Stephanie, One of the high probability places for a solder failure is on the thermistor board. First thing is to check the 4 volt output - look for 4 volts on RF Board U6 pin5 - if it is not close to 4 volts, find the solder splash on the thermistor board. Sometimes you can examine the board by removing the front panel and control board, but it is no great deal to remove it completely, just clip the 8 wires and take it out - solder new wires to re-install. You are most likely to find a solder problem somewhere in the PLL area, but that thermistor board is the most likely suspect.
One other common cause of PLL failure is T5 - be certain the winding sense is correct - if you have one of the windings reversed, it will not work. 73, Don W3FPR > -----Original Message----- > > I've just got to the Alignment and Test Part 2 for my K2 and right > off I've hit a problem. I've got the freqency counter probe plugged > into TP3, and I'm in Cal Fctr, but instead of the expected 12090 I'm > getting around 400. It wavers between 398 and 400. The frequency > probe works all right, when I try it on the 4 MHz crystal on the > control board, I get a reading as expected in the Aligntment part 1. > > I'll be spending more time tomorrow reviewing the PLL area but if > anyone has some suggestions on likely culprits, advice would be most > welcome. > > Thanks & 73! > > -Stephanie > va3uxb > > _______________________________________________ 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
