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

2 Answers

Green Tube Convergence Issue

My AV-48WP30 TV has been giving troubles for the longest time. The green convergence is way out of sync with the other 2 picture guns (hence the green color is distorted). I know there are ways to correct it but can't seem to find the correct link/directions. I got it fixed last year for a ridiculous $400 and the problem has since returned. Any suggestions or directions would be greatly appreciated! Thanks in advance.

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  • abflex Jun 25, 2008

    Hi Dorothy,

    Thanks for the quick response. The problem I have isn't fixed with the instructions you sent. I'm pretty sure it's a little more complicated than that, something more on the lines of hardware malfunction with the green gun. I know there are tips on how to correct them where replacing the chips are the key with a little bit of soldering, but can't seem to locate them anywhere. Thanks again!


  • abflex Jun 25, 2008

    This link below ideally describes my current issue with the TV:

    http://calgaryconvergencerepair.weebly.c...

  • welder73 Dec 11, 2008

    i have a problem, and tried to fix it myself by adjusting the guns, color tubes. the green is the only one that is out. the red and blue will come into correct checker like lines on the adjustment, but green will not come in, off to the left, and top and bottom is like bannana shaped. any help would be appreciated. its driving me crazy that I cannot fix this myself.

  • jdbaker10 Dec 29, 2008

    can line up red and blue convergence but green on top and botton is in a banana shape toward the middle of the screen.

  • bushney Jan 02, 2009

    Dorothy, I have the same problem w/the same tv, only mine is the 56-inch version: JVC Projection Television, Model # AV-56WP30. I've tried this based on the manual and it still won't work. Any suggestions of what I can do to try and fix it myself? I don't have $400 to pay a repair-person.

    Thanks.

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They should FIRST replace the convergence IC's, the convergence does not go out a large amount for no reason. these adjustments are only when the convergence drifts out of alignment a small amount. trying to make these adjustments without first replacing the convergence iC's will result in a very had time to adjust the convergence once the original problem is corrected. Shame on you to recommend adjust before a repair.

Posted on Jun 25, 2008

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Greetings abflex,

You definately came to the right place! Here is a link right here on FixYa with the directions on how to correct this problem.

http://www.fixya.com/support/p186391-jvc_av_48wp30_48_in_rear_projection/manual-17247/page-52

I hope this helps!

Thank you,

Dorothy
Go Ahead. Use Us.

Posted on Jun 25, 2008

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My JVC projection television AV-48WP30 has green and red streaks at the top with one long blue streak going across the screen. I tried everything that I could to fix it by the tv and remote and it still...


Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
701cb04.jpg
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

Dec 22, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Jvc av-48wp30 blue to align convergence


Tv colors R,G,B don't alignment any colors.Tv have a convergence problems,it dead.Tv convergence board require changes 2 STK convergence ICS and some or all it resitors to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Jul 11, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

JVC AV48WP30 Projection TV..Half picture distorted and flickering


Ur convergence is dead.Must replaced the 2 convergence ICS and all it resistors.The shop will cost U $300 for parts and parts.

Feb 10, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Have a JVC AV-48WP30 rear projection tv set and the green seems to be out of place. the green image is lower than the others and is in a wave shape on top of screen and bottom.When I adjust the convergence...


Your convergence IC's are bad. If your not doing the work it will probably cost in the neighbor hood of $250.00 for a service company to do. Not a major repair.

Nov 03, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Red and green vertical lines through television. tried to line up crosses in convergence option under menu with no luck.


Ur convergence is dead,buy the convergence kit,use what in that kit.U know how to solder right?Tries these Websites Tv Repair World.com or Ebay.com.

Sep 30, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Red and green shadows


Your tv has a convergence board problem. Have a technician replace the convergence IC's.

Jul 08, 2008 | JVC AV-48WP30 48" Rear Projection...

6 Answers

Suddenly, the screen shows double images on letters and numbers plus red/greenish like shadows on characters.


Youre convergence Ics need to be replaced. post the model number of your set and I will post the STK number that you need and a link where you can get new replacement ICs

May 25, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Av-48wp30


check for loose connections on convergence amp ic and crt boards
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

Jan 27, 2008 | JVC AV-48WP30 48" Rear Projection...

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