Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television

1 Answer

Jvc av-48wp74 48 in.rear

The color blue seems to wave in the middle of the screen and tried to adjust but nothing is working thank you

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 4,402 Answers
Re: jvc av-48wp74 48 in.rear


Posted on Jan 18, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Convergence problem with blue

This is a common problem. Its called a convergence failure.

Problem #1) Convergence


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...


Feb 18, 2010 | JVC AV-48WP74 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

Color blue will not adjust on crt color conergence adjustment , picture on tv is double with blue on right side, auto/manual mode , the color blue will not adjust on right or middle side from side to side,...

This is a 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-$300

Sep 27, 2009 | JVC AV-56WP74 56" Rear Projection...

2 Answers

JVC- red wave on screen and letters doubled

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projeciton sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
  • 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.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some photos of convergence problems.



Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Mar 12, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

JVC AV-56WP74 56 in. Rear projection blurred image

Check that the 3 output plugs are in the right sockets (Red, Blue, Green) There is usually a felt pen colored mark on a white tape on the plug in wires. The Board sockets are marked Red, Green, Blue.


Jun 20, 2008 | JVC AV-56WP74 56" 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...

4 Answers

JVC AV-48WP30 started displaying vertical lines every inch

it looks like theres a wave in the top of my screen on my jvc av-48wp30 not sure but i think it has something to do with the bulbs because the projection mirror wasfine and all wires seemed to be hooked up properly.. can you help? tell me where i can find the bulbs to replace them?

May 13, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Rear projection dark picture

Open up the front of the set and find the screen controls and perform a grey scal alighnment by adjusting the red , blue , and green screen controls but be carefull and make sure you adjust them evenly or the picture will not look right. Good Luck

Mar 23, 2007 | JVC AV-56WP30 56" Rear Projection...

Not finding what you are looking for?
JVC AV-48WP74 48" Rear Projection HDTV-Ready Television Logo

Related Topics:

51 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Projection Televisions Experts

easy alberta
easy alberta

Level 2 Expert

132 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

The Knight
The Knight

Level 3 Expert

66352 Answers

Are you a JVC Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides