On Fri, 11 Dec 2009 20:54:04 -0000, Adrian Rees \(MW1LCR\) wrote: >So I assume the Frequency display is working OK, the IF strip & Audio stages >are OK. Readng the block diagram, I think the area I need to examine is the >VCO and all the voltages throughout the Transceiver. > >Is this the way to go ?
Look in the Drakelist archives for messages related to cleaning Molex pins and re-seating boards. Then do that as the first troubleshooting step. Cures most strange problems with 7-line radios these days. Following on from that, I would look at the DC-DC converter board in the front right corner of the radio, there are a couple of well-known failures there. This board is critical to proper operation of the synthesizer. Be advised, if you even breathe on the pots at the top of this board wrong, be prepared to do a fixed passband alignment (which is simple and easy to do). 73 -Jim NU0C -- "It's an Earth food. They are called Swedish meatballs! It's a strange thing, but every sentient race has its own version of these Swedish meatballs! I suspect it's one of those great universal mysteries which will either never be explained, or which would drive you mad if you ever learned the truth!" - G'Kar, Babylon 5 _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
