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

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Red Wavy lines running across the screen...

I have a JVC AV-56WP74 that worked fine last night with no problems what-so-ever. This morning when we turned on the television there were hundreds of red wavy lines. I have never had a problem with the colors mixing or shadows. Does anyone have a solution?

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  • Eric Johansen Mar 25, 2008

    Thank you for helping, I will try that.

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  • 934 Answers

Yes - - that indicates one of your convergence amps have failed. That unit takes two STK392-110 Sanyo amps which I personally would replace with STK392-150's for greater reliability. Also check all of the return resistors in that circuit 1.5 ohm 2w and feed resistors 3.3 ohm 1w all are flameproof. You'll likely find that one or more of the return resistors are bad, with suspecting the red is the failed amp check in particular R846 for change in value or open.
Bill

Posted on Mar 24, 2008

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JVC AV-56WP74 56 in. Rear Projection red projector is not showing images and big red line in tv


If the red line looks like a swoosh of red across the screen it may be the convergence Ic having an issue.

Jul 04, 2011 | JVC AV-56WP74 56" Rear Projection...

1 Answer

My tv is a jvc av-56wp74 it looks like 3Dwithout the glasses the colors dont line up


The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the 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,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix herebb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 04, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

On our JVC AV-48WP30 48in, red shadows


some how the convergence ckt went bad,common problem to pj televisions.

Mar 19, 2010 | JVC AV-48WP30 48" Rear Projection...

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Jvc 56in. rear projection. wavy lines, double visioned


you need to change converance chips do both STK392-120 you can also use 150

Apr 25, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC 56 inch projection AV-56WP74 red color not aligned


I have the same tv set and about 4months ago Ihad the IC STK392-110 replaced. I was told that it was the most common problem with proj. tvs. It did solve the probem until last night when I went into the menu to change a audio setting and stupiditely accesed the convergence setting and decided to do an auto adjustment which mesed up my beutiful HD picture. Now I have the red out of alignment ad even after I did a reset and multiple manual adjustmets it is still off at the top and bottom af my screen.

Dec 27, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Red red wavy lines across the TV screen


I did not fix the problem, but you have the model number wrong, it is KP-46WT510

I do need some help.

Nov 23, 2008 | Sony KP-43HT20 43" Rear Projection...

1 Answer

JVC AV-56WP74


there are two i.c chiyou have to replace they have to do with the conversion go to electronix.com you can both for 5 a piece plus 5 for shipping and handling so 20 dollars total you have to replace both of them

Oct 13, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC AV-56WP74 Please help wavy 3d


If you do not have hand soldering skills or know how to use a multimeter, I would suggest to replace the whole assembly.
If you know how to solder you can just replace 2 ICs that are mounted on the big black heatsinks and possibly 1 or more resistors.
Click here to find the entire assembly for your TV.
Good Luck.

May 02, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC AV 56WP74 Problem after fix


Will the colors move into alignment controlling them manually?
If you can get the colors to align but they simply won't hold it's a matter of programming. If they won't align you still have a failure in the convergence circuit. If red or blue will only move so far but not close enough to align you have an amp problem.
Bill

Mar 31, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Jvc av56wp74 rear projection tv


http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 18, 2008 | JVC AV-56WP74 56" Rear Projection...

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