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

2 Answers

Dcm where is the digital convergence module located on the JVC av56wp74 56. I want to remove to take to repair shop to replace my ic with stk392-150. I can't adjust my horiz red lines

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  • Anonymous May 20, 2008

    I have the same convergence problem (but with the Red). The Printed circuit board is behind the front speaker panel (remove 2 screws on each side plus 2 screws in the pull down access panel under the TV power on light). There is a center access panel with 4 screws, and the circuit board is right in the front. The 2 heat sinks are about 4 inches tall so you will see them easily. Originally I was looking for small chips , these are not small they are about 1 1/2" by 1" in size. There are 3 small connectors (red blue green markings) and 3 other connectors you will need to carefully remove. There is one connector that I could not remove from the board so I disconnected the other ends (2) of the harness. The board (approx 3" x 12") can then be removed.

  • samglo Sep 07, 2008

    The RED color on my 48" JVC I'Art Pro is non existent....only blue and green color modules are lit up, already removed panels and can easily see the 3 color modules. How do i remove the red one? the whole big thingy bolted in with 4 bolts? just the circuit board? please help so i can put a lil red spice back into my life!!!

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2 Answers

Thks for the info, i will try to be very careful. did not know that info before

Posted on May 12, 2008

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  • JVC Master
  • 8,617 Answers

It is located in the front of the TV behind the speaker grille and access panel its the small narrow board on the left looking from the front. PLEASE NOTE do not remove the back panel on that model with the power still hooked or operate that model without the back panel in place or you will harm the digital section of the TV and cause major problems that model has a safety feature that will wipe out the digital memory if the backis removed while the cord is still plugged in

Posted on May 10, 2008

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2 Answers

Projecting double images


When convergence output ICs got failed, tv shows double image or 3D like picture. Replace convergence output ICs in tv to fix the issue. Local tv repair shop will replace it for you.

Jul 07, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

My 48'' jvc colorconvergence is out of wack how do I fix this what part needs to be replaced if any


convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK-392-120 IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 23, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Convergence


Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s) JVC usually have a sperate smaller board for convergence

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 link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 16, 2009 | JVC Projection Televisions

1 Answer

Picture out of focus. lines in tv kinda jumping


Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

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 link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 11, 2009 | JVC AV-65WP55 65" Rear Projection...

1 Answer

Convergence adjustment isnt working, the screen is jumpping/jittering



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

Oct 05, 2009 | JVC Projection Televisions

1 Answer

JVC AV48WP30 convergence ic


I'm in the process of trying to replace both convergence IC's in my JVC also. I was able to buy both IC's (they look like black semi-rectangular components with 20 pins sticking out...like a computer chip only much bigger) at a TV repair shop for about $15 each. They were clearly labed STK392-110 (but could be 150 or 180 if you wanted to upgrade).

Jan 18, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

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

Jul 06, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Jvc convergence


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 18, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC Television


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 05, 2008 | JVC AV-56WP74 56" Rear Projection...

3 Answers

Convergence chips


The convergence IC or in a sense ,amplifiers and the resistor are output resistors... if they are burning up the current going through them is spiking too high... TO me this is an indication that the "convegence yokes" are shorted. These are coils around the tubes that control convergence. I would suspect maybe that these are shorted to ground somehow. This is my first guess for this problem

Feb 11, 2008 | JVC AV-48WP30 48" Rear Projection...

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