Re: That NTSC/PAL 1084 monitor thing...

From: Stephen Judd (judd_at_merle.acns.nwu.edu)
Date: 1998-10-03 04:16:49

> 
> Martijn van Buul wrote:
> > 
> > Stephen Judd wrote:
> > > P.S. Does anyone happen to have suggestions as to how to fix up a
> > > monitor whose vertical sweep is toast, and oh by the way what about
> > > a monitor which seems to have extra red saturation? :)
> > While I don't know about that sweep thingy, it should be possible to fix
> > the saturation part. IIRC, there are 3 potentiometers on the small
> > PCB connected to the CRT. You can use them to adjust the saturation levels
> > of each different colour.
> > (at least, it worked for me and my old 1084S)
> 
> That is true. Virtually all monitors have these pots (the 1084's indeed

Yeah, I always figured that's what they were for.  One of them was
clearly off-center, and sure enough, turning it back fixed up the
problem (I think someone else had tried to "fix" the monitor).

The only other 1084 problems I have had are the dreaded cold solder joints.
FWIW, the first time around I located the problem by moving the PCB around
in a dark room; the arcing was then visible.  Now I think they bad
joints are pretty easy to find, though -- flow a little new solder in
them and voila!  Good for another 10-20 years.

Anyways, turning the pot seems to have done the trick, so thanks
guys!  And it still doesn't do PAL color :).  One down and 4 more
monitors to go :).

-Steve
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