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

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JVC TV TROUBLE

THE PROUBLEM IS MY TV JUST STARTED WORKING BAD ALL OF A SUDEN. THE PICTURE HAS WAVES TOWARD THE TOP OF THE SCREEN. THAY ARE GREEN. AND THE PICTURE IS DOUBLE, AND BLURY.I TRYED ADJUSTEN THE CONVERENCE BUT IT GOT WORSE. CAN YOU TELL ME WHAT I NEED TO REPAIR THE PROUBLEM. AND THE PART DISCRIPTION AND NUMBER. THANK YOU

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  • rwp1 Apr 27, 2008

    we are currently having the same problem with our 65 in Rear Projection HDTV-Ready television. Same exact problem

  • liber8d Apr 30, 2008

    I am having the same problem. All of the sudden, the top of the picture was a bit curved and the colors look like they are separated. In the center it is fine. If I squint it's even better.

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  • Master
  • 2,267 Answers

If you guys 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.
The link provided is for parts for the AV-56WP74 model ONLY. For the 65 inches; you should contact the vendor and provide the correct model number.
Good Luck.

Posted on May 24, 2008

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You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

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1024x768 Normal 0 Convergence


When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

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The convergence ICs need to be replaced. I can post a link where to get replacement ICs along with free step by step instructions so you can do the repair yourself. Its an easy ,common repair , however a shop will be around 300 to 400

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You may have a convergence problem that means, there may be convergence ic's bad or related components.
If you know something about tv's, try checking things out.
You can get a repair manual from websites to download.
If you do not normally fix tv's the best thing is to call a tv repair technician.

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