JVC AV-56WP74 56" Rear Projection HDTV-Ready Television Logo

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

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JVC AV-56WP74 Problem

My TV one day started flickering and a blue shadow/outline has been disfiguring my picture ever sense. All of the images on my set have this blue shadow that doubles the image. I ran auto convergance but it didnt help what so ever. Is this fixable

Posted by Chris Oakley on

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Anonymous

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Yes, one of your convergence IC's have gone bad. They are located on the convergence board inside the tv and there are two of them. They are inexpensive and easy to replace if you know how to solder. Watch out for the JVC booby trap sensor on the dvi input card. Don't run the tv with the back panel off unless you have disconnected the DVI card from the main board. I would even cover the little sensor with black electrical tape. Then it is safe to work on the tv when it's open and on. Well safe for those who know what they are doing.

Posted on Aug 15, 2007

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Anonymous

Yes had same problem must have convergence chip replaced cost 300.00

Posted on Jul 29, 2007

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Related Questions:

0helpful
1answer

The picture is showing multiple images with red, green and blue rainbow effect. The picture is also bowed on the top and bottom

This is whats called a convergence failure. You will need to call in a repair shop or goto sites like www.TvRepairKits.com hthat ave the parts to fix this yourself. Its a common failure on projection TV sets.
0helpful
1answer

JVC AV-56WP74 56 in. Rear Projection red projector is not showing images and big red line in tv

If the red line looks like a swoosh of red across the screen it may be the convergence Ic having an issue.
0helpful
1answer

Convergence is out...trying to manually adjust but only have blue and green lines....no red...how can i fix this?

Tv have 100% convergence problems,it dead.The tv have colors lines R,G,B mis alignments,have colors pictures shadows or 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts on the tv convergence,must be replaced to solved the tv pictures convergence problems.The shop,will cost u like $300-350 for parts and labors.
0helpful
1answer

Picture issue

you may want to try to reconverge the picture there should be a control button on your remote to readjust the picture
0helpful
1answer

Jvc 65 inch I'art tv

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
1helpful
1answer

Jvc tv model av-56wp74

1024x768 Normal 0 Won’t start

The power supply has an automatic shutdown circuit that senses a shorted component and excessive current flow.

If you can access the convergence board and remove the plugs one at a time (red, blue or green) for the convergence output, the TV may start up and show a picture with the unplugged color misaligned.

This confirms a short in the convergence output. The convergence IC failure can show up as coloured outlines or power supply shutdown.

If this does not help, then there is some other short circuit in power or deflection circuits. You need a technician to troubleshoot HV or power problems.

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

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


0helpful
1answer

TV PROBLEMS

If the images are different colors (red,green,blue) then the convergence has diverged. Some TV allow re-convergence through the menu screen, older sets my need to be physically adjusted (aimed) to clear this up. a strong knock to the TV may have cause this.
1helpful
1answer

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.
0helpful
1answer

Magnovox big screen hdtv

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
0helpful
1answer

Blue Shadow on my AV-56WP74 56 in JVC

http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
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