Ian,
The very most likely problem is that you have a soldering joint failure.
Look very critically at your solder connections. Is there just a slight
bit more solder applied than that required to fill the thru-plated
hole? Do all the solder joints have a smooth concave slope on the
sides? Do the edges of the solder joint taper out to an almost
invisible edge on both the solder pad and the component lead?
If the answer to any of the above questions is yes, then your soldering
is certainly suspect. You must apply enough heat to cause the solder to
flow out onto the solder pad and down into the thru-plated hole. Any
solder connections that have a blob of solder on them are not well
soldered connections. An excess of solder can hide a poorly soldered
joint, and in fact is the usual appearance of a bad solder joint.
Review the figures in the soldering tutorial on the Elecraft website if
necessary.
73,
Don W3FPR
VP8ROT wrote:
Hello, I am building a K1 and have come up against a problem I can't solve at
the " Alignment and Test, part 1".
Here you power the K1 for the first time with the RF, filter and front
boards connected. After the LEDs do their test the LCD screen should show an
error code. Nothing appears on my screen.
I have checked all chip orientations and to the best of my knowledge check
for shorts on the switches (they go from + volts to zero when pressed).
There are no obvious solder problems on the board.
Please could someone suggest any tests I should perform to find the source
of my problem.
Many thanks,
Ian, VP8ROT
Rothera
Antarctica
_______________________________________________
Elecraft mailing list
Post to: [email protected]
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
