[TechAssist] Re: Sanyo DS25580 Short horz output
- From: tjanphyl@xxxxxxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 22 Jun 2005 18:35:38 -0400
I'm no engineer. I usually stay with the orig. value, until it is
found to be a goof. I usually just replace it with a good 105 degree
cap of the same value since it's affecting the drive time constant.
Many a HOT failed due to line surge.I think you compounded the issue
with a different transistor.After repair, heat test it as you go,
every 5 minutes or so.Do the finger test.
Phil Bader
----- Original Message -----
From: Shaun <satguy@xxxxxxxxxxxxx>
Date: Wednesday, June 22, 2005 6:24 pm
Subject: [TechAssist] Re: Sanyo DS25580 Short horz output
> I found an original D1879, do you think I should still change C408
> to the
> 4.7 mfd?
>
> Shaun
>
> Advanced Electronics
> 224 West Riverview Ave.
> Fort Morgan, CO 80701
> ----- Original Message -----
> From: "tvservice" <tvservice@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, June 22, 2005 4:12 PM
> Subject: [TechAssist] Re: Sanyo DS25580 Short horz output
>
>
> > I use 2sd1881 and increase the value of c408 from 1 mfd to 4.7 mfd
> > the specs on the d1555 are 5amps the specs on the d1879 are
> 6amps and
> 1881
> > are 8amps
> > Robert
> > tvservice@xxxxxxxxxxxxx
> > H & H Electronics Inc
> >
> > ----- Original Message -----
> > From: "Shaun" <satguy@xxxxxxxxxxxxx>
> > To: "tech" <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, June 22, 2005 5:01 PM
> > Subject: [TechAssist] Sanyo DS25580 Short horz output
> >
> >
> > > This set came in dead customer said it was lightning. I found
Q402
> (D1879)
> > > shorted and main fuse open. I replaced Q402 with a D1555, the
> set played
> > for
> > > about 5 hours then Q402 shorted again. I checked C408 (1 uf
> 160 volt)
> and
> > it
> > > was good but I will replace it this time anyway. I don't see
> any other
> > > problems. Does anyone think the new D1555 is a bad sub for this
> > application?
> > > When it shorted I felt it with my finger and it was very hot! tia
> > >
> > > Shaun
> > >
> > > Advanced Electronics
> > > 224 West Riverview Ave.
> > > Fort Morgan, CO 80701
> > >
> >
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