[Elecraft] KX1AT problem

[Paul Brice-Stevens]

Thanks Don,

I shall try and you suggest and report back.

Tnx for the input

73 Paul G0WAT

Don Wilhelm wrote:
> Paul,
>
> The most likely problem is that you have a soldering problem or that 
> the KX1 microprocessor is not fully seated in its socket or perhaps 
> you have a pin bent out/under and is not inserted in the socket.  
> Examine closely again.
>
> As for the soldering paths, make some continuity checks - take the KX1 
> out of its case and plug the KXAT1 into its headers.  Check from KX1 
> U1 pin 2 to KX1 U1 pin 17, check from KX1 U1 pin 6 to KXAT1 U1 pin 13.
> Then apply power and check for 6 volts to ground at KXAT1 U1 pins 4 
> and 14.
>
> It is possible that you have a firmware chip either in the KX1 or the 
> KXAT1 which has a faulty output or input pin, but the best way to 
> confirm that fact is to substitute a new firmware chip.  Make the 
> checks above first to see if you can find a faulty path.
>
> 73,
> Don W3FPR
>
> Paul Brice-Stevens wrote:
>> Hi,
>>
>> I have built a KX1 with the 30m option al installed and its working 
>> fine.
>>
>> I then built the KX1 ATU and it appeared to go together OK and on the 
>> first install it worked and the KX1 recognized it and I started to 
>> play around with the various settings...then when I next switched it 
>> on it gives the '---' message and won't recognize the ATU.
>>
>> I have checked as per the Troubleshooting guide: -
>>
>>
>>
>> - Connectors seems OK
>> - U1 appears insttaled OK
>> - No idea how to check whether U1 is defective...
>>
>> So any ideas what and how to check next?
>>
>> 73 Paul G0WAT
>> KX1  #1043
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