[Elecraft] K1 - Front Panel - Nothing on LCD

[Don Wilhelm]

Angie,

You are quite correct - can we blame it on a 'senior moment'?
I do trust the point was made, and I will not publish a correction other 
than this post.

Just as verification of my points - I just finished a KX1 repair and 
except for one misplaced component, the problems were all due to excess 
solder and inadequately heated solder pads.  At least 5 problems were 
identified, but then I removed the excess solder and re-soldered 
components in a large area each time, so who knows how many more were 
actually present.  This *is the* most common cause of kit building failure.

73,
Don W3FPR

Augie Hansen wrote:
> Hi Don,
>
> Given the way you phrased the questions, I believe that a "no" answer 
> to one or more would indicate a soldering problem. Wouldn't "yes" to 
> all indicate successful soldering?
>> ...
>> 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.
>
> Gus Hansen
> KB0YH
>
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