Ian,
Glad you found it. Keep warm down there!
Yes, soldering is *the* most common builder problem. When in doubt,
check the soldering, then re-check the soldering, and when that is done
- check the soldering.
For those just starting to build, use an iron temperature at about 750
degrees F (800 for the KPA100), and watch carefully for the solder to
flow - if you do not see the solder wicked into the thru-plated hole, it
is not a good solder connection. Use a small diameter solder to assist
in controlling the amount (I prefer .015 inch diameter in a 63/37 alloy
with a midly activated rosin flux). Too much solder can be just as bad
as not enough.
73,
Don W3FPR
Ian Nightingale wrote:
Hi Don, I bow to your genius. The problem appears to be a soldering issue with
the main chip. I was very lucky in that I was able to remove the solder from
one side of the LCD and lift it up enough to get to the chip soldering points.
A re-solder of each pin and all is well with the world.
Very lucky, as the next post for me arrives late October.
I wonder if it would be worth adding a test stage pre-LCD install to prevent
juniors like myself going down this route.
Hopefully I'll have time to complete in the next few weeks and be transmitting
from the hills of Adelaide Island when the sun comes back.
Many thanks again
73,
Ian - VP8ROT (G0VZM)
7:20 AM
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