Question about JVC AV-48WP30 48" Rear Projection Television

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Convergence I'm unable to make any convergence adjustments.  I no longer have the manual so I was happy to find one here; however, on page 50 that has the instructions, the graphic showing which keys to use to make the verticle/horizontal adjustments is missing. Can you help me figure this out?  Thanks.

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Re: Convergence

If a convergence issue exists, alignment is secondary to the did not indicate if you already repaired problem
and are now doing final re-alignment.....T.
Usually, two STK IC's are replaced............................

Posted on Dec 26, 2007

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I am unable to adjust the red color in the convergence adjustment on my IQC50H94W 2000 Zenith 50". From everything I read I believe I need to replace my Convergence IC Chips, however I am not 100%...

Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from and do the repair yourself. Its a fairly easy DIY fix.

Jul 24, 2011 | Zenith IQC50H94W 50" Rear Projection...

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Unable to align cross hairs on the blue lense. Dose the lense need to be replaced?

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
•Screen looks 3D
•Colors don't line up
•One or more colors can't be adjusted when using the convergence menu.
•Screen is bowed or warped.
•TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some photos of convergence problems




You can see some more examples and find a fix using this link on Fixya - CLICK HERE

May 08, 2010 | Hitachi 50UX57B 50" Rear Projection...

2 Answers

Cannot get the set to focus. Colors are blured

Sounds like a convergence misalignment, go into the tv menu and look for other adjustments sub menu and follow the on screen directions,this is a simple procedure but will take a little time to get it adjusted just right. Directions are also on pages 20 and 21 in your owners manual. Good luck!

Nov 26, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Toshiba 50" Convergance

One of the amplifiers in the convergence area is defective. has to be replaced. shouldn't be an expensive repair. adjustment is needed after this replacement.

Apr 14, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

Convergence Issue on Toshiba TN50X81 - Service Manual & Parts Source?

Replace the convergence IC's - P/N STK192-110 with part STK192-150 or 180. Then you can go back in and make the detailed convergence settings and get your picture back in alignement. Also check the flame-resistant resistors around the ICs to make sure that none of them have opened up.

Jan 11, 2009 | Toshiba TN50X81 50" Rear Projection...

3 Answers

Hitachi 50" 50GX30B PJTV

Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in but stationary.
Here is a quick test....
Using your original remote go-to the tv settings then goto the convergence or magic focus 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.
You can get a repair kit that includes all the parts from
They have put together a kit for the Hitachi TV sets.
The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself. Its a fairly easy fix on the Hitachi sets.

Oct 20, 2007 | Hitachi 50UX57B 50" Rear Projection...

2 Answers

Convergence Problems

If you did not use heat sink compound then you probably have not hurt the new IC's yet but you should remove them and add the heat sink compound NOW. If the convergence IC's are bad then you will have access to the convergence menu but the adjustments will have no effect. The fact that you switched the IC's and got the same results shows that the IC's are good. If your red convergence is still way out when the new IC's are installed then the old IC probably burned out the low value resistor associated with the Red Vertical (RV) channel.

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1 Answer

Toshiba 55H70 convergence problem fixed but now gone

I just posted a question about a convergence problem( juice07 ). I am unable to adjust the red color in the convergence adjustment mode. Did you have a similar problem ?? Please help.

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1 Answer

Rca 52' projection convergence problem

Its a good possibility that your convergence problem could for now be cold solder connections on the driver ICs on the convergence board. The longer you use it the more of a problem its going to surge those ICs till they go bad and maybe cause other componet falure as well. If your not a technician i would have this set serviced asap before it becomes a major repair Good Luck

May 22, 2006 | RCA P52926 52" Rear Projection Television

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