sony kp53s25

[brian]

tv has one vertical line at bottom of picture....replaced vertical ic
and checked associated components and still no luck..any ideas?
thank-you in advance.....brian

 

[Shoreline Electronics]

Are you actually getting a picture? Or are the CRTs black and you are
seeing this line by looking down into them?


--
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
[email protected]
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd

 

[Jack]

Perhaps you are confusing horizontal with vertical like so many do...
Vertical is up and down, horizontal is left to right or across.
If you have a vertical line (up and down) your problem would be in the
horizontal deflection, not the vertical.

 

[Arthur Jernberg]

If the voltages are not correct at the vertical output it is possible to
have a horizontal (left to right) line at either the top or bottom of the
raster, of course the set will go into protect because vertical scan is not
being realized. Confirm the presence of proper voltages at the vertical ic
and check the caps in both the deflection and supply circuits. BTW in
extreme cases, if the beam hits the neck of the crt, it can cause fracture
of the tube envelope.

 

[brian]

tv has one vertical line at bottom of picture....replaced vertical ic
and checked associated components and still no luck..any ideas?
thank-you in advance.....brian

set has nopicture i have to look into the crt to see line left to right

 

[John Del]

Subject: Re: sony kp53s25

From: [email protected] (brian)
Date: 10/29/03 5:49 AM Eastern Standard

set has nopicture i have to look into the crt to see line left to right

You need to scope the vert yoke to see if you have deflection or not. Sonys of
this era mute the video until the IK catches up. The only thing visible during
this time is a line at the top of the target. From what you've posted so far,
we don't know if it's a video or deflection problem.

John Del
Wolcott, CT

"Nothing is so opportune for tyrants as a people tired of its liberty."
Alan Keyes

(remove S for email reply)

 

[brian]

set has nopicture i have to look into the crt to see line left to right

one new thing i discovered is if i turn screen control up i have full
vertical....(top to bottom) i just replaced ic 301 cxa1477as and now
have vertical ,sound, but no video....justbright screen w/
retrace.......i think im making progress but now video has me stumped

 

[David]

Do a Google search for Sony AKB, Sony blanking video, etc for LOTS of
information. Sony uses the same blanking system no matter PTV or DTV.

My gut tells me that if the sound goes up and down, and you see the
AKB blanking lines on the face of the tube (no osd or video), you have
either a bad tube or a problem in the AKB circuit. Or more remotely a
problem with the hsync or vsync getting back to the jungle ic and
system control.

David