[Elecraft] KAT100 - Reluctant to come on, K2 often displays "not inst"

[Bill Coleman]

Jack screws appear to be tight on both ends. 

After I cycle the power 6-12 times, it will eventually come up. I wonder if I have a bad PIC chip in the KAT100. I may try an older version of the firmware, I think I have one. That will take a few days.

I can put a scope on Pin 40 of the PIC chip. I see transitions. Anything I can diagnose with a scope?

> On Aug 5, 2018, at 5:14 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:
> 
> Bill,
> 
> Fine on the power sequence, but the Not Inst message indicates that either the Control Cable to the K2 is not fully plugged in (check both ends) or the cable has a bad connection, or that the firmware in the KAT100 is not being recognized.
> 
> You should tighten the cable jackscrews to check the first, and for the last situation, try reseating the firmware IC in the KAT100.
> 
> 73,
> Don W3FPR
> 
> On 8/5/2018 4:50 PM, Bill Coleman wrote:
>> Yes, I have a cable that has the PowerPole connections to the K2/100, and a separate coaxial jack for the KAT100.
>> I switch the power supply on, which means the KAT100 has power, then switch the K2/100 on, which powers up the combo.
>> So, yeah, I have power applied to the KAT100 before the K2.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
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