[TechAssist] Re: Hitachi 60sx1k -AP 14 chassis. Big Pix Bending, poor sync
- From: Mike Barnett <passthecash@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 12 Oct 2001 07:21:45 -0700 (PDT)
Damon, i have the service manual in PDF if you want it, Also have just
about any manual for Hitachi.
Mike
On Thu, 11 Oct 2001 19:54:47 -0500, techassist@xxxxxxxxxxxxx wrote:
>
> Thanks Tom, you were right. Somebody mentioned a Capacitor Kit used to
> repair the comb filter. Any part #'s or cap numbers would help, there's
a
> kajillion caps in there.
>
> Thanks,
> Damon Brunger
> damon101@xxxxxxxxxxxxxx
> Telrad Electronic Services
> Ft Wayne, IN 46815
> ----- Original Message -----
> From: "hermantv" <hermantv@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, October 09, 2001 11:41 AM
> Subject: [TechAssist] Re: Hitachi 60sx1k -AP 14 chassis. Big Pix Bending,
> poor sync
>
>
> >
> > Leave the PiP alone...repair the Comb filter.
> > Tommy Herman...Herman TV
> >
> > ----- Original Message -----
> > From: <damon101@xxxxxxxxxxxxxx>
> > To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, October 09, 2001 9:24 AM
> > Subject: [TechAssist] Hitachi 60sx1k -AP 14 chassis. Big Pix Bending,
poor
> > sync
> >
> >
> > > Hello everyone,
> > >
> > > Recently worked on a Hitachi PTV ap14 chassis with darker than normal
> > picture, no or erratic vertical sync and horizontal bending only at the
> > bottom 1/3 or top 1/3 (not at the same time).
> > >
> > > I tested the sync signal at the vertical output and horiz drive using
> the
> > NTSC generator and found that they were locked to the generator. Also
> tested
> > the power supply and found about 2 volts of ripple on C952, C957 &
C958.
> > Gonna replace those caps...
> > >
> > > I checked the PIP and here is my concern: The small Picture is not
> present
> > using video 2 (Pip's main source is only Video 2) and is replaced by a
> green
> > field. Video 2 is present on big picture so the failure point must be
in
> the
> > PIP. The customer doesn't care to have the PIP replaced unless it fixes
> his
> > scrambled Big Picture. Has anybody seen the Big Picture lose sync in
the
> > Pip? Yet the horiz/vert outputs are locked to the sync. Slightly weird
set
> > of symptoms, I would have guessed bad sync at the outputs and looked at
> > power supply, or the video jungle IC for starters. Any help would be
> > appreciated, I only get 2 or 3 Hitachi units a year.
> > >
> > > Thanks in advance,
> > > Damon Brunger
> > > damon101@xxxxxxxxxxxxxx
> > > Telrad Electronic Services
> > > Ft Wayne, IN 46815
> > >
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> > >
> >
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> >
>
> Help make your TechAssist online repair tips
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Get It Fixed At
Rochester Electronics
630 West Ridge Rd.
Rochester, NY 14615
716.663.6870
www.RochesterElectronicsRepair.com
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