[TechAssist] Re: Sanyo DS25580 Short horz output
- From: "Shaun" <satguy@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 22 Jun 2005 16:46:48 -0600
OK thanks Phil, it's running now and seems to be staying cooler so far.
Shaun
Advanced Electronics
224 West Riverview Ave.
Fort Morgan, CO 80701
----- Original Message -----
From: <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, June 22, 2005 4:35 PM
Subject: [TechAssist] Re: Sanyo DS25580 Short horz output
> 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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