[Elecraft] KDSP2 stopped working, LED always on

[Don Wilhelm]

Brian,

Unless you unseated the DSPx module (the one on top), it is not likely 
that you did anything overt to create that problem.  Treat it as a new 
problem that just happened to appear.

It could be a solder connection that was marginal, or it could be that 
one of the pins of the KDSP2 U1 IC became oxidized.  Try re-seating U1 
to clean off any oxidation by the wiping action that results.
If that does not help, try re-flowing the soldering on the KDSP2 with a 
hot (750 degF) soldering iron.

The KDSP2 will report Not Installed as long as the LED is lit, so 
getting the reset signal to flow out of the KDSP2 firmware and through 
the DSPx module is the first step.  Make certain the DSPx module is 
placed properly in the sockets on the lower board and none of the DSPx 
pins are bent.

73,
Don W3FPR

On 3/21/2014 3:38 PM, Brian - N5BCN wrote:
> My KDSP2 has been working fine up until today when I cracked open the lid of
> the K2 to perform a VFO dial calibration.  At some point during the process,
> I noticed that the KDSP2's LED was staying on.  I figured I must have bumped
> something, so I tried cycling the K2 on and off and re-seating the KDSP2
> module (several times).  No luck, the LED stays on and when I issue KDSP2
> commands the K2 reports "not inst" or something like that.
>
>