[Elecraft] KIO2 Stopped Working

[Don Wilhelm]

If you suspect that you had shorted something on the computer interface
connector, the most likely damage points would be the small inductors - and
don't forget about the one in the 12 volt line on the AUX2 board (the most
likely - L2, L3 and L4 should withstand a short to ground without failure).

After checking the inductors for continuity, I would recommend first
following the voltage check table in the instruction manual for the KIO2.

If the voltages are correct, the interface should work.

There are ONLY 2 RS-232 level signals on the interface connector - pin 2
TXD, pin 3 RXD plus pin 5 (signal common) and pin 1 which is chassis ground.
The other used pins (6, 7, 8, and 9) carry internal K2 signal lines - DO NOT
connect RS-232 level signals to those pins if you value your K2!!!  Bad
things will happen.

73,
Don W3FPR

----- Original Message ----- 
From: "Daniel E. Salo" <elist@kindercomputercare.com>


> My KIO2 was working perfectly until I tried a new computer interface
> cable in the microphone jack (the SSB module is installed).  It's
> possible that there was a short in the computer interface connector,
> but that has been fixed.
>
> Now, after removing the computer interface, the KIO2 appears to be
> dead.
>
> The PORT menu option is set to ON.
>
> Using K2Remote and Hyperterminal, I'm not getting any response.  The
> serial cabling is the same as before.
>
> Where do I begin troubleshooting this situation?
>