Thank you Chuck, Mark, Pete, Dick and others for the information. Based on everyone's feedback I will submit a request to [email protected] for next steps. Definitely appears to be some kind of critical failure with the LPF board regarding Transmit / Receive PIN Diodes and related control voltages. Unit is 4.5 years old and this is the only problem I have had thankfully.
73, Charles - AC1FC On Fri, Oct 21, 2022 at 11:04 AM Chuck Stover <[email protected]> wrote: > I had one of those a year or so back. It resulted in a trip to > Watsonville for the KPA1500. > > Can't find the paperwork right now, but as I recall it was a failed PIN > diode. > > 73, Chuck K4QS > > On Friday, October 21, 2022 at 03:40:21 AM EDT, charles respess < > [email protected]> wrote: > > > Hello, > > Does anyone know how to troubleshoot KPA1500 Fault:LPF VMON? > > Amplifier powers up fine into standby mode, however any attempt to change > into operate mode causes this hard fault condition 'Fault:LPF VMON'. I > searched archives but found no details on how to troubleshoot. > > Charles > ______________________________________________________________ > 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]
