[Elecraft] K3 - communication failure after KIO3B upgrade

[Carl Clawson]

Steve AD7OG graciously permitted me to tear his K3 apart and swap boards.
KIO3B main board is bad and Elecraft is sending a replacement.

73 - WS7L, whose K3 #486 after 8 years of service just keeps getting better!

On Tuesday, July 19, 2016, Carl Clawson <clawsoncw at gmail.com> wrote:

> I've been in conversation with tech support but we have not yet found
> what's wrong.
> -- Carl
>
> On Tue, Jul 19, 2016 at 2:53 AM, Barry Simpson <vk2bj at optusnet.com.au
> <javascript:_e(%7B%7D,'cvml','vk2bj at optusnet.com.au');>> wrote:
>
>> Hi Carl
>>
>> Did you get the KIO3B problem resolved ?
>>
>> Barry  VK2BJ
>>
>>
>> ---------- Forwarded message ----------
>> From: Barry Simpson <vk2bj at optusnet.com.au
>> <javascript:_e(%7B%7D,'cvml','vk2bj at optusnet.com.au');>>
>> Date: 17 July 2016 at 13:03
>> Subject: Re: [Elecraft] K3 - communication failure after KIO3B upgrade
>> To: Carl Clawson <clawsoncw at gmail.com
>> <javascript:_e(%7B%7D,'cvml','clawsoncw at gmail.com');>>
>> Cc: Lyle Johnson <kk7p4dsp at gmail.com
>> <javascript:_e(%7B%7D,'cvml','kk7p4dsp at gmail.com');>>, elecraft <
>> elecraft at mailman.qth.net
>> <javascript:_e(%7B%7D,'cvml','elecraft at mailman.qth.net');>>
>>
>>
>> Hi Carl
>>
>> Have you actually set RS232 to USB in the Config menu ?  Just a thought.
>>
>> Barry  VK2BJ
>>
>> On 17 July 2016 at 11:47, Carl Clawson <clawsoncw at gmail.com
>> <javascript:_e(%7B%7D,'cvml','clawsoncw at gmail.com');>> wrote:
>>
>>> Thanks Lyle. I tried those things. If it's a cable problem then I must
>>> have
>>> TWO defective cables, because feeding RS232 to the P3 and connecting the
>>> single-headed cable to the K3 also results in no communications to the
>>> K3.
>>> And yes, I put the K3 in RS232 mode at 38400 baud when I tried that.
>>>
>>> -- Carl
>>>
>>> On Sat, Jul 16, 2016 at 5:52 PM, Lyle Johnson <kk7p4dsp at gmail.com
>>> <javascript:_e(%7B%7D,'cvml','kk7p4dsp at gmail.com');>> wrote:
>>>
>>> > Carl,
>>> >
>>> > A couple of thoughts.
>>> >
>>> > 1) Losing communications with the Y cable plugged into the KIO3B but
>>> not
>>> > having BOTH DE-9 connectors attached to the P3 will result in no
>>> > communications.  The KIO3B senses the Y cable and routes the USB side
>>> > communications to the P3 which then routes signals to the K3.
>>> >
>>> > 2) Be sure the cable is fully seated into the jack on the KIO3B. The
>>> > plastic lock should "click" into place.  You can verify this with a
>>> gentle
>>> > tug on the cable after it is inserted to verify it is fully seated.
>>> >
>>> > 3) Be sure the P3 is set to 38,400 bps on its serial ports.
>>> >
>>> > 4) If the cable is fully seated and the P3 is set to 38,400 bps and you
>>> > still have the problem, I'd suspect the Y cable being defective.  I
>>> don;t
>>> > know if the schematics for the cable are on the website or supplied
>>> with
>>> > the cable to assist you in troubleshooting the cable if you so desire,
>>> so
>>> > it may require a call to support on Monday, or an email directly to
>>> them.
>>> >
>>> > 73,
>>> >
>>> > Lyle KK7P
>>> >
>>> >
>>> > Maybe the combined wisdom of the group will be able to help before I
>>> send
>>> >> this to Elecraft support.
>>> >>
>>> >> I installed the KIO3B upgrade in my K3. The USB interface from PC to
>>> K3
>>> >> works but only if you don't plug a cable in the RS232/P3 jack. The
>>> RS232
>>> >> connection to the P3 isn't happening...
>>> >>
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>>> <javascript:_e(%7B%7D,'cvml','vk2bj at optusnet.com.au');>
>>>
>>
>>
>>
>