[TechAssist] Re: Zenith flyback --FIXED

  • From: Al Gutz <alg@xxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 18 Jul 2003 22:42:09 -0400

Jim
 You have to be careful at that speed that ypu don't hit one of those
mad cows we have here.

Al G
Al's TV-Electronics
Pembroke Ont.
Canada

Jim Myers wrote:
> 
> So if it reads about 120 ohms Celsius , or about 45 ohms Fahrenheit it's a
> keeper, eh? By the way, I was in Canada this past weekend, it was fun
> driving 100 for a change, sure beats 65.
> **************************************************
> Jim Myers
> Since 1972
> Telrad Electronic Services Co.
> Fort Wayne, IN 46815
> *************************************************
> ----- Original Message -----
> From: "Teltek3" <teltek3@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, July 18, 2003 6:35 AM
> Subject: [TechAssist] Re: Zenith flyback --FIXED
> 
> Well yeah...we use "metric" ohms here. Like Farenheit and Celsius.
> 
> -Ed-
> Tel-Tek Electronics
> Ontario-Canada
> 
> teltek3@xxxxxxxxxxxx
> ----- Original Message -----
> From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, July 18, 2003 2:34 AM
> Subject: [TechAssist] Re: Zenith flyback --FIXED
> 
> > Ed,
> > Must be that Canadian exchange rate for voltage measurements.
> > I have always read around 50vdc,....anything higher than 60vdc on a HOT, I
> chuck.
> >
> > Jeff Dougherty
> > Intrepid Video TV/VCR
> > 263 S Front St
> > Steelton PA 17113
> > fax...717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> >
> > ----- Original Message -----
> > From: "teltek3" <teltek3@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, July 16, 2003 2:48 PM
> > Subject: [TechAssist] Re: Zenith flyback --FIXED
> >
> >
> > Jim;
> > 45 ohms??? I normally read 120 to 145 ohms..are you sure about 45?
> >
> > -Ed-
> > Tel-Tek Electronics
> > Ontario-Canada
> > teltek3@xxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, July 16, 2003 1:36 PM
> > Subject: [TechAssist] Re: Zenith flyback --FIXED
> >
> >
> > > Tom, R-U sure? Most HO transistors have an internal base to emitter
> > resistor
> > > of about 45 ohms. This is a mistake we have all made at least once.
> > > **************************************************
> > > Jim Myers
> > > Since 1972
> > > Telrad Electronic Services Co.
> > > Fort Wayne, IN 46815
> > > *************************************************
> > > ----- Original Message -----
> > > From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Wednesday, July 16, 2003 12:29 PM
> > > Subject: [TechAssist] Re: Zenith flyback --FIXED
> > >
> > >
> > > Jeff,
> > >         Sorry it took a little while to get back to you, as I busy
> kicking
> > > myself in the AXX as you were completely right, and I should have known
> > > better. The H.O. Transistor has a base to emitter short of 45 ohms, when
> I
> > > checked it in circuit it read shorted but I took for granted it was just
> > > drive transformer secondary winding. But when you think about it
> > logically,
> > > it had to be the H.O.Transistor. Thanks Again , and to all who replied
> so
> > > quickly.
> > > Tom Berger
> > > Tri-County TV
> > > Robbinsville
> > > North Carolina 28771
> > > (tricountytv@xxxxxxxxxxxxx)
> > > ----- Original Message -----
> > > From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Wednesday, July 16, 2003 12:23 PM
> > > Subject: [TechAssist] Re: Zenith flyback --need sub info
> > >
> > >
> > > > Remove the output transistor completely:  Fire up the set and check
> for
> > > good
> > > > base drive...that will confirm your H-drive question:
> > > >
> > > > Try another output transistor to be sure....it really sounds like it's
> > > > defective...since PS is not squealing once you unsolder the collector.
> > > >
> > > > ==========================
> > > > Jeff Stielau
> > > > Shoreline Electronics Repair
> > > > 344 East Main Street
> > > > Clinton,CT 06413
> > > > 860-399-1861
> > > > 860-664-3535 (fax)
> > > > jstielau@xxxxxxxx
> > > > ==========================
> > > > "If you push something hard enough it will fall over."
> > > > Fudd's First Law of Opposition - Sir Sidney Fudd
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Wednesday, July 16, 2003 12:14 PM
> > > > Subject: [TechAssist] Re: Zenith flyback --need sub info
> > > >
> > > >
> > > > > Jeff,
> > > > >        I checked that and it's good.I did notice that there is no b+
> > > > getting
> > > > > to the driver transformer and I'm not sure if I should have voltage
> > > there
> > > > > when you first plug it in.
> > > > > Tom Berger
> > > > > Tri-County TV
> > > > > Robbinsville
> > > > > North Carolina 28771
> > > > > (tricountytv@xxxxxxxxxxxxx)
> > > > > ----- Original Message -----
> > > > > From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Wednesday, July 16, 2003 12:02 PM
> > > > > Subject: [TechAssist] Re: Zenith flyback --need sub info
> > > > >
> > > > >
> > > > > > Your Horizontal Output is probably shorted.
> > > > > >
> > > > > > ==========================
> > > > > > Jeff Stielau
> > > > > > Shoreline Electronics Repair
> > > > > > 344 East Main Street
> > > > > > Clinton,CT 06413
> > > > > > 860-399-1861
> > > > > > 860-664-3535 (fax)
> > > > > > jstielau@xxxxxxxx
> > > > > > ==========================
> > > > > > "If you push something hard enough it will fall over."
> > > > > > Fudd's First Law of Opposition - Sir Sidney Fudd
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Wednesday, July 16, 2003 11:19 AM
> > > > > > Subject: [TechAssist] Zenith flyback --need sub info
> > > > > >
> > > > > >
> > > > > > > Hello,
> > > > > > >          I got this zenith color TV model SS2761S , module 9-913
> > > ,and
> > > > > the
> > > > > > flyback had a slit in the side with stuff oozzing out , Flyback #
> > > > 95-4203
> > > > > ,
> > > > > > when you look this # up on tritronics, it shows a 95-4203-REP for
> 17
> > > > > > dollars, so I ordered it, and installed it into the module and now
> ,
> > > > when
> > > > > > you plug it in, the ps squeals, so I replaced all the usual ps
> > > > components,
> > > > > > and same problem,also checked for shorts on secondary of fly and
> > > > > everything
> > > > > > looks ok, If I disconnect the collector of the HOT it stops
> > squealing
> > > > and
> > > > > ps
> > > > > > voltages return to normal, however I am not reading and B+ on any
> > legs
> > > > of
> > > > > > the driver transformer, I do not have the schematic and would
> > greatly
> > > > > > appreciate if someone could upload one. Could this replacement fly
> > be
> > > > the
> > > > > > trouble? Has anyone had experience with this flyback?
> > > > > > > Tom Berger
> > > > > > > Tri-County TV
> > > > > > > Robbinsville
> > > > > > > North Carolina 28771
> > > > > > > (tricountytv@xxxxxxxxxxxxx)
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
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