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

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JVC AV 56WP74 Problem after fix

Hello, You helped me with an earlier problem. I had red wavy lines and you suggested to change the convergence modules. I did and it took care of the red wavy lines. Thanks a million. I did check the resistors and they all seem to check out ok with my multimeter, (ohms). Now that it is all back together the red, green, and blue are not lined up at all. The auto-conv. doesn't help and niether does the manual convergence. What can I do to adjust the colors? Thank you again for your previous help and thank you ahead for any help you can lend. -Eric

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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

Posted on Apr 01, 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...

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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

Convergence problem


Hello,

Did you lock the adjustment into the TV's memory? This step is the most often missed. Please follow the directions on the Users manual or on the service manual on how to set your memory to hold the configuration.

Find the menu item on setting the convergence adjustment into memory (the menu should have an informational screen on this topic)

I hope this helps

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Mar 06, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

JVC I'Art AV-56wp74


A repair facility will charge 400 to 600.00 for the repair. Or you can repair it yourself if you can solder. As both convergence ICs need to be replaced. They are STK392-110 you can get replacement ICs at the following link with free instalation instructions with pictures so you can do the repair yourself. Heres the link.
http://servicemanuals.vstore.ca/

Jun 15, 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

Red Wavy lines running across the screen...


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

Mar 24, 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...

1 Answer

JVC AV-56WP74 56 in


You don't have to replace the board, just the amps. This set uses two stk392-110 Sanyo built amps. You will also need to test and possibly replace one or more of the 1.5 ohm feed resistors in that circuit.
If you're doing this at component level try Acme in Florida for amps and resistors: 1-800-575-9833 http://www.acme-sales.net/index.shtml and if you're doing this at modular level send it to PTS http://www.ptscorp.com/ 1-800-844-7871
Good luck!
Bill

Nov 27, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Jvc av56wp74 blue shadow


my suggestion would be...to replace the focus block..john

Aug 10, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Double vision On JVC AV-56WP74 56


You have an convergence problem, There are 2 IC's that go bad and a few resisters that can change value. If you flip the board with the Chips inspect the pins for cold solder joints. The IC's can be purchased from matelectronics

Jun 17, 2007 | JVC AV-56WP74 56" Rear Projection...

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