[TechAssist] Re: fix? Toshiba CF27E55, TAC9510 line. no vertical deflection
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 3 Jun 2004 17:45:36 -0400
Zenith fused the vertical circuits in their first solid state sets after
cutting off a few necks. Right away we had to replace them with a larger
fuse to keep them working.
For some reason, design engineers don't seem to take into account naturally
occurring spikes that will take out a small fuse. Used to have stereos that
had 1A line fuses in them, which would seem like enough, since they rarely
drew more than 150 ma when you measured the line current. But they kept
coming in with blown fuses until we started replacing them with 2A fuses.
Russ Hoyt
Hoyt's TV
Exeter, NH
----- Original Message -----
From: "tvservice" <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 03, 2004 5:30 PM
Subject: [TechAssist] Re: fix? Toshiba CF27E55, TAC9510 line. no vertical
deflection
> Fatigue!
> seen it many times , just replace fuse and no call backs
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message -----
> From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, June 03, 2004 12:28 PM
> Subject: [TechAssist] fix? Toshiba CF27E55, TAC9510 line. no vertical
> deflection
>
>
> > Fix?
> > The vertical output IC "Q301" has a GMA 500mA fuse in front of it,
> > "F301" which was open. Replaced it and vertical restored.
> > What usually causes this to open? The vertical is perfect. I'm sure
> > there is a culprit somewhere!
> > Phil Bader
> >
> > Phil Bader wrote:
> >
> > >No Sams. Not in TechCD or my archives. Seems simple.Having a senior
> > >moment...
> > > Need some kind of partial schemo of vertical, or the Vcc source from
> > >fly to the IC.
> > >Thanks,
> > >Phil Bader
> > >
> > >
> > >
> >
> > --
> >
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> >
> >
> >
>
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