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

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JVC AV-56WP74 56 in. Rear projection blurred image

I have two arced lines on the top of my screen they look green and pink and cause the picture to be blurred. Almost like a 3d image in that area. Bottom of the screen is fine up through the middle and it startsgetting worse the farther up. Any help would be greatly appreciated. I know nothing about fixing these but willing to try anything. Some f the postings are talking about adjusting settings. This just appeared after 6months of working fine. Anybody know if these adjustments might help? THanks, Rick rtkosi@embarqmail.com

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  • rtkosi Jun 27, 2008

    Thanks to the many posts on this site I was able to get the ICs and solder them in and the problem went away! I think I might have crossed the red and blue wires leading to the convergence board though. When I use the DVD player the screen is red instead of Blue. Anybody know about that? Is it possible to just plug the wires in the wrong place and the TV still work?

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Check that the 3 output plugs are in the right sockets (Red, Blue, Green) There is usually a felt pen colored mark on a white tape on the plug in wires. The Board sockets are marked Red, Green, Blue.

Easyab

Posted on Jul 07, 2008

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PANASONICV that now has a "blurred" screen. We can see the channels but it looks like it's has a shadow around the images. The screen in in a red hue with green blur. TX-51P100H 51"...


Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from www.TvRepairKits.com and do the repair yourself. Its a fairly easy DIY fix.

Jul 29, 2011 | JVC AV-56WP74 56" Rear Projection...

1 Answer

My JVC AV-56WP74 is showing green and purple waves at the top of the screen what is defective?


Common problems with the chassis used in this model for complaints such as this are caused by damage in the convergence circuitry (since there are three separate picture tubes, each mounted in a physical location different from the others, the light each tube "throws" on the screen falls in a different physical location on the screen; the electronics of the convergence circutry force the red & blue light information to "converge" on the image produced by the green tube, which being physically located in the center of the other two is the "master" image), usually associated with the IC's used as amplifiers for the convergence circuits (this model uses STK392-110's) and with the high-wattage, low ohmage resistors used as biasing components for these amps

Mar 04, 2010 | JVC AV-56WP30 56" Rear Projection...

1 Answer

BLURRED DOUBLE IMAGES


need to replace convergence ic stk392-110

May 07, 2009 | JVC AV-48WP74 48" Rear Projection...

4 Answers

Blurred TV - double vision with red hue


I was searching online about what could be the problem with our TV and I came across your page. We have a 52" JVC Projection TV that now has a "blurred" screen. We can see the channels but it looks like it's has a shadow around the images. The screen in in a red hue with green blur.

If you have any suggestions on what caused this and what we can do to have this fixed, I would greatly appreciate your advice.

Sep 07, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Wavy green lines at top of tv


1024x768 Normal 0 Convergence


When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jun 02, 2008 | JVC AV-56WP74 56" Rear Projection...

2 Answers

JVC AV-48WP34


The convergence ICs need to be replaced. I can post a link where to get replacement ICs along with free step by step instructions so you can do the repair yourself. Its an easy ,common repair , however a shop will be around 300 to 400

Mar 28, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

RED AND GREEN DOUBLE AND BLUR PICTURE HELP PLEASE


You have a convergence problem. Components are shorted out and must be replaced. Unless you're a technician, there's really nothing you can do at this point.

C-Dog

Feb 03, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Bluring at the top section of the TV


http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Nov 11, 2007 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Jvc tv picture quality


sounds like your crt tubes...meaning Red, Green and Blue are out of alignment...or possibly 1 of the crt's is burned out.

Jan 29, 2007 | JVC AV-48WP30 48" Rear Projection...

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