Benjamin Schmid wrote: >> Hi Don, >> >> thanks for your help. >> >> I did the troubleshooting steps: >> - Turning the K1 off and on again -> no effect. No relays clicking on >> startup. >> >> - FIL-U1 is installed correct (notch to the rear), no bent pins, checked the >> soldering of the socket. >> The manual states that FIL U1 may be defective. I just wanted to clear out >> other possibilities before ordering a replacement. >> >> - With power on I checked the voltages at FIL U1 and FP U1 according to the >> voltages table. >> All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 >> Voltage is unstable between below 0.3V to 1.6V >> All MCU voltages are within range except Pin 6. Just measured 1.9V there >> should be 2.5V >> >> Power consumption is at 66mA with no audio output and the LCD backlight >> (bright version) installed. >> >> Thanks again for your time. >> >> >>>> Be certain all pins of the headers to the filter board are well soldered. >>>> If the band board firmware (U1) is plugged in backwards, you will have low >>>> voltage on pin 16 and the regulator will get hot. The notch on U1 must >>>> point toward the rear of the board. >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > ______________________________________________________________ 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 Message delivered to [email protected]
