[Elecraft] KPA1500 Fault:LPF VMON

[charles respess]

Thank you Chuck, Mark, Pete, Dick and others for the information.

Based on everyone's feedback I will submit a request to
support at elecraft.com 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 <k4qs1 at yahoo.com> 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 <
> charles.respess at gmail.com> 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
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