Question about JVC AV-56WP30 56" Rear Projection Television

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Convergence problem? upper left quadrant of the screen convergence is off - unable to correct using controls per users doc pg 52

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  • jimpedersen Aug 01, 2008

    Slinteriors - Thx for the reply and potential fix - will implement and hopefully rate this at 4 diamonds FixYa!

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  • JVC Master
  • 8,617 Answers

You will need to change the two convergence ICs they are both STK392-110 and you may also need the convergence resistor kit for your model. You can get replacement ICs and resistor kit at the following link and they provide free instalation instructions with pictures.
http://servicemanuals.vstore.ca/

Posted on Aug 01, 2008

  • Sonny Berry
    Sonny Berry Aug 01, 2008

    youre welcome. If you use the service I linked to you,ll be fine as they go the distance with free support to insure a successful repair

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I have a Sony KDP-57WS550 TV that has a convergence problem. Based on the symptoms, I'm not sure whether to indict the convergence ICs. In the convergence mode, I can move the red (and blue) crosses,...


With your TV in setup Use a small magnet to "move" the non converged Red, Blue, or, Green color lines "crosses" (each CRT will need to be adjusted in turn) by moving the magnet close to the offending Red, Blue or,Green color CRT yoke or, tube while observing the movement of the CRT color line "cross" in a mirror ( try several places near the tube and, several strengths of magnets:) a refrigerator sheet magnet works well (you can cut these with a scissors to make a better fit or, apply less magnetic "pull." by making them smaller (you may need more than one magnet per tube to fix each CRT's convergence) When you have each CRT tube's convergence right, apply some clear silicone adhesive to the magnet and, permanently affix the magnet to the now "fixed" CRT tube exactly where you placed the magnet to obtain the best convergence on the CRT.
(Do not adjust the "Green" CRT unless you must, as it is used as the color line to adjust other lines to)

Jun 30, 2011 | Sony Grand WEGA KDP-57WS550 57" Rear...

2 Answers

I have a convergence problem in the bottom of the lower left quadrant pf the screen. It is like a parabolic semi circle that is at the very bottom edge of the screen. The front screen isn't damaged at...


Tv 100% have a convergence problems,if any parts of the tv picture colors lines R,G,B are mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergence board the 2 STK ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced to solved the tv pictures convergence problems.The shop,will cost u like $300-350 for parts and labors.

Nov 23, 2010 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Conversion-----the red lines are distorted so badly they won't move at all. I've managed to line the other lines up. The top left quadrant has drooped so badly that they will not adjust back. The bottom...


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.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

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 - TV may also make a chirping noise.
Here are some photos of convergence problems.

49abec3.jpg
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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.

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 solution

93a1209.pngCONVERGENCE SOLUTION

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 know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

Feb 11, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Multi-point convergence -- Lower left quadrant of screen distorted. Red ok. Blue arched up and then done to normal in Lower right quadrant; left-right adj moves vertical gridline but is s-shaped. Blue...


Look in users manual or internet you should find how to access service mode, this is different from regular setup CONVERGENCE, this involves getting into changing parameters to tweek convergence, even after amps are changed. These projection tv's are known for loosing convergence if bumped, moved and amps go bad in time.

Jan 03, 2010 | Pioneer PRO-520HD 53" Rear Projection...

2 Answers

Hitachi 61UWX10BA Convergence Still Off After Chip Replacement


Remove Front bottom Panel thier you will see front of convergence board there is a small blue contact switich with TV on press and hold it for 5 sec then you should see convergence Pattern so you can aline convergence correctly I have the whole Manual to tv just have to find it. anyway for now try this.

Dec 01, 2009 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

My big screen panasonic tv has a double fuzzy picture what am I supposse to doto fix it


Adjust the convergence or reset it to factory default. Use only the remote when adjusting convergence. The front controls have no effect.
  1. Press action button to enter MENU.
  2. Navigate to SETUP.
  3. Scroll down to CONVERGE.
  4. Press VOL > to select.
  5. Press CH buttons to navigate up or down.
  6. Choose CONVERGENCE ADJ or RESET TO DEFAULT.
  7. Press VOL > to select.
  8. If CONVERGENCE ADJ is selected the align Green to Center screen will be displayed.
  9. Use the navigation buttons on the remote control to align the horizontal and vertical green lines on screen, with the cabinet reference marks on top center and left
    center of cabinet.
  10. Press ACTION button to display red center correction screen.
  11. Use the navigation buttons on the remote control to align the red cross with the white cross pattern at the center of the screen. To prevent picture tube damage do not leave test pattern on for an extended period of time.
  12. Press “0” on the remote control keypad to display the BLUE center correction screen, repeat procedure for adjusting blue. If needed press “0” again to return to RED correction screen. An adjusted cross pattern appears white with a minimum of color protrusion.
NINE POINT CONVERGENCE CORRECTION
Remote Control must be in TV mode.
  1. Press ACTION button to display red correction screen.
  2. Press the 1 through 9 keypad buttons on the remote control to select the desired convergence position.
  3. Use the navigation buttons to align the RED cross with the white cross pattern.
  4. Press “0” on the remote control keypad to display the BLUE correction screen, then repeat procedure.
  5. To exit press ACTION button repeatedly, then press CH up.


Nov 07, 2009 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Problem with red on one side


all you have to get to the convergence area to adjust that quadrant thats bad

Feb 01, 2008 | Hitachi UltraVision CineForm 55VG825 55"...

2 Answers

Convergence Problems


If you did not use heat sink compound then you probably have not hurt the new IC's yet but you should remove them and add the heat sink compound NOW. If the convergence IC's are bad then you will have access to the convergence menu but the adjustments will have no effect. The fact that you switched the IC's and got the same results shows that the IC's are good. If your red convergence is still way out when the new IC's are installed then the old IC probably burned out the low value resistor associated with the Red Vertical (RV) channel.

Jul 02, 2007 | JVC AV-48WP30 48" Rear Projection...

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