[amsat-bb] FT-847 Disaster

k7zt@suddenlink.net k7zt at suddenlink.net
Tue Dec 25 06:58:28 PST 2007

Many Thanks for all of the responses and Merry Christmas to all!

I have done some preliminary troubleshooting and have discovered the 

The fuse and the electronic cap are fine.  I get good voltage to one side of 
the relay, the relay coil appears to be energized but the 12 VDC stops at 
the relay.  I did jumper the 12 volts to the other side of the relay and the 
display lights up and I hear noise from the speaker. But no frequency 

This is as far as I've gotten.  I did note on the schematic that the relay 
has two transistors (Q1118 & Q1122).   Q1118 is labeled as H-V Protection on 
the block diagram. Both of these devices connect to the relay (FL1001). 
I've looked on both sides of the board and can't seem to locate these 

- Joe K7ZT

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