Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Help Last year we had the convergence fixed. Last week when we turned it on, there was a minute or so of a separation of colors (red and green). Then, a day or two later the screen went black and it made a clunking sound for a few minutes. Now it does nothing but the power light slowly blinks off and on. We have DirecTV (since March).

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It sounds as if your convergence ICs have failed again,However if you didnt replace the convergence resistors with the ICs that is most likely the cause of early IC failure. There is a quick test to determine if the ICs have failed. Remove the front speaker panel and access panel up front, and you will see the convergence panel with the two black heatsinks. Directly in front of those heatsinks are three wire clips that are for the convergence yokes, Unplug those three wire plugs and try turning on your set. If it comes on the ICs have failed, and the ICs and resistors should be replaced as a kit. You can get the repair kit for the JVC rear projections at the following link with free instructions. Heres the link.
http://servicemanuals.vstore.ca/
Let me know if you need more information.

Posted on Jul 24, 2008

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Re: Toshiba 65 in Cinema Series - 12 years old. Color Separation. Green bow at top center of screen, red and blue double images tilting upwards toward sides. Sometimes clears unassisted after set has...


projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


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Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

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TV set after fluid change

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69189a5.pngSOLUTION

You 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

Jan 20, 2011 | Toshiba 65H82 65" Rear Projection...

1 Answer

Picture colors scrambled


Ur convergence it dead,Know how to solders?Buy a convergence kit to repair.These websites have the kit.Tv repair World.com,Tv Repair Kits.

Dec 12, 2009 | Toshiba 57H82 57" Rear Projection...

1 Answer

Red and green have separated. is this fixable?


yes this can be fixed
it is the convergence IC's that controls each color image alignment ,also other components(resistors , diodes , capacitors , ect..) in circuit with these convergence IC's(STK's) also need testing to see what other component has also failed or needs replacing.

Mar 19, 2009 | Zenith R57W46 57" Rear Projection...

1 Answer

Red and Yellow blurred picture


I had the same problem this week. I tried the convergence thing but it was impossible to fix. I still needed the repairman. He changed two convergence units ($325, parts and labor). Then the tv was still doing the same thing. We had to adjust the convergence and now everything is perfect. You will need your converter

Mar 01, 2009 | Akai PTH5498 54" Rear Projection...

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2 separate colors on screen


sounds like your convergence IC's have finally gone bad.. they seem to last 5 years on average.. have a look here: http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Dec 19, 2008 | Sony KP-53V75 53" Rear Projection...

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Picture turns to red & green and becomes blurred.


This is likely solder connections cracking on your convergence ICs. If you can bump the tv and it goes back to normal, it just needs resoldering, but if it doesn't, then it needs the ICs replaced. If the convergence is out, you will see a bowed picture and the red, green, and blue will be separated. Worth repairing if you can find a company to do it affordably, I can help you repair yourself if you have disassembly and soldering skills.

Dec 03, 2008 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

Mitsubishi wt-46809 not turning on


Your convergence amp ICs have most likely failed and that will shut the TV down. You need to replace both convergence ICs they are both STK392-570 you can get replacement ICs with free instalation instructions at the following link.
http://servicemanuals.vstore.ca/

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Double vision on my samsung HDTV 1080i


If one or more of the colors, red, green or blue have separated from each other and you can`t correct the problem using the convergence procedure as described in the users manual, that would indicate you have a convergence problem. Bad solder connections on the convergence output chips are common. If the set had a rough ride down the stairs while moving, that may have facilitated in exposing a preexisting condition. However, the most likely cause is the natural failure of one of the convergence output chips and or related components and not the move. The fix is to have a qualified technician address the problem. This is not a do it yourself job.

Feb 22, 2008 | Projection Televisions

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Warped Picture, Separated colors


Each color (red,green & blue) has an amplifier IC (STK-).
When there is a convergence issue,the first step is change both
IC's for reliability. Then check for open fuses devices,usually
pico fuses.Then re-check convergence alignment.......T.

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