Question about Hitachi 50GX30B 50". Rear Projection Television

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Blue convergence is bowed

I did the manual convergence and the blue one is bowed at the top to the point where the center one is a few inches below the others and it won't go up any higher, and the bottom left corner is sideways, is there a way i can fix it myself or do i have to get it repaired?

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  • 668 Answers

The Convergence circuit probably has failed and unless you are familiar with the circuitry I
would suggest getting a professional repair facility. If you are, replace the convergence IC's and also look for any open resistors for the Blue Sub-Yoke
Hope this helps,
Skyassoc

Posted on Jun 30, 2009

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1 Answer

Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 06, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Bowing of picture at top and bottom towards center.


Projection sets have two very common problems outlined below.

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. The TV can also shut down when the convergence starts to fail.

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, RCA and others.


You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

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.pngSOLUTION

You 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

Jul 12, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Wont autofocus, bow in blue color at top, cant adjust blue convergence


hello it's the convergance chips my be the problem get a quote from an engineer its a big job 2 do yourself trust me i've repaired a few my self i hope you get it fixed good luck

shaun

May 21, 2009 | Samsung Televison & Video

1 Answer

Sony kp46wt510 red only convergence bowed on top and bottom


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 projeciton 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.

42d3683.jpg

7859b01.jpg

e87380c.jpg
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Nov 19, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

1991 hitachi 60sx1k rear projection, lines are bowed at top and botom


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 projeciton 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.

42d3683.jpg

7859b01.jpg

e87380c.jpg
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Oct 23, 2008 | Hitachi 50DX20B 50" Rear Projection...

2 Answers

60" TV has an arc in the pic


Check the fuses 1007 & 1405. If they are blown in will cause an Arc.  

Note: If the screen shrinks/expands you may need a chip kit from www.repairkits.com


Aug 28, 2008 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Red bow on top and bottom of 61dx01b


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 projeciton 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.

42d3683.jpg

7859b01.jpg

e87380c.jpg
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

May 21, 2008 | Samsung PCL5415RB 54" Rear Projection...

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

Red convergence is bad.


Hi, you need to change the convergence ICs , STKs: and some resistors,low values; , after changing them, you will have to go into the service mode, to do some adjustments.that's it.

Nov 27, 2007 | Samsung HCN4226W 42" Rear Projection...

3 Answers

Blue out of whack around sides


I have the convergence problem with the red. After reading your site I replaced the 2 ICs and the problem is worse. Before the only problem was I could not adjust the red horizontal. Now I have no control over the vertical or horizontal and the overall picture is very red and it bows at the top and bottom very bad. A friend said I might have the ribbon connector in wrong or the convergence (silver box?) box maybe bad. Any ideas? Thanks,Dave.

Oct 12, 2007 | Philips 55PP9352 55" Projection Television

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