Please try the procedure described in KX3 Utility Help, Troubleshooting, MCU Load failure. The page is titled "MCU Boot Loader Troubleshooting". It describes a procedure to recover from interrupted firmware loads. One of several steps suggested include rebooting the computer to start the USB device driver from a known state. There are other important steps as well.
EEINIT has to do with clearing the microcontrollers' EEPROM. The microcontroller we use stores firmware in one memory space (the "program memory") and EEPROM is a different area entirely. EEINIT does not influence the program (firmware) store. The "program memory" is changed by the firmware load process. EEPROM is changed by EEINIT and by normal operation of the radio. Loading firmware doesn't change EEPROM. (But the new firmware does immediately read that EEPROM on startup). The front panel steps needed to perform EEINIT depend on program code in installed firmware, so it's reasonable that you wouldn't be able to perform that procedure without proper firmware installed. 73 de Dick, K6KR -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Randy Diddel Sent: Sunday, November 16, 2014 8:44 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KX3 bricked by F/W upgrade attempt Hello Elecrafters, First of all let me say that I have RTFM, and RTFHF (read the freaking help file) before posting this. I have read many digests both from here and on the Elecraft KX3 Yahoo group. Greg (K2UM) has the same issue and so does one other person (call, name uncertain). So, I am posting this here in hopes it has happened to someone and they have a solution. In an attempt to update to 2.25, the MCU load failed. If just froze during the process. After waiting a reasonable amount of time (20 minutes) to complete,I closed the Utility and tried to manually restart the KX3. No luck. I don't have batteries in my KX3 so I pulled the power and then tried to bring up the radio. "MCU LD" still stuck on the display. Tried the hold power buttons down for 10 seconds and all that outlined in the Help topic in the KX3 Utility. No luck. As a last resort, I figured I would just EEINT and reload config file or re-calibrate. The radio will not EEINT. I have left power off overnight and tried many steps to revive it this morning. I will mention that I had the PX3 in line but not on. I now know to update all firmware with the USB cable directly from computer to radio. Unless Wayne, Eric, anyone else has any ideas, it looks like I may have to send the rig home for repairs. Thanks, 73. K5RHD /randy ______________________________________________________________ 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 d...@elecraft.com ______________________________________________________________ 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
