[TechAssist] Re: UPD*8TV Zenith Z25A02G, 9-1789, video distortion

Hi Jeff
make sure RX3277 didnt change in value.
is your G2 vdc ???
also check the following:
C-2217 / C-2218 / C-2227
D-2202 / D-2203 / D-2204
also the main Q-5104 on the CRT PCB if you have one there.
fuzz
----- Original Message -----
From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, July 30, 2001 5:00 PM
Subject: [TechAssist] Re: UPD*8TV Zenith Z25A02G, 9-1789, video distortion



Thanks Fuzz,
I know about that, but I have to turn it down a little more, maybe a quarter
turn to get rid of the intermittent distortion.
Can I send it out, now that's it's working, or should I install a CRT
isolator on it?
Jeff

FAX 1-413-280-0677
Jeff Dougherty **Vacation 8/27 to 8/30**
Intrepid Video & Electronics
501 Luther Rd
Harrisburg, PA 17111
717-909-8844
VCR tips, electronics info & general interest.
www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com


----- Original Message -----
From: "Fuzz" <fantaj@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, July 30, 2001 4:43 PM
Subject: [TechAssist] Re: UPD*8TV Zenith Z25A02G, 9-1789, video distortion


>
> Hi Jeff
> normally on zenith you adjust G2 till the picture gets bright with
> retrace then back off.
> hope this helps
> fuzz
> ----- Original Message -----
> From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, July 30, 2001 4:24 PM
> Subject: [TechAssist] Re: UPD*8TV Zenith Z25A02G, 9-1789, video
> distortion
>
>
>
> I just found out, reducing the screen voltage, the distortion does not
> come
> back.
> Is this a sign of a weak tube, already?
> Jeff
>
> FAX 1-413-280-0677
> Jeff Dougherty **Vacation 8/27 to 8/30**
> Intrepid Video & Electronics
> 501 Luther Rd
> Harrisburg, PA 17111
> 717-909-8844
> VCR tips, electronics info & general interest.
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>
>
> ----- Original Message -----
> From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> Sent: Monday, July 30, 2001 4:04 PM
> Subject: [TechAssist] TV Zenith Z25A02G, 9-1789, video distortion
>
>
> >
> > This is an odd one.1998 set, 9-1789 module
> > Usually during scene change, the picture, about two inches high
> appears
> out
> > of focus, distorted.
> > Distortion is all the way across the CRT, about two inches high, lasts
> for
> > any where from a few seconds, or until the next scene change.
> > At one point, I had rainbow colors around the outside edges, turning
> off,
> > and back on and the picture was normal until these wavy, distorted
> bars
> > appeared.
> > Has any one seen this one before?
> >
> > Jeff
> >
> > FAX 1-413-280-0677
> > Jeff Dougherty **Vacation 8/27 to 8/30**
> > Intrepid Video & Electronics
> > 501 Luther Rd
> > Harrisburg, PA 17111
> > 717-909-8844
> > VCR tips, electronics info & general interest.
> > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> >
> >
> >
> > Help make your TechAssist online repair tips
> > database better!  Submit your fixes here:
> > http://geocities.com/circuit_work/tip/#tips
> > To unsubscribe write to:
> > techassist-request@xxxxxxxxxxxxx
> > with  unsubscribe  in the subject line.
> >
>
> Help make your TechAssist online repair tips
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>
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>

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