[Elecraft] KX3 stopped answering to serial commands

[Holger Schurig]

Follow up: the KXUSB3 cable was faulty according to QRP Project. Got a new
one, now everything works again.

2016-09-07 0:05 GMT+02:00 iain macdonnell - N6ML <ar at dseven.org>:

> On Tue, Sep 6, 2016 at 9:25 AM, Holger Schurig <holgerschurig at gmail.com>
> wrote:
> > - yes, it echos back one character at a time, like I'm typing
> >
> > - yes, it echos back even when I enter random characters.
>
> Does the echo happen if the KX3 is connected but not powered on?
>
>
> > I opened my KX3 and removed the the shielding (Battery retainer). Then I
> > measured at J3 (ACC1). Imagine that the ACC1 is positioned towards the
> left,
> > then the lower-right and the right pins of J3 have a connection
> according to
> > my Multimeter. But I think that is the switch that is inside the socket.
>
> Yes, I see the same thing, but only when there is nothing plugged in.
> The schematic shows a switch connected to (unused) pin 4.
>
> A simpler test might be to use a stereo audio cable, plugged into ACC1
> - measure between the tip and ring at the other end. I see a few
> M-ohms there in both directions...
>
> 73,
>
>     ~iain / N6ML
>