[Premium-Rx] RF-590 trouble shoot

[Ka9p at aol.com]

Looking for some good advice.

I acquired what looked like a slightly long in the tooth 590 orphan a few 
weeks ago, and it's perking along great now but for one small problem.

On the self test, I infrequently get an "assembly 4 - fault 7" message - when 
that happens, the 6 kc filter is inop.  Many days it's fine, no rhyme or 
reason.  So I opened it up, and find with a slight pressure one way or the other 
on that filter, it drops in, but when I relax it, it drops out.

Does this sound like a bad filter solder joint on the board, or a bad filter, 
or possibly the pressure on the board causing something else to make contact 
I should look for? (tho wiggling the other filters and A4 board causes no 
change). 

I'm a bad enough radio mechanic with enough experience to know to ask first 
before I get crazy with the soldering pencil. :)

Thanks for any advice.

Scott
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