K1 KAT1 ATU produces constant '---' display

[Ron Hahn (EI2JP)-3]

Fellow Elecrafters,

Having a problem with testing the KAT1 (Rev CR board) in a K1 (Rev E)
radio.  The radio and 4-band filter board are fully tested but I cannot
get past the '---' in the ATU menu for checkout.

I've checked Vcc and Vdd on the micro-controller (Rev 1.30) and its
5.9v.  I've double checked all solder joints, removed and re-inserted
the MCU and ensured that both connectors are seated properly as well.

This board is so simple.. have I a duff MCU or is there something else I
can look for at this stage?

Thanks for the help,

Ron
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[Don Wilhelm-4]

Ron,

If you are certain of the soldering (check the connectors on the RF
Board and the KFL1-4 board too), then yes, change either the MCU *or*
the resonator in the KAT1.

If you have a 'scope, you can check the resonator to see if it is
oscillating.

73,
Don W3FPR

Ron Hahn (EI2JP) wrote:

> Fellow Elecrafters,
>
> Having a problem with testing the KAT1 (Rev CR board) in a K1 (Rev E)
> radio.  The radio and 4-band filter board are fully tested but I cannot
> get past the '---' in the ATU menu for checkout.
>
> I've checked Vcc and Vdd on the micro-controller (Rev 1.30) and its
> 5.9v.  I've double checked all solder joints, removed and re-inserted
> the MCU and ensured that both connectors are seated properly as well.
>
> This board is so simple.. have I a duff MCU or is there something else I
> can look for at this stage?
>
> Thanks for the help,
>
> Ron
>  
>  

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