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

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Jvc 65 inch I'art tv

What does it mean when there are blue shadows across the screen on all channels?

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  • 132 Answers

1024x768 Normal 0 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

Posted on Jul 07, 2008

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I have a 65 inch Hitachi projection TV and all of a sudden lines apperaed on the screen that runs across the upper part of screen. I tried using the"Magic Focus" setting to get rid of these lines...


The tv Magic Focus button don't solved these R,G,B colors lines mis alignments problems.Mean ur tv have a convergence pictures problems,it is dead.Ur tv now have any colors lines like R,G,B mis alignments,have a colors shadows picture or a 3D pictures look alike?Yes,mean ur tv convergence board it is dead to causes all of these pictures problems.The tv convergence board must have to repair like replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost u like $300-350 for parts and labors.

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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

Sony 65 inch screen tv


Yes the red tube is shorted. I will post a link to the site where I work as they have an entire AV48WP30 with a bad tuner they are selling parts off of including the Tubes. they also provide free info on how to switch out the tubes as a unit which is a fairly easy job. Heres the link.

http://servicemanuals.vstore.ca/

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1 Answer

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I have a JVC and my screen is getting darker and darker. There is also a blue shadow on people when they are in the frame.

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1 Answer

65 in.JVC bad picture


You may have a convergence problem that means, there may be convergence ic's bad or related components.
If you know something about tv's, try checking things out.
You can get a repair manual from websites to download.
If you do not normally fix tv's the best thing is to call a tv repair technician.

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1 Answer

Blue shadow across my screen


Go into the convergence function from the menu and see if it works. If it does not then the convergence board has a problem. JVC still sells the part.

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1 Answer

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You are going to need a full convergance alignment to rectify this issue.

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1 Answer

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Perfect! That is typically called "Ghosting" where there is a faint image shadow behind the image on your screen. I'm glad you were able to get it fixed!

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JVC 36 inch televivision i bouhgt it about 6 years ago


The lightning probably zapped the tuner in you set. If no signal is present the screen is muted (BLUE).This is a feature to prevent your seeing snow on the screen. Stargazer

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