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Convergence adjustment isnt working, the screen is jumpping/jittering

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This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See below for more detail

http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Posted on Oct 05, 2009

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1 Answer

Picture is bowed at the top and bottom of the screen. The "Perfect Focus" option does not work to fix this. Is there a way to manualy adjust the picture


If the perfect focus isnt working its caused by failed convergence. You can get the convergence board from www.tvrepairworld.com its under the Samsung / Akai circuit boards.

Mar 30, 2011 | Akai PT5598HD 55" Rear Projection...

1 Answer

Colors converge will not adjust. What can be done?


Xpertis,
When the convergence will not adjust after you know you have set them correctly using your TV's convergence adjustment, your convergence board went bad. You can either repair it yourself with kits sold online (links below) but unless you know how to solder very well, opt for a repair guy. Your model will cost between $350 and $450 if you hire someone.

http://www.tvrepairkits.com/xcart/product.php?productid=20095&cat=0&page=1

http://servicemanuals.vstore.ca/product_info.php/pName/hitachi-dp-14g-43uwx10b61uwx10b-convergence-repair-kit/cName/convergence-repair-kits

http://servicemanuals.vstore.ca/product_info.php/pName/hitachi-dp15-convergence-upgrade-kit/cName/convergence-repair-kits

If you like to tinker but not dwell into the soldering world, try finding the same model for free or dirt cheap on a web site like www.craigslist.org that still works but like where a kid jumped into the screen!, and swap out the board.

Good Luck!

-Chris

Sep 07, 2010 | Hitachi 57F500 57" Rear Projection...

1 Answer

I have a model av48p776 jvc I am getting jitter lines across the screen more often than not and the bright comes and goes what do I need to do to fix it I would hate to get rid of the TV I just bought it


JVC AV48P776 Jitter and Brightness Varies

Check for convergence failure. Convergence Gallery Try adjusting convergence in user menu. If convergence display is messed up or adjustments do not work correctly, you have an Intermittent short circuit within an STK IC.

Look at menu screen with an unused input (antenna or video). If menu is stable and clear, TV may be OK and you may have a signal input problem.

If it is not poor quality input signal or convergence problem, someone has to troubleshoot to determine if it is a Video, Processing, Power supply or CRT related problem.

Most likely convergence.

easyab

Feb 28, 2010 | JVC AV48P777 Television

1 Answer

What causes the image on the screen to jitter


Sounds like bad convergence ICs. They are complicated to replace but a good tech should be able to do it for about $100. Let me know how this works out.

hardrocko

Jan 31, 2010 | Mitsubishi VS-70705 70" Rear Projection...

1 Answer

Hour glass cannot adjust red horizontal convergence


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,Pioneer 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
*Colors wont align
*Screen may look distorted or warped
*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

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

Oct 09, 2009 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Samsung pcj522r


If they tested the convergence board and thats ok, the only other Items it could be are the Digital convergence unit or the Velocity comando units that control the convergence yokes. If the convergence isnt adjustable with magic focus adjustments wont help it. Is the repair shop an authorized samsung repair facility? If you need more assistance let me know.

Jul 26, 2008 | Televison & Video

1 Answer

Issues with the big screen


This is essentially a convergence problem and will continue to get worse. If you can solder, try resoldering the pins on the convergence ICs. If that fails to resolve the problem, replace the ICs. These are large black ICs attached to a heatsink and should be marked STKxxx.

Keep us posted on your progress.

Dan

Jul 14, 2008 | RCA Scenium HD65W20 65" Rear Projection...

1 Answer

Jitter and tearing on bright pictures


1. VERT JITTER/HORZ UNSTABLE-CHECK 'GE' CONNECTOR PIN 5 FOR 1VPP Y SIGNAL INTO PIP PCB THEN CHECK 'GE' CONNECTOR PIN 11 FOR 1VPP Y SIGNAL FROM PIP PCB. IF SIGNAL AT PIN 5 IS GOOD AND PIN 11 IS CLIPPED OR REDUCED. CHECK ALL ELECTROLYTICS (I.E.C7001, C7014, C7026, C7036) AND ALL CONNECTING TRACES TO THESE CAPS FOR CONTINUITY 2. HORIZONTAL TEARING, VERTICAL JITTER. SIGNAL RELATED CONDITION. APPLY FOLLOWING CIRCUIT CHANGES ON PCB-SIGNAL: A. REPLACE R2K8 WITH A 1K RESISTOR (BASE OF Q2B2). B. REPLACE R2K3 WITH A 47 OHM RESISTOR (IC201 PIN 50). C. ADD A 100PF CAPACITOR FROM BASE OF Q2B2 TO JUNCTION OF R2L0 AND R2K6 (GROUND).

Jan 21, 2008 | Mitsubishi VS-60611 60" Rear Projection...

1 Answer

Jittering screen


Chassis will need to be pulled by a skilled technician.Some specific area hand-soldering is needed and the STK convergence IC's need changing w/OEM or better quality parts.You have a good set worthy of repair.

Sep 26, 2007 | Toshiba 61H70 61" Rear Projection...

1 Answer

TV Flickers up and down and screen is shifted to the right w/ red color dominating the screen.


the last hitachi that had this problem i fixed it bad finding bad solder conenctions throughout the board that the convergance ic's are on, also i foind some on the two main board in my repair. hopefully resoldering the convergance foard will fix the jitter or jumping around problem. if the picture is too red you can also try turning down the screen control slightly. good luck

Jan 02, 2007 | Hitachi 51F500 51" Rear Projection...

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