K1 backlight

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K1 backlight

Paul Huff-2
I thought that I would share a little report about my recent K1 backlight
installation.



I was very nervous about tearing into a perfectly good working radio.  But
as someone recently said to me, once you make the first snip on a connection
the radio is broken and now needs to be fixed!



The old display came off easily but cleaning out the pad holes on the board
for the new display was a real pain, and there sure are a lot of them.
Using as little heat as possible I was able to remove much of the solder
with solder wick but most of the holes remained filled.  I ended up heating
up each pad and, while the solder was still melted, pushed a steel sewing
pin through the hole.  The solder doesn't stick to the steel and as soon as
it solidified I could pull the pin back out, leaving a hole just big enough
for the new display leads.  That was the really tough part of the job.
Getting the power to the backlight took a little bit of finesse but it wasn't
too bad, and installing the new display on top of the backlight went
smoothly.  From start to finish the whole job took about 3 hours.



The upgrade was well worth the cost and effort.  That green glow really
looks great and I can now easily read the display even in a dark room.



73

Paul - N8XMS



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Re: K1 backlight

Ed - K9EW
Hi Paul,

I've found that putting some flux on the solderwick braid helps
tremendously in drawing out the solder on the pads and in the holes
without overheating them.

I take a new roll of solderwick, pull out about 2 feet of braid, and
apply liquid soldering flux to it and let it soak in overnight.  Then
I roll it back onto the spool, and I'm ready for the next repair.

73,
ed - k9ew
www.k9ew.us
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