This would appear to be related to something connected to the amp either
by the RS-232 port or the AUX port. To verify if it is internal,
disconnect one or the other or both. Troubleshoot by progressive
isolation, otherwise, one step at a time. Be suspicious of anything
which is or may be communicating with the amp. If nothing is
connected, an if the problem appears, it would likely be internal to the
amp. If it does not re-appear then it is something external.
While it is nice to have our stations fully automated and controllable,
my motto is; "more crap = more problems". I suppose it is just how
much crap one is willing to endure. I prefer to keep my life simple
and minimize issues. Which says less crap = less problems. Mine is
connected to my K3S via the AUX communications port. I've found that
to be 100% reliable. I also have a RS-232 to USB converter connected to
the RS-232 {PC} port with no issues.
73
Bob, K4TAX
On 2/13/2020 9:04 AM, VO1HPFrank wrote:
I came in the shack yesterday and the KPA500 screen was lit with MCU LOAD
message. I did not leave the amp on. The amp was on when I arrived. I
updated the firmware to the current release. This morning the same thing
happened. When MCU Load message is on the screen none of the front panel
buttons are active including the POWER. Have to unplug to reset.
What is happening. ? How can I clear this from happening?
Frank VO1HP
--
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