[TechAssist] Re: Sony KV27TS27-Intermittant No Video
- From: "Video Clinic- Pana" <videoclinicpana@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 5 Feb 2002 22:00:38 -0600
Does this set have the seperate if module next to the tune if so unsolder
it take off the shield and resolder ...particularly the transormers and
other components. Hope this helps
roy aka videoclinicpana@xxxxxxxxx
----- Original Message -----
From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
To: "TechAssist" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 05, 2002 9:45 PM
Subject: [TechAssist] Sony KV27TS27-Intermittant No Video
> 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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