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

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I have a jvc av-56wp74 rear projection tv. when i turn it on sometimes the picture is staticy. other times it's grey with black lines. other times its purple with red lines, ect. sometimes if i turn it on and leave it on for a few minutes and turn it off and on it comes back. i've looked inside and nothing looks burnt but i have no idea where to start looking to find the problem

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Look inside again,and pull the circuit board or boards out enough to look under them.You are looking for a cold solder joint,on the leg of a heat sink.The factory does not always solder with there robots real well.Clean with contact cleaner,and resolder.I hope this was helpful,if so,please let us know.

Posted on Oct 09, 2009

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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.

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It is worth getting an estimate. From the symptom you explained, it looks like the horizontal output transistor became defective.

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I have a JVC AV-56WP74 Rear Projection HDTV Ready Television...I had a problem with the convergence with dual pictures on screen...I replaced the convergence card with 110's.....This fixed the screen...


The STK392-110 are the stock ICs for your JVC. Chances are one or more of the feed resistors are bad. JVC TVs will usually have at least one bad resistor when the original ICs fail

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

1 Answer

HOW DOES THE FLYBACK AND FUSE LOOK ON THE AV-56WP74


Hi

the flyback is a high voltage step up transformer that light up the CRT tube. usually this is color black or sometimes Grey with have anode wire attach in the picture tube. the fuse are so many types of fuse,. but in this model the fuse is like crystalin glass tube with metal at both ends..

Thanks!

Jul 08, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Blue lines


Hi, convergence amps have failed, your going to need a tech for that repair, involves un--soldering and re-installing parts as well as an alignment, hope this helps, video-tek

Feb 11, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

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you could have a shorted tube Green disconnect CRT board from green tube if set stays on tube is shorted also check video ic on crt board.

Dec 07, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

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id probably get a new model once they are past the 5 year mark its about time for a new one

Jul 22, 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

Tv comes on then goes black power light blinks on and off modle # JVC AV-56WP74 56


Check the coils on the main board. Coils mean round ferrite donuts (1 inch or less) with copper wires on it. I have seen this come out.
if not check convergence amp ic's
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Dec 20, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

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You need to replace the convergence IC's. That is the most common issue with any CRT type projection TV.

Apr 06, 2007 | JVC AV-56WP74 56" Rear Projection...

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