[TechAssist] Re: Zenith flyback --FIXED
- From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 16 Jul 2003 16:44:19 -0400
Jim,
I used a 2sd1881 and measured it before I installed it and it did not
show any resistance from base to emitter. It was my last one and the TV is
gone now, should a 2sd1881 have resistance from base to emitter? I know what
you are referring to as I also have seen many HOT that have about 50 ohms
from base to emitter. And at first I thought the original was ok , until I
checked it against my 2sd1881 which did not show any resistance.
Tom Berger
Tri-County TV
Robbinsville
North Carolina 28771
(tricountytv@xxxxxxxxxxxxx)
----- 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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