Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television

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Convergence Board (I hope)

At first the TV was unable to adjust the red color horizontally on the convergence screen, so read up and replaced the STK chips. Then when I replaced the board with the new chips in, the TV would try to turn on and the speakers would start popping rhythmically and then stop, with no screen on but the blue power light would flash on and off until I would unplug the set. I then removed the convergence board and turned the tv on...it worked, but of course the screen colors were completely off. I then put the convergence board back in, but once again the TV did as desribed earlier. Started playing around with the wires and found that if I unplugged the connector that goes from the convergence board to the board that holds the power stuff (I think - the one in the back opposite the side of the inputs), the tv would turn on like it did if I didn't have the convergence board in. My question is basically if I get a new convergence board, will it solve the problem (or atleast a good probability that it might)? Or, what could be better is if I could get a hint as to where to look on the convergence board so I wouldn't have to spend the money to get a new board.

Thanks!

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  • ban111 Feb 08, 2009

    I have a Philips 60" back projection tv and I can align the blue and I can align the red verticlly but not horizontally. Is there a quick fix or do I need to replace the convergence board?

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Check this out I have the same problem check your solder spot make sure the solder points are not touching one another, that could be one of the reason is doing this or just to make sure you can desolder the stk chips clean the holes where the pins go trough the board and power the tv with board and if the tv start fine if could be bad stk chips be very careful when desoldering or soldering good luck about another is not worth it they cost too much around 350-450

Posted on Feb 09, 2009

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Common Problem #1) Convergence has gone out

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Common Symptoms include....


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7859b01.jpg

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Picture of a set that needs the fluid changed.

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TV set after fluid change

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You can get the correct parts, step by step photo instruction guides, and support from www.TvRepairKits.com or click here

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Here are some of the most common symptoms and example photos of a convergence problem


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Here are some photos of convergence problems.

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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


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Pool board out.
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Set new STK with thermopasta on board in to hallsradiator. Screw up.
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Set up board back...5515c27.gif

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