[TechAssist] Re: Horizontal output overheating.
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 16 Dec 2002 10:01:25 -0500
I always read that using two semiconductors in parallel will cause the
one of them to hog all the current, unless you install a small current
limiting resistor (perhaps 0.01 ohm or there abouts) in the paths of the
2 emitters. Has anyone else heard of this?
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: gary (at) number63.ca
teltek2 wrote:
>
> I agree...using 2 will put you into price range of OEM.
>
> Fix the fault..install OEM part, ship it. Done.
>
> -Ed-
> Tel-Tek Electronics
> Ontario-Canada
>
> teltek2@xxxxxxxxxxxx
> ----- Original Message -----
> From: <HSWAD@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, December 16, 2002 9:09 AM
> Subject: [TechAssist] Re: Horizontal output overheating.
>
> > Wouldn't it be about the same price to replace with the correct part?
> > Modifications put you in a responsible position . Hollis Bates, field
> > engineer-retired In a message dated 12/16/02 5:13:25
> AM
> > Eastern Standard Time, villyboor@xxxxxxxxx writes:
> >
> >
> > > Subj:[TechAssist] Re: Horizontal output overheating.
> > > Date:12/16/02 5:13:25 AM Eastern Standard Time
> > > From:<A HREF="mailto:villyboor@xxxxxxxxx";>villyboor@xxxxxxxxx</A>
> > > Reply-to:<A
> HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> > > To:<A
> HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>, <A
> HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> > > Sent from the Internet
> > >
> > >
> > >
> > >
> > > Villy Boor
> > > Boorelec Durban
> > > --
> > > Perhaps I am a wee bit off the topic but I have been finding many TVs
> > > with troubles after the horizontal output has been changed. What I find
> is
> > > if you get the expensive manufacturers transistor all is well, the
> generic
> > > fails. My tip here is use 2, parallel them up and there is no need to
> > > increase heat sinks as there will be less heat, the input inpedance
> drops
> > > so it is more stable, as yet after 2 years on sets where no faults were
> > > found and the transistor failed, I have had no returns. Your comments
> > > welcomed, Villy.
> > > On Sun, 15 Dec 2002 08:13:25
> > > Paul Medvetz wrote:
> > > >We have a Sony KV-32S35 , Set came in dead with shorted horiz.out,
> > > reg.Q601 and Q602, Replaced Q601,Q602, Q502, VDR601,R607,C502.Set now
> plays
> > > but Q601,Q602, get very hot just after three minutes,This set was in
> shop
> > > two months ago for shorted flyback and horiz.out transistor.Don't want
> to
> > > leave it on any longer I know it will short again,Also I did go over
> > > connections in horiz. thanks in advance for any help.
> > > >
> > > >Paul Medvetz
> > > >TV- Service-CO.
> > > >Hazleton,Pa. 18202
> > > >paulcho@xxxxxxxx
> > > >
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