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

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Curved red lines across screen

I have a JVC AV-56WP74 rear projection TV. Tonight all of a sudden thin, curved red lines came across the entire screen. I noticed from postings that this is probably a convergence problem. I chose Autoconvergence from the menu but still no luck. I am completely illiterate when it comes to TV repair. Is this something that I could try to accomplish myself (with hopefully some step-by-step instructions) or will I need to pony up for a technician? I'd appreciate any help you can give. Thanks!

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Hi there, i had the exact same problem as you and this is how we solved it. Instead of replacing the convergence IC's as suggested above, which requires soldering and de-soldering, which could damage your board (this happeend to us). Order online part # SSB-5068A. This is the ENTIRE convergence board with new IC's. Cost you about $140 (from vance baldwin.com) but is a lot less hassle than you trying to soldering/desoldering parts. Only thing is, next to the 2 large heat sinks, there is this large silver component that you need to unscrew from your old board, and unplug and attach to your new board. We tok the new board..hooked up all the wires..and voila, no more convergence issues.

Posted on Jul 13, 2007

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We have the same problem. As suggested by yangfan we ordered a new board but the tvdoctor (Allan Wainright allexperts.com) says that the new board will have a different dcu and in most cases the memory will be very different and take major programming to work right. What was your experience with this dcu? Is it the big silver thing next to the heat sinks? Can the dcu from the old board be swapped to the new board? I'm not sure what "major programming" means - like does it require special equipment? Thanks for your time.

Posted on Jul 28, 2007

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It sounds like one of your convergence IC's has burned out. The IC needs to be replaced and the convergence realigned, and since you admit being completely illiterate when it comes to TV repair, I suggest that you allow a qualified tech to handle it for you.

Posted on Jul 09, 2007

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Posted on Jan 02, 2017

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1 Answer

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.

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Ur convergence it dead,U know how to solders?Buy a convergence kit,use what in that kit,ur tv should be back to normal.Try this website.Tv repair World.com for the convergence kit.

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sounds like a solder related issue on the convergence ICs. They are acessed through the front of the TV behind the speaker grille and then remove the small acess panel and you will see the convergence amp board with the two ICs on it.

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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

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Is there a cheaper solution? $600 sounds like you just throw it away to me...

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1 Answer

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Are the red lines running on a slight angle razor thin with a slight curve to them? Respond to this same post and I will be able to help you repair the set.

Jul 01, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

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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/

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Are the lines real thin on a slight curved angle when they appear? If so it is probably related to the either the CRT PC boards or the Circuits for the convergence yokes attached to the neck of the tubes as they are all connected in series to each other. let me know if you need further assistance and or parts.

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You have a convergence problem. Components are shorted out and must be replaced. Unless you're a technician, there's really nothing you can do at this point.

C-Dog

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1 Answer

Green shadows and curved picture


the convergence apms ic"s need to be replaced

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