Question about Sony Grand WEGA KDP-65WS550 65" Rear Projection HDTV

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LINEARITY CORRECTION ISSUE

WHILE TV IS WARMING UP ALL FOUR SIDES ARE BOWED TOWARD THE MIDDLE WHILE THE CORNERS ARE OK. AFTER TEN MINUTES EVERYTHING LOOKS NORMAL.

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Convergence problem, common on rear PTV.
This is a excellent TV. Worth repairing it.

Posted on Jun 01, 2010

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up


Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

Some masks either have a material or a defect causing the dome effect----Not likely to be anything else---a Pin amp problem will not usually act the way you describe but a shadow mask inside the picture tube will act exactly that way.

Dec 02, 2012 | Televison & Video

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We have a Hitachi 53udx10b tv. Recently it was


Projection sets have two very common problems.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 05, 2009 | Hitachi 53UDX10B 53" Rear Projection...

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I have a JVC 48' widescreen tv approx. 7 - 8 yrs old. the picture is now extremely bad all of the colors seem to be out of wack and the picture bows inward toward the middle at the top and bows inward...


There's a miror or one like this might have a ''aluminium sheet'' miror.
Open the upper back cover to see what going on there, pretty sure something run out of place...

Sep 08, 2009 | Televison & Video

1 Answer

Picture bows in towards middle


YOU HAVE A ALIGNMENT PROBLEM, ON YOUR BOW OR PINCUSION, OR A BAD RESISTOR, THE COLORS NOT LINING UP COULD BE A CONVERGENCE PROBLEM. I ADVISE YOU TO LET A EXPERT TO THIS DUE TO THE HIGH VOLATE ON THE CRT(PICTURE TUBE)

Jun 07, 2009 | RCA Televison & Video

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Philips 46-inch Rear Projection with bowed image?? slight distortion



You have a convergence problem. Here are some of the most common symptoms. 

Screen looks 3D
One or more colors can't be adjusted when when using the convergence menu. 
Screen is bowed in but stationary.

Solution: 
You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kit for your exact model. The kit inlcludes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself. Its an easy fix. 

Jul 02, 2008 | Philips 46PP9302 46" Rear Projection...

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Picture is bowed down from top left corner to top right corner and bowed up from bottom left corner to botton right corner. Colors are seperated a little in corners and middle top and middle bottom.


Convergence ICs are faulty what is your model number? I can post which ICs you need and where you can get replacements that come with free instalation instructions so you can do the repair yourself

May 07, 2008 | Televison & Video

1 Answer

Slight bowing of picture


Only on newer TV's, yours (I dont think)has the adjustment, if it does it would be in the menu area.

Apr 22, 2008 | Sony KV-36XBR450 36" TV

1 Answer

Distorted picture


On the middle circuit board towards rear is a metal wavy plate.On the back side(actually towards screen when looking from rear of unit),the middle screw has a ground wire(light brown) that is loose.

Apr 08, 2008 | Mitsubishi WT-46809 46" Rear Projection...

1 Answer

Letterbox


Distorted Picture. All wide angle Cathode Ray Tubes have to have magnets around their periphery at the back. They are fixed on metal strips so they can be moved slightly. The effect is to alter the shape of the picture towards the corners. Try this, but remember their original position in case it gives the wrong change in shape (linearity). There are also parts of the circuit which control linearity by altering the shape of the line or frame scan waveform. In your case it is the line scan which needs correction and there should be several adjustable components. In some TVs, the effect the edjustment has is clearly marked by a symbol or word. You may need special tools and be aware of high voltage parts. Unplug the TV while you move a magnet etc.

Oct 17, 2006 | Sony KV-36XBR400 36" TV

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