[TechAssist] Re: CTC187CL3 blows Horz. output tr

  • From: "junior hurdle" <jselectronics@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 18 Aug 2003 01:31:19 -0400

the date code on this transistor is 9905
----- Original Message ----- 
From: "Al Gutz" <alg@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, August 17, 2003 9:13 PM
Subject: [TechAssist] Re: CTC187CL3 blows Horz. output tr


> Peter
>  Good idea to post the date code on any of this type stuff and everyone
> can keep it on file to ckeck. I have posted a couple.
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
>
> Peter oliver wrote:
> >
> > There is another possibility Where did you get your BUH517? I have found
> > that ones with date code 9556 are usually bad. they overheat and fail in
the
> > manner you describe. (interally they look like reproduction
parts--silicone
> > seal over the die, a tinned heatsink, and a 30% smaller die, the
original
> > had a Copper substright and no silicone)
> >
> > Peter OLiver
> > Tucson Radio TV
> >
> > From: "junior hurdle" <jselectronics@xxxxxxxxxxxx>
> > Reply-To: techassist@xxxxxxxxxxxxx
> > To: <techassist@xxxxxxxxxxxxx>
> > Subject: [TechAssist] Re: CTC187CL3 blows Horz. output tr
> > Date: Sun, 17 Aug 2003 20:08:13 -0400
> >
> > J'S electronics
> > Howells + RD
> > St. Michael
> > Barbados
> > Phone# 246-4298535
> > email jselectronics@xxxxxxxxxxxx
> > ----- Original Message -----
> > From: "junior hurdle" <jselectronics@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, August 17, 2003 2:41 AM
> > Subject: [TechAssist] CTC187CL3 blows Horz. output tr
> >
> >  > Hi techs
> >  > I replaced the FBT , the hot (BUH517) and C709 (47mf @ 25V) in this
> > ctc-187CL3 rca.
> >  > Before I could adjust the screen and focus the HOT shorted out again.
I
> > replaced the
> >  > HOT again to see if it was heating rapidly. After 30 seconds I
checked
> > the
> > transistor
> >  > and found it to be very hot . I plugged the set in again and before I
> > could turn it on the
> >  > HOT shorted out again. I checked all components in the horz.circuit
as
> > well as the
> >  > signal going to the horz. output but they all checked ok.
> >  > could any one tell me what could be causing this transistor to keep
> > shorting?
> >
> >  > thank you
> > .
> >  > junior Hurdle
> >  >
> >
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