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

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Board assembly or stk392-150

I have had the same problem occur today...red shadows and the red convergence will not move left or right to realign. I noticed your solution of replacing the convergence board assembly. Is this the same as replacing two stk392-150? Does this avoid the desoldering and resoldering? It sounds like the stk392-150 are about the same cost as the board. thanks

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  • Brentmitchel Jun 11, 2008

    Mines a little different, the blue is mialigned by 6 inches or so. Also the red and green is out but only by a little bit.

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That is correct. If you replace the entire assembly. No hand soldering is required, but you might still have to manually adjust the convervenge after replacing the assembly.
Let me know if you require further assistance.
Good Luck.

Posted on Apr 12, 2008

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I cant line the red and green crosses up left and right but i can move them up and down. I have two pics in diferent colors


The tv have a convergence problems,it is dead.Tv have colors lines like R,G,B mis alignments,have colors pictures shadows or 3D pictures look alike?Yes,than the tv convergence board it is dead.The tv convergence board must require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop will cost u like $300-350 for parts and labors.

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1 Answer

Currently, the red and blue color alignment is off and I am unable to adjust this. There is a red shadow with a blue hue. Have tried to realign the colors but can not get the red to move.


Ur tv have a convergence problems,it dead.The convergence board the 2 STK convergence ICS and some or all it resistors are dead.All these parts must be change to get ur convergence back to normal.The shop will u $300-350 for parts and labors.

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1 Answer

I have a rear projection Hitachi Utlravision HDTV. Today, it started showing pink and green shadowing on the left and center area of the monitor, which makes words and shapes look pretty blurry. Everything...


It sounds like a Convergence problem--go into the customer menu with the Hitachi remote and select convergence---look to see if one of the colors will not move---you can only move red or blue-----if something will not move you have a convergence problem.

Let me know here what you find and I can tell you what is involved if it is a convergence problem.

REGARDS, SD TECH

Sep 30, 2009 | Projection Televisions

1 Answer

Picture is distorted from center on my 65


You do have a failure in the convergence circuit of your set. If you are good at soldering you can replace the IC's yourself. They are on the large circuit board on the left side of the set looking from the back, and attached to a large aluminum heat sink. If you don't feel comfortable doing that, I reccomend removing the board and sending it to PTS corp in Indiana. They are pretty reasonable repairing boards, and a lot less than buying a new one.

May 31, 2009 | Sony Grand WEGA KDP-65WS550 65" Rear...

1 Answer

Picture is distorted from center on my 65" Sony projection TV.


hi. this will be an easy fix for you if you are a good solder. you will need to replace the convergence chip that is located on the PC board(main). this chip is damaged and it has failed due to this damage that has occurred. click below for your new convergence chip(stk).

CLICK HERE

May 21, 2009 | Sony Grand WEGA KDP-65WS550 65" Rear...

1 Answer

Unable to align red crosshairs in horizontal range


No there are no quick fix options for this fault. The convergence amplifiers operate similar to a high power audio amplifier, so if there is an impairment anywhere in the system, it will result in distorted audio, or in the case of television convergence amplifiers, one or more colors won't align. The convergence power pacs need to be replaced and the out of tolerance precision resistors located near the power pacs need to be carefully checked and replaced as necessary. And the power supply fuse links to the power pacs checked and replaced as needed.

It is also possible that there are root faults that cause the amplifiers to go bad which include bad connections or a bad digital control module. This repair is possible for anyone having basic electronics knowledge and soldering skills. After the above repairs are performed it may be necessary to perform the static convergence realignment procedure using the outer cross hairs as you mentioned, and realigning them.

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1 Answer

Blue is good but I couldn't adjust the red and the letters have laggig red behind them and the picture hvae red eyes and also red shadows


Right now I am troubleshooting the same problem. If you go into your picture menu on your tv go to manual red convergence and hit right. It should give you 3 sets of cross hairs and your red will be able to move up and down and from left to right. If yours is anything like mine your red will not move from left to right but will have no problem going up and down. If this is the case, chances are that there is a resistor blown on the board attached to your tube that controls the red (far left looking from the back). If you don't feel good about checking resistors and diodes on that board DO NOT start taking things apart. repair costs will only get bigger the more you take apart.

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1 Answer

Red shadows on images


http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

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1 Answer

Sony tv KP-61HS10 lenses wont align


This is common in those sets. One of your convergence IC's has stopped working and needs to be replaced. The convergence IC should be replaced and the convergence circuits realigned by someone with experience in Sony projection sets.

Aug 09, 2007 | Sony KP-61HS10 61" Rear Projection...

1 Answer

Blue and red shadows on screen


This sounds like one of the convergence IC's has cracked loose or burned out, and should be replaced and realigned by someone with experience.

Jun 26, 2007 | Hitachi 50UX57B 50" Rear Projection...

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