[TechAssist] Re: Zenith SMS-2053S, HerringboneFIXED
- From: "Bruce Youmans" <youmans@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 11 Dec 2003 08:33:47 -0700
Finally got this dog fixed. Originally, I had changed the tuner because of a
herringbone problem. No change. Went through the AGC circuit checking every
part. Nothing bad. Finally tried another tuner and the set works great. The
original replacement tuner was a new one, not a rebuilt and had exactly the
same problem as the original tuner the set came in with. What's the chances
of that happening?
Thank you Bob and Peter for you help.
Bruce
Bruce's TV Service
Sierra Vista, Arizona
----- Original Message -----
From: Bruce Youmans <youmans@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 01, 2003 8:44 AM
Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
Greetings,
Still fighting with this set. I have concluded that even though the AGC
circuit seems to be working, it may not be working correctly. I need a
schematic of the circuit to go further. Does someone have a schematic they
can email me directly, upload to the members area, or fax me? I mainly need
the AGC circuit.
Make: Zenith
Model: SMS-2053S
Module: 9-1457-1
Thank you for your help.
Bruce
Bruce's TV Service
Sierra Vista, Arizona
----- Original Message -----
From: Bruce Youmans <youmans@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, November 23, 2003 2:11 PM
Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
Bob,
This Zenith uses a 9-1457-1 module. There does not appear to be a capacitor
just to the left of the regulator heat sink hooked between two jumpers. The
only capacitors in that area are mounted through holes on the PCB and are:
C3417, 222K, Ceramic
C3419, 182K, Ceramic
C3482, .001, Mylar
No electrolytics in that area.
Any other thoughts?
Thanks for you assistance.
Bruce
Bruce's TV Service
Sierra Vista, Arizona
----- Original Message -----
From: Bob@Bobs tv <woodman1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, November 22, 2003 7:31 AM
Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
Thanks Peter, Bruce apr 1" to the left of the regulator heat sink small cap
hooked between two jumpers... just replace it...
Bob,
Bobs TV Worcester, ma
woodman1@xxxxxxxx
Main 508-853-1482
Fax 508-853-1480
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 21, 2003 10:11 PM
Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
> This Item is sparking a distant memory, seem to rember a series of zeniths
> that had some problem like yours where there was a cap that was tied
between
> 2 jumpers on the board, can't recall what maybe will spark someones
memory.
>
> Peter Oliver
> Tucson Radio TV
>
>
> From: "Bruce Youmans" <youmans@xxxxxxxx>
> Reply-To: techassist@xxxxxxxxxxxxx
> To: <techassist@xxxxxxxxxxxxx>
> Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
> Date: Fri, 21 Nov 2003 17:29:31 -0700
>
> Bob,
>
> Checked all caps in vicinity of tuner. All check good. Also replaced
> capacitor on AGC line. Still not good. I have been working without a
> schematic. I will probably need to get a PDF schematic of the 9-1457-1
> module and dig dipper into the AGC circuit. It must be something simple
that
> I'm overlooking.
>
> Bruce
> Bruce's TV Service
> Sierra Vista, Arizona
>
>
> ----- Original Message -----
> From: Bob@Bobs tv <woodman1@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, November 21, 2003 3:02 PM
> Subject: [TechAssist] Re: Zenith SMS-2053S, Herringbone
>
>
> Bruce,
> Check/replace caps near tuner especially one going to AGC line to
> tuner..
> Bob,
>
> Bobs TV Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main 508-853-1482
> Fax 508-853-1480
> ----- Original Message -----
> From: "Bruce Youmans" <youmans@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, November 21, 2003 3:56 PM
> Subject: [TechAssist] Zenith SMS-2053S, Herringbone
>
>
> > Make: Zenith
> > Model: SMS-2053S
> > Module: 9-1457-1
> > Herringbone (beat pattern) in picture on some channels, 5 through 60
> mainly. Some noise (snow) in picture and also faint vertical bar floating
> from side to side on some channels. Channels 2 through 4 are clear.
> >
> > Have swapped tuner, no change.
> > Video input is good.
> > Power supply voltages are clean.
> > Any ideas or tips appreciated.
> >
> > Bruce
> > Bruce's TV Service
> > Sierra Vista, Arizona
> >
> >
>
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