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

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Convergence problem Our JVC iart big screen has a good picture until today. the blue ghosts the yellow to the right. Went to adjust & can not move the blue to the left. red moves well enough, but not enough to converge w/ blue. Whats up w/ that? any cure?

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  • Anonymous Nov 04, 2007

    I am having the exact same problem that just began this morning. Just a couple weeks apart from your own problem... can move my green and my red, but not my blue at the top of the screen. wonder if we have the same batch of blue lights

  • jay bud Nov 11, 2007

    the top of the screen has like a doble vision to it and I didthe convergens adjustment(sp). theirs is a super thinline acroo the whole tv and above that is wher the blured vision is.



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Sounds like convergence amps bad

Posted on Oct 23, 2007


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Cannot boost yellow on screen

A few suggestions here--first if possible look into the lens of the tubes with set on--is one brighter than the two others? A loss of blue to some degree would mean yellow (red and green).

Also ( you may have to remove entire grill from front below screen) with set off make sure all 3 of the circuit boards that plug onto the bottom of the necks for each tube are not loose or one has not slid down a bit.

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Picture is distorted from center on my 65" Sony projection TV.

hi. this will be an easy fix for you if you are a good solder. you will need to replace the convergence chip that is located on the PC board(main). this chip is damaged and it has failed due to this damage that has occurred. click below for your new convergence chip(stk).


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65 jvc iart model 65wp74 ,have a convergence problem,how do i get front panel off and where is circuit board located.Thanks

you need original jvc remote for this to work. Do not open anything until you. Go to menu on your remote find convergence and press the volume button to the right go to manual and press right again. you should see a bunch of rectangles, now you should also see a set of red cross heirs press the #2 to move cross heirs up and eight to move down numbers 4 and 6 will move left and right and 5 will place the cross heirs back to the center once you have chosen the selected section to adjust line up the magenta with the other colors using the channel and volume buttons these move the lines up down left to right adjust all lines until they are white. i do not know how to switch from magenta to green or blue but this should get you started on the right track with out having to replace anything. good luck! if you figure out how to switch from maqgent to green or blue please post it so that I may adjust mine as well tahnks

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2 Answers




50V500 ONLY
GHOST: May be described as "Out of Convergence" but ghost is still attached to main image.
A "ghost image" appearing to the left or right of images in the picture. Can be varying shades of a primary color (red, green, or blue) as well as gray. Can easily be seen in the 4 x 3 mode, at the edges of the picture.

To correct the problem, please do as follows:
  1. Access I2C Menu. (See page 57 of the Service Manual).
  1. To enter the I2C Service Menu, with power off, (on the front control panel) press and hold the INPUT button. Then press the POWER button for two seconds. The following Service Menu will appear.
03b_ghost_image01.gif Figure 1
  • Be sure to press SELECT after each change to SAVE the new Data.

  1. Using the Remote Control joy stick, scroll down to next page (see Figure 2) until LCD ADJUST is highlighted.
03b_ghost_image02.gif Figure 2
  1. Move the joy stick to the right to cursor right once. The next page will appear with the word GHOST highlighted.
  2. Cursor right again, and a white screen will appear with a BLACK SQUARE in the center, as in Figure 3. You will see LCD ADJUST, followed by “SHP” and a number (value).
Figure 3

  1. If the unit is out of adjustment, you will see a gray ghost on either side of the black square. Move the joystick to the right or to the left until the ghost disappears. The number values will change up or down.
    • If the ghost adjustment is off with a lower value, there will be a ghost to the left of the square.
    • If the ghost adjustment is off with a higher value, there will be a ghost to the right of the square.
  2. Once you get the square to look good without ghosts, press "SELECT" to save any data values that have been changed.
  3. Press the "EXIT" button three times to return to normal picture.
  4. Adjustment is completed

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2 Answers

JVC 56TH INC. IArt Rear Projection

If the red is colored outlines or 3d picture then it is a convergence problem.

If convergence is ok, then most likely screen/focus control assembly.


Apr 21, 2008 | JVC AV-56WP74 56" Rear Projection...

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