George, Since you suspect no power to U1, I suggest you look at the schematic to identify the pins of U1 that are connected to the 5 volt supply line and check for the presence of voltage with a DVM.
If you find no 5 volts where it should be, then check the regulator U3. You should have 12 volts on the IN lead and 5 volts on the OUT leg. If you have 12 volts but no 5 volts, be certain U3 is oriented correctly. If there is not 12 volts on the IN leg, check for the presence of 12 volts at P1 pin 8 - that voltage comes from the K2 over the ribbon cable. 73, Don W3FPR > -----Original Message----- > > Last night I did the first check of the com for the PA stage. I did not > get any NO PA PS msg from the k2. > It seems like the U1 is not getting power but I have no idea how > to check > this. > Any ideas? > > Thanks > > George NE2I > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.3/699 - Release Date: 2/23/2007 1:26 PM _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
