[Elecraft] K3: PTT IN problem - cont'd...

[Guy Olinger K2AV]

Hi, John,

As far as I can tell from the schematic, the PTT_IN jack and the ACC jack
pin 4 are a wire-to-wire connection at Q3 on the KIO3 board.  Power on, see
if both PTT_IN center and ACC jack pin 4 show the voltage to ground for
PTT.  See if the voltage on one drops if the other is grounded.

If not you have a physical path disrupted and you can trace it.  Schematics
are available for download on the Elecraft web site.  In Adobe reader,
using CTRL- F to bring up the search widget, type in "PTT IN" without the
quotes will take you to all the line identifications and highlight them.

73, Guy.

On Wed, Apr 11, 2012 at 8:07 PM, VK7JB <zendoc at netspace.net.au> wrote:

> Hello Again,
>
> Well,  the PTT IN problem persists.
>
> I can confirm that the K3 is not in TEST mode and that the VOX/PTT
> parameter
> is definitely set to PTT.
>
> I've taken the top of the rig and checked that all the rear panel hardware
> is still connected and in place.
>
> PTT on the front panel mic connector and the XMIT front panel button work
> normally.  It's still only the rear panel PTT IN that's the problem.
>
> Anywhere else I should look before I call support @ Elecraft?
>
> Thanks to all who replied via pm with helpful suggestions,
>
> john
> VK7JB
>
> --
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> Sent from the Elecraft mailing list archive at Nabble.com.
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