Agreed. It's a workaround, not a fix.
On 11/26/16 6:38 PM, Bill Johnson wrote:
That is usually a technique for determining a board or component issue. Been around a long time. You have a component issue. Good luck. Me, I would send it to the factory for troubleshooting. 73, Bill K9YEQ -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Andrew Siegel Sent: Saturday, November 26, 2016 3:49 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] [K3] Workaround for FPF Firmware Load Failure: Cool it down in the fridge first My K3 (s/n 6000+) has developed the FPF Load failure problem: the K3 Utility times out after a few minutes when trying to update the FPF firmware, leaving "FPF Load" showing on the K3 display, and leaving the K3 unusable. This happens on Windows, Mac, and Linux, using three different high-quality USB-to-serial adapters: Keyspan USA-19HS, Tripp Lite U209-000-R, and Plugable PL2303-DB9. I can upgrade the MCU and DSP firmware without a problem. The FPF load fails regardless of the version of the K3 utility I use, the version of MCU or DSP firmware already installed on the K3, or the version of FPF firmware that I am attempting to install. In a panic after seeing the FPF load failure just before this past Field Day, I came up with a workaround that has worked twice now: ==> Put the K3 in the fridge for an hour or two before doing the FPF firmware upgrade. On my K3, the FPF load fails when the front panel temperature is even at my relatively low house temperature of 19C (as displayed on the front panel). The longer the K3 has been powered up, the warmer the FP gets, and the less time it takes for an FPF firmware load to fail. When I activate View->Trace in the K3 Utility and watch the serial interaction under these conditions, I observe that the rig starts taking longer and longer to acknowledge packets sent, until finally it stops ACKing completely, at which point the utility gives up. When I refrigerate the K3, the reported FP temperature drops to 9C, and the FPF firmware load works reliably. There are no dropped ACKs. Your mileage may vary; refrigerate your K3 at your own risk, and definitely do not freeze it. 73, Andy, N2CN ______________________________________________________________ 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 k9...@live.com
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