Question about Hitachi 50UX57B 50" Rear Projection Television

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Model 51S715: 2 issues: (1) Screen is bowed at top...left and right edges turn down and are black. (2) picture color will turn green randomly. If I turn tv off and leave off for a while the color goes back to normal.

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  • Hitachi Master
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Ur tv have a problem call convergence,it dying about to be dead.The tv convergence board 2 STK Convergence ICS and some or all it resistors require changing to solved the covergence problems.U have tools,soldering iron,solders and know how to do soldering?Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

Posted on May 29, 2010

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My Model TV # is 51swx20B. Two days ago the picture started having a lot of green in it and no blue. What is the repair needed.


Do adjustments on focus block. Will have to open front panel access door, focus block blue will be on left, green will be on top. Top screen bottom focus. Turn clockwise to increase, counter clockwise to decrease brightness. Turn the color all the way down on menu where it's pure black and white and make adjustments for perfect black and white picture, then when you adjust color, it will be perfect.

Aug 09, 2011 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

We have a Hitachi 53udx10b tv. Recently it was


Projection sets have two very common problems.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 05, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

BAD PICTURE, DISTORED, MOSTLY ON THE EDGES, BUT THE BLACK LINE ON TOP IN HIGH DEF CHANNELS IS NOT STRIGHT ACROSS, IT BOUGHS DOWN LIKE A "U" SHAPE


Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( 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.
701cb04.jpg
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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.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, 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.

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TV set after fluid change

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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.

Apr 15, 2009 | Sony KP-51WS520 51" 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...

1 Answer

Picture is bowed down from top left corner to top right corner and bowed up from bottom left corner to botton right corner. Colors are seperated a little in corners and middle top and middle bottom.


Convergence ICs are faulty what is your model number? I can post which ICs you need and where you can get replacements that come with free instalation instructions so you can do the repair yourself

May 07, 2008 | Televison & Video

1 Answer

Convergence issue with blue


You need to replace the convergence Ics located up front behind the speaker grille numbers STK392-110 you can get replacements at the following link and they provide free tech support and instalation instructions with pictures. heres the link.
http://servicemanuals.vstore.ca/

May 06, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

TV Turning on and off, left side of picture is not lining up, bowed in center


Most likely you had a power surge issue that caused the tubes in your crt projection to malfunction. I would recommend having a service call done to find out the issue

Apr 22, 2008 | RCA P61960 61" Rear Projection Television

1 Answer

Color problem green and pink


I had a very similar problem - the picture would get garbled, the black colour would turn into dark or bright blue tones, and i would get wiggly/jaggy outlines on the picture wherever contrasting coulours' edges met. After 2 service calls (replaced video boards both times), i gave up and popped the back cover on the TV. I wiggled a cable that connects the video board (it is on the top left quarter of the TV if you are looking straight at the front of it), and noticed that the picture improved right away.

I found that there is a bad solder on the cable connector, and simply keep the cover off now, as the connection will get flaky once in a while (especially in warmer temperatures).

Dec 05, 2007 | Televison & Video

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