Question about Sony FD Trinitron WEGA KV-34XBR800 34" TV

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Picture bowing in center from top down about 1 inch in middle, ok at edges, also looks as if degause is inoperative with colors on left and right (purity) --------------------------------___________________------------------------------ like that, I checked continuity on degause coils, ok. checked voltages to degause coils, ok. Also I can hear the degause circuit at startup, however set looks as if degause circuit is not working. Can the bow be taken out from the service menu? How to enter service menu? Whats wrong with purity? Sony kv-34xbr800

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This is a convergence problem. Look for poor connections at the convergence ICs. Try resoldering the pins on the ICs. If that does not resolve the problem, replace the ICs.

Dan

Posted on Jul 28, 2009

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1 Answer

Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

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Problem #2 CRT Fluid has clouded over. Symtoms
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Sony 46 inch proj tv picture is bowed in the middle and color is


Problem #1) Convergence

Symptoms:
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Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
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You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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1 Answer

Bowed picture and color misalignment


Replace both STKS ICs Ck low ohm resistors 2.7ohms most of the time there will be 2 of them bad.

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1 Answer

Bows on sides


Try degausing the set with the system software. if this doesnt fix it you will have to degause the set with a professional tool.

Jan 27, 2009 | Mitsubishi VS-55601 55" Rear Projection...

1 Answer

Projection T.V. Picture


Replace Both of your STK ICs convergence ICs STK392-110 use 150s Better ICs Call Mats 1-800-628-1118 Also RK42 RK46 RK48 RK50 RK54 RK58 RK60 will have to get back to you on resistor values

Jul 21, 2008 | Hitachi 60SX12B/13K 60" Rear Projection...

1 Answer

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

Convergence issue with blue


You need to replace the convergence Ics located up front behind the speaker grille numbers STK392-110 you can get replacements at the following link and they provide free tech support and instalation instructions with pictures. heres the link.
http://servicemanuals.vstore.ca/

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1 Answer

Covergence and Bowed Picture Problem


can you adjust any color of convergence in user menu blue, or red up or down left or right. if you can make any up or down left or right adjustments on any color then the likelihood it wont be a convergence ic. it would be a output resistor. so see if you can get any movement. with it being bowed i was suspect an convergence ic.

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1 Answer

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture


The most likely cause is shorted convergence chips and possibly a few pico fuses.

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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

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

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
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Problem #2
Another common problem is dull or washed out video.

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

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You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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2 Answers

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture


The convergence ICs probably have a cracked solder joint on the foil side of the circuit board. Re-flowing the the solder would help. I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts. To fix this yourself, you will need to be able to identify the two convergence ICs, have a basic knowledge of electronics and be able to use a soldering iron. You will also have to do an alignment through the service menu.

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