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

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Ive replaced the entire convergence board and now...

I replaced the entire convergence board and now after about 10 minutes the screen goes into complete green waves any ideas on what this is or how to fix this problem? please help

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  • JVC Master
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Check the connections on the small OSD board where the convergence board wire clip plugs into it that small board may not be seated properly.

Posted on Jun 06, 2008

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1 Answer

Lcd tv screen goes out after 10 minutes


Check for any loose solder terminals at it main power regulator board.

Apr 09, 2015 | Televison & Video

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Picture flickers for 5-10 minutes then goes black


in the back of the t.v. there is a mother board. on the mother board ( im not sure what it is called so i will describe it)
it looks like a black tune. it has a red wire comeing out of he top going to the front of the t.v. connecting to the picture tubes. now see what happens is that tube will heat up and sometimes loose connection. what i found to be helpful is to stick a peice of cardnpard under it so it gets a good connection again. but do becarful because it is high voltage....... so if you decide to try to work on the t.v. please unplug it first.

Aug 07, 2008 | Mitsubishi VS-50111 50" Rear Projection...

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What could be the problem with my set. 40in flat model f4ov87c .


Look at the T-con board. It controls the picture, not the main board.

Sep 23, 2014 | Hisense Televison & Video

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I cannot get the blue convergence cross to line up with others.


The tv convergence board is dead.Any colors G,B,R don't alignment matches up.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts must be replaced to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Jul 17, 2010 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

My 10 year old tv goes off after about 5 minutes and the blue


Any colors mis alignments R,G,B.The tv have a problems known as convergence problems,it dead.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts,must be replaced in the tv convergence board to solved the convergence problems.The shop will cost u $300-350 for parts and labors.

Jul 17, 2010 | Panasonic PT-56WXF95 56" Rear Projection...

1 Answer

Screenplay 5700one horizontal line across entire screen, comes on


this could be the main board or the dmd board on the light engine. you can try disconnecting, cleaning the connections with an approved board cleaner, blow the connections completely dry and then reseat the connections firmly. This has worked many times for me. If the problem still persists you will have to have the projector tested to find out what needs to be replaced.

Jun 16, 2010 | InFocus ScreenPlay 5700 Multimedia...

1 Answer

Screen is arching at bottom of screen. only does when you first turn it on after 10 0r 15 minutes it fixes itself


This is the begining of a convergence problem and the O/p IC' will probably need replacing.
Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

Convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 06, 2009 | Mitsubishi WS-65819 TV

2 Answers

Color alginment is off


Your TV most likely has one of two possible problems.

Problem #1 - Failure in the convergence circuits. ( common problem )

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


  • 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.
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.

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

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.

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TV set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

May 20, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

CONVERGENCE ISSUE *UPDATED* RCA HD52W63D


Convergence Power supply board. In the television above the cuircit boards there are two curcit boards that sort of hang above. the one on the right is the convergence amplifer board(has metal fin like heat sinks).. The one on the left is the convergence power board. Since you have options and no control, bowing picture. this would be my first choice. Now it still may have convergence amplier trouble. To get these boards you will have to get the entire model with suffix ext. it will be like d52w20...yx1 yx2 or something like that. in small leter on the model sticker on back
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Dec 06, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

7 Answers

HC-P4752W - IC Replacement vs Convergence Module.


The colors weren't lining up correctly on my HC-P4752W which is only about 30 months old. I did a little bit of research and got ahold of the people at http://servicemanuals.vstore.ca/ They recommended replacing the IC's as well as the IC resistors. I purchased the replacement parts from their site and made the repairs myself. I should mention that I didn't have any previous soldering experience. The repair was easy and a complete success. You may find replacement parts elsewhere for slightly cheaper but what you won't find is the prompt and detailed customer service that they provide. They gave me there # and said to call if I had any questions before or during repair. I took advantage of their services and got answers every time I called.

Aug 11, 2007 | Samsung HC-P4752W 47" Rear Projection...

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