[Elecraft] K2DSP troubleshooting advice
Lyle Johnson
[email protected]
Thu Jul 17 23:25:01 2003
Hello Dale!
> Well, I got my K2DSP assembled, powered up the rig, no LED. ...
> What I am looking for is advice from the experts on where to go next.
1) With power off, unplug the DSPx module.
2) re-apply power and check the +5V. If it is OK, the DSPx may be at fault
or it may not have been inserted correctly (I've done the latter myself...)
3) If the +5V is still bad, remove power and remove the MCU from its socket.
4) Re-apply power and check. If the +5V is OK, the MCU was probably
backwards in its socket (I've done this, too). Re-install it very
carefully!
5) If it is still bad, start looking for shorts across things like the 10 uF
electrolytics, or some of the TO-92 parts being in the wrong locations.
-Lyle KK7P