Fw: [R-390] r390a problems

[Dallas Lankford]

----- Original Message -----
From: "Dallas Lankford" <dallas at bayou.com>
To: "Barry Hauser" <barry at hausernet.com>
Sent: Sunday, January 09, 2005 3:40 PM
Subject: Re: [R-390] r390a problems


> Everything Barry said, not just the part I kept below, is good advice.
>
> I would add that you can usually find a bad transformer by doing an
> alignment for the bands in question, if you can get enough signal through
> the front end to tell if changing the inductors and trimmer capacitors
> changes the signal levels.
>
> ----- Original Message -----
> From: "Barry Hauser" <barry at hausernet.com>
> To: "Steve Hobensack" <stevehobensack at hotmail.com>;
<r-390 at mailman.qth.net>
> Sent: Sunday, January 09, 2005 3:18 PM
> Subject: Re: [R-390] r390a problems
>
>
> > While that's a fundamental check -- lineup of the indexing marks --
> > nevertheless it's possible, even if they do, that the situations Dallas
> > described are still at work.
> >
> > Slug racks can hang for a portion of their travel.  You have to crank
the
> RF
> > deck up and down through all the MC positions and pay particular
attention
> > to the racks as they move downwards -- or are supposed to be -- that the
> cam
> > follower rollers are truly in contact with the cams.  Tap gently on the
> > rack(s) to make sure of this as it is often difficult to see.  I had a
> > similar situation and the symptoms sound very familiar -- dead bands,
> images
> > and other strange stuff.  Do the same with the KC knob and watch the
cams
> at
> > various MC positions.
>
> <cut>
>