[TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need sub
- From: "S. Pasher" <spasher@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 6 Sep 2004 10:07:18 -0230
Where the H/O section start to heat to point were the transistor burns
itself out. Some times it caused by lack of drive. The Horz. drive
transformer bad or the 1uf cap across the transformer will do it.
Buck Pasher
Buck's TV
Gander Newfoundland
Canada
709-256-7738 (Fax & Phone)
----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, September 05, 2004 11:44 PM
Subject: [TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need sub
> What is thermal runaway in the H/O section?
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of S. Pasher
> Sent: Sunday, September 05, 2004 6:48 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need
> sub
>
> I use 2SD2539 as a replacement for a lot of H/O's. In the Daewoo it is
> recommended that the 2SD1880 be replaced with it. I runs a lot cooler
> then
> 1880 and the Daewoo's problem is there is thermal runaway in H/O
> section.
>
> Buck Pasher
> Buck's TV
> Gander Newfoundland
> Canada
> 709-256-7738 (Fax & Phone)
>
>
>
> ----- Original Message -----
> From: "Jorge Camboni" <geo@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, September 05, 2004 6:47 PM
> Subject: [TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need
> sub
>
>
> > Best sub is 2SD2580- pretty good ones are 2SD2539 and 2SD2553 (proven
> > many times, usually run almost cold).
> > The 2SD1880/81 may work, you have to try them and monitor the
> temperature,
> > they're lower gain transistors than 2578/80 series which are much
> newer.
> > All of them have an integrated damper diode.
> > There are more subs, of course, those are the most popular (and
> > unexpensive) ones.
> > Jorge
> >
> > At 07:44 p.m. 04/09/2004 -0500, you wrote:
> > >I need a sub for transistor D2578 out of a Sony TV. Thanks.
> > >
> > >Kenny Barnes
> > >Kenny Barnes tv
> > >928 South Marshall st.
> > >5154325250
> > >Boone, Iowa 50036
> > >
> > >
> >
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> >
> > Jorge Camboni, GY Electronics, Richardson, TX
> >
> >
> >
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