[Elecraft] R-KXAT-1 problem

[Don Wilhelm]

Karol,

You may be correct that U1 is damaged, but first check for voltage (6 
VDC) at U1 pins 4 and 14.
If you have access to an RF Probe or oscilloscope, you can check for the 
presence of 4 MHz at U1 pins 15 and 16.  Make certain there is 
continuity between the socket pins and the leads of U1.

There are not many other checks that can be made directly and easily 
with limited equipment.
If you continue to have difficulty, send an email to parts at elecraft.com 
and ask for a replacement U1 and also the resonator Z1.

73,
Don W3FPR

Karol Goralski wrote:
> Hello Everyone!
>
> First of all SORRY for my language. I'm not a native of English.
>
> Before I send some request to Elecrafts Support, I want to ask You.
>
> I soldered R-KXAT1 option for my new Elecraft KX1. TRX working good 
> and I'm very happy. But yesterday I soldered ATU and after plugin it 
> to PCB of KX1 I have problem described in documentation  "---"  three 
> dashes.
>
> I rechecked four times every stem and I suspect that I damaged "U1" - 
> PIC16C716.
>
> Can You tell me how to check it? Have You some  suggestions how to 
> troubleshoot this problem? I have nice pictures of my KXAT1 too :-)
>
> I'm not an expert - thank's for Yout patiance.. :-)
>
> 73's - SQ5LNU , Karol
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