[TechAssist] Re: Zenith TV Mod# A25A11D, Module#
- From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 11 Nov 2001 11:02:23 -0500
Dennis,
Excellent explanation..thanks.
This is actually for another tech that had asked for help.
I did send him your earlier suggestion.
Jeff
mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
FAX 1-413-280-0677
Intrepid Video & Electronics
Harrisburg, PA 17111
717-909-8844
www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
----- Original Message -----
From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, November 11, 2001 10:41 AM
Subject: [TechAssist] Re: Zenith TV Mod# A25A11D, Module#
>
> Read the original post. He said "the menu is fine". That statement would
> preclude the the need to mention high voltage since you would not have
> menu if high voltage were gone. (EHT).
> He also said it had sound. Granted, he did not say what kind of sound. I
> believed that the sound he heard is the demodulated audio from the
> broadcast station. I could be mistaken.
>
> If I'm not mistaken then the tuner has to be working too. Since the 4.5
> mhz sound sub carrier is stripped from the demodulated video, I am
> making the assumption that the tuner is producing composite video at
> it's detector since audio is present at the output of the FM
> demodulator.
>
> That is why I asked him to check to see if he has composite video or
> luminance at the output of the color/luminance separation circuit, or
> comb filter if it has one.
>
> Dennis Viereck
>
>
> info@xxxxxxxxxxxxxxx wrote:
>
> > From: tv_vcr_audio <infomatics@xxxxxxxxxxxxx>
> >
> > Hello,
> >
> > What do you mean by "High Voltage is fine" Are you refering
> > to B+ or EHT. I=
> > f EHT is OK then check G1, G2 ...voltages.
> >
> > Jeff, you need a tuner/if subber my man....
> >
> > ----- Original Message -----
> > From: "HunterWillie" <HunterWillie@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Saturday, November 10, 2001 6:37 PM
> > Subject: [TechAssist] Re: Zenith TV Mod# A25A11D, Module#
> > 9-1790, Sams#4051=
> >
> > >
> > > Jeff you have a bad tuner (pn 175-2721
> > > Willie Hunter
> > > Hunter Electronics
> > > Detroit Mich.48205
> > > 313-527-2366
> > > ----- Original Message -----
> > > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> > > To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, November 09, 2001 8:28 PM
> > > Subject: [TechAssist] Zenith TV Mod# A25A11D, Module#
> > 9-1790, Sams#4051
> > >
> > >
> > > >
> > > > The above TV came with a black pix. Menu is fine,
> > > > High voltage is fine, Audio is fine but no Raster. I
> > replaced EEPROM
> > and
> > > > had no luck.
> > > > I checked data and clock pins from the tuner to see if
> > the were shorted=
> > ,
> > > > but they weren't.
> > > >
> > > > Jeff
> > > > mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
> > > > FAX 1-413-280-0677
> > > > Intrepid Video & Electronics
> > > > Harrisburg, PA 17111
> > > > 717-909-8844
> > > > www.intrepid-video.com www.tech-repair.net
> > www.thetoolcaddy.com
> > > >
> >
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