[TechAssist] Re: Zenith C3S chassis SJ2775BG SM question
- From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 3 Dec 2001 07:49:51 -0500
I've recently found that some of the crts using AKB circuits like yours have
been responding rather well to boosting the heater voltage. I have yet to
know if the life of the crt is shortened somewhat or considerably....but
when the only other choice is replacement of the crt, getting a little more
life from an old tube may be a reasonable choice for your customer.
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Jon Garver" <jongar@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 03, 2001 12:20 AM
Subject: [TechAssist] Re: Zenith C3S chassis SJ2775BG SM question
>
> My own zenith has a weak tube. Red is predominant. Since there aren't
> any adjustments, I experimented with changing the biasing of the red
> drive. I don't remember which resistor I replaced off hand but I replaced
> it with a variable one and was able to back off the red enough that the
picture
> looks pretty decent.
>
> Jon Garver
>
>
> Ron Miller wrote:
>
> > Tried that ,gray scale is on the green side mot much but I notice it.
> > Ron Miller
> > D.T.V. Texas
> >
> > ----- Original Message -----
> > From: "Ray Lufkin" <Rlufkin@xxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, November 30, 2001 5:33 PM
> > Subject: [TechAssist] Re: Zenith C3S chassis SJ2775BG SM question
> >
> > >
> > > I may be off base here but can you adjust akb by turning the g2 pot on
the
> > > fly all the way off and bringing the g2 pot up very very slowly. Put
up
> > > bars, brightness at 50% contrast at 75% color at 50% and bring up g2
pot
> > > till you just distinguish the 1st and 2nd box on bottom right.
>
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