[Premium-Rx] RF-590 trouble shoot

[martuccif at tele2.it]

in my opinion you have already found 90 % of the fault .
Let me explain , if you have found that with a small pressure on the filter the situation changes they have 3 possibility :
1) a dry solder on filter pins at printed board level (but i think you have already checked )
2) a track cutted between the track and trough hole where the filter is inserted
3) a dry joint inside the filter (i hope for you that is not the case)
for this last situation you can do this but is a little bit complicate , if you do not have any replacement filter you can swap the 6 khz filter with an other one ( the bandwith is not important because in the self test only the levels are measured and not the passband ) this means that you have to dismount an other filter.
Obviously if you make this the fault will be related to another position.
What is more 'technical ' is to measure the input and output levels with adequate instrument ,in this case when the 6 khz filter is faulty you will found a output level that is not correct .
I assume in all those conditions that you really note that on 6 khz position there is a real problem at hears level  (audible sound), otherways the problem is the self test. 
Me i be somebody can give other suggestion.Wat i have suggested for point 3 ( swap of filters) is a 'desert'  solution and you have to be a good workman for soldering and desoldering.
       let me now your progress on repair   francesco (i8fym/fe6eqj)     
> 
> Da: Ka9p at aol.com
> Data: 2005/05/31 mar AM 03:32:44 GMT+02:00
> A: premium-rx at ml.skirrow.org
> Oggetto: [Premium-Rx] RF-590 trouble  shoot
> 
> 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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