[TechAssist] Re: Sony KV27TS27-Intermittant No Video

  • From: "al m" <ampm@xxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 7 Feb 2002 09:31:40 -0600

i've seen a problem like that where the sceen gets darker from one side to
the other like black streaks. it was the 200v filter cap was open. one leg
was burned off.
al marquardt
ampm@xxxxxxx


----- Original Message -----
From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, February 06, 2002 9:39 PM
Subject: [TechAssist] Re: Sony KV27TS27-Intermittant No Video


>
> No, it isn't a power problem, it's a video problem.
>
> Damon Brunger
> damon101@xxxxxxxxxxxxxx
> Telrad Electronic Services
> Ft Wayne, IN 46815
> ----- Original Message -----
> From: "Eric Manuel" <tvman@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, February 06, 2002 7:46 AM
> Subject: [TechAssist] Re: Sony KV27TS27-Intermittant No Video
>
>
> >
> > Hi Damon try replacing  IC601 may be you trouble..Eric
> >
> > Damon wrote:
> > >
> > > Hello everyone,
> > >
> > > We' ve had a KV27TS27 unit into our shop several times with an
> intermittant problem described by the customer as "black fingers starting
on
> the right side of the screen and progressing to the left side".
> > > I finally saw what he was describing, so here are the symptoms: TV
runs,
> sound is ok & not affected. The video does start to go black on the right
> side of the screen (it actually looks like the video breaks down or goes
> black). The picture that is viewable is properly synced, has good
color/luma
> and although I'm not sure I think the OSD is always ok when this occurs.
> > > I may have seen this problem before, as I believe that the video
jungle
> or some cap connected to the jungle is responsible for the video dropping
> down to black.
> > >
> > > If you were to look at the symptoms using a scope set to the horiz
rate,
> I would say the video would start to drop down to the black level starting
> on the trailing edge of the line and progressing to the leading edge of
the
> video signal (starts on the right and progresses to the left).
> > > I wish I was able to test this failure on the Video 1 and Tuner
> settings, unfortunately I could not verify if it occured on Video 1, only
> tuner. When it started to return the video would progress from the left
side
> in "snow like dots" back to the right side slowly.....then BOINK! all the
> picture would pop back in. Sorry about the long-winded infomercial, but
this
> has been REAL intermittant!!!
> > >
> > > Has anybody seen this symptom? Is it possible that the Video Jungle
has
> had this as a symptom?
> > > Has anybody possibly experienced a sync or blanking signal failure
> affecting the video jungle, yet providing good sync out to the crt??
Already
> looked at both Sony and Tech Assist Tech Tips: C570 for a TS11, D518/R587
> for a TS20, and Q301 or IC301 (add D308) for the TS27 models.
> > >
> > > Your experience and opinions regarding this is VERY Much APPRECIATED!
> > > Thanks!
> > >
> > > Damon Brunger
> > > damon101@xxxxxxxxxxxxxx
> > > Telrad Electronic Services
> > > Ft Wayne, IN 46815
> > >
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>
>
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