Question about JVC AV-48WP30 48" Rear Projection Television

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Jvc convergence im having convergence problems

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Greetings tyv22,

I would suggest using the following link to correct your convergence issues. http://www.fixya.com/support/p186391-jvc_av_48wp30_48_in_rear_projection/manual-17247/page-52

I hope this helps!
Dorothy
Go Ahead. Use Us.

Posted on Jun 25, 2008

1 Suggested Answer

easyab
  • 132 Answers

SOURCE: 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

Posted on Jul 07, 2008

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Its actually a easy repair but its recommended that the convergence resistors need replacement as well. You can get the parts at the following link and they provide free detailed instructions with pictures. You need two STK392-110 Convergence ICs and you would need the JVC convergence Resistor kit #1 also. Heres the link.
http://servicemanuals.vstore.ca/

Aug 29, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

IC's


Take the board out through the front inspection hole. No screws holding board. Middle large plug disconnects from chassis, not converge board. All other plugs come off converge board.

If the large plug is a problem, just hang out the front and solder.

Be careful with foil on board, crappy board.

Pacific Semi for ICs.

easyab

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1 Answer

I ART PRO JVC 56


You will need to replace the convergence iCs there are two of them they are both STK392-110 Ics you will also need the JVC convergence resistor kit. You can get the ICs and resistor kit at the following link and they provide free instalation instructions with pictures. Heres the link.
http://servicemanuals.vstore.ca/

Jul 26, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

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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

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Put the convergence controls at roughly center and manually adjust the green tube for the best pix. Then, go back and set up your electronic convergence and see what that does for you....accordianman

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Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.hdtvoice.com/voice/showthread.php?t=28929

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