[TechAssist] Re: Zenith SY3581DT modules 9-1675-01, 9-1672-01 int vid & osd
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 30 Jun 2003 12:12:16 -0400
Actually, I had not changed nor checked R3219 near the yoke connector
because I thought that that resistor was another one that I was misreading
the number on from the back of the board. Your description clued me in to
that mistake. After replacing this one I get normal OSD and a picture but I
cannot get any effect from the green controls in the service menu to balance
the color. The blue controls have little effect at all.
Leonard G. Caillouet
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
----- Original Message -----
From: "Ron Miller d.b.a. Country TV" <rlmbkm@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 27, 2003 4:54 PM
Subject: [TechAssist] Re: Zenith SY3581DT modules 9-1675-01, 9-1672-01 int
vid & osd
> Have you tested the 110k and 82k ohm resisters near the yoke plug?Pull on
> end to get an accurate reading.hth
> Country TV
> Ron Miller
> Inez, TX. 77968
>
> ----- Original Message -----
> From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, June 27, 2003 3:33 PM
> Subject: [TechAssist] Zenith SY3581DT modules 9-1675-01, 9-1672-01 int vid
&
> osd
>
>
> > I'd like to know what signals from the sweep board go to the main board
if
> > someone has a manual.
> >
> > This one has intermittent video and OSD. It also has erratic color,
looks
> > like an AKB problem. All the usual suspects on the CRT board are OK and
> the
> > tube tests good. Can't tie it down to thermal or connection problems.
I
> > had sent the main board in to TSM for rebuild and it came back and does
> the
> > same thing. I thought that heating and cooling the micro module
effected
> > the problem, but it is hard to reproduce.
> >
> > Also, while I had the OSD up for a bit I was able to get into the
service
> > mode and attempted to adjust the white balance and found the green
> > adjustments had no effect at all. This makes me suspect the VCJ or
> related
> > circuits, but I know that I don't have OSD out of the micro when it
goes.
> I
> > must be missing something.
> >
> > One strange thing that I noticed is that sometimes adjusting the screen
> > control affects the menu coming and going. When it comes and goes it
> looks
> > like the sync is corrupted and has ripples rolling through vertically.
> > Sometimes disconnecting the antenna input will bring up the OSD, but
> > unstable. Any info on the sync paths for the OSD, clock and data lines,
> and
> > insertion points on the VCJ would be appreciated also.
> >
> > I have already changed R3234, BTW, though it was fine.
> >
> > Thanks.
> >
> > Leonard G. Caillouet
> > Electronics World
> > Gainesville, FL
> > 352-332-5608
> > 352-332-5668 (fax)
> >
> >
> >
>
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