[TechAssist] Re: Zenith SMS-2053S, Herringbone

  • From: "Bruce Youmans" <youmans@xxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 21 Nov 2003 22:50:39 -0700

Peter,

You have a good memory. Yes, Zenith had a very similar problem with the
9-1130 module. There was a capacitor mounted on to 2 jumper leads. I believe
it was a 10ufd@35v.  The module I have, 9-1457-1 has similar symptoms, but
does not have the capacitor mounted on the jumpers. I do not know if there
is a capacitor mounted on the board that has the same function since I do
not have schematics for these two modules for comparison.

Bruce
Bruce's TV Service
Sierra Vista, Arizona


----- Original Message -----
From: Peter oliver <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 21, 2003 8:11 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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