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Question about Toshiba 57H81 57" Rear Projection Television

2 Answers

Bowing at top and bottom, can't adjust convergence replaced IC

Hello, My tv looked like it was in 3d and the convergence was off, so I figured the IC was bad ordered the part and replaced it the picture looks better but now it is bowing and with red bar on one side and blue bar on the other. I still can't adjust the convergence words still look double vision. Please help.

Posted by joeczamora on

  • joeczamora Mar 22, 2009

    I'm sorry, I posted in the toshiba section, my tv is actually a mitsubishi but my problem is a convergence problem. Like I said I ordered the replacement IC and did the repair and now my problem looks a little differenct than before but I still can't adjust the covnergence. I was thinking maybe a resister but don't know how to check on that. I emailed tvrepairkits so if I don't get a do it yourself recomendation, I'll see what they say.



    Thanks

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2 Answers

Anonymous

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You must have the original toshiba remote control in order to fix this problem,if you check th resistors are ok ,you have to go to the aligment by push and hold mute buttom on the remote control and menu in the front of the tv set,

Posted on Mar 22, 2009

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Your TV most likely has one of two 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.
Bowing at top and bottom, can't adjust convergence - 701cb04.jpg
f0900cb.jpg
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 tBowing at top and bottom, can't adjust convergence - 2c07611.pngdirections 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 becomeBowing at top and bottom, can't adjust convergence - 578ba6c.jpg cause the screen to look dull, red/orange, etc. YouBowing at top and bottom, can't adjust convergence - 65af323.jpgee halos around imageBowing at top and bottom, can't adjust convergence - 2c07611.pngr />Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

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.

Posted on Mar 22, 2009

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0helpful
1answer

There is a constant blue shadow and yellow bowing from the top of screen. Needs convergence circuit repair = replace convergence IC's, How is this done!!!

Please do us a favor and rate this by cliking the thumps up icon located here >>>>>>

Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

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 pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common 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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.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
0helpful
1answer

Tv turns on. There is a picture but it looks like your looking through a fish bowl. Bowes into the middle from both sides. It also looks 3D. Any Clue??

This is usually a convergence problem, although the bowing normally is from the top and bottom rather than from the sides. There may also be an issue with the pioncushion circuit that causes the bowing. Try the automatic convergence adjustment first. If that fails to resolve the problem, then resoldering the convergence ICs would be next followed by replacing the ICs should the resoldering fail.

If you wish to attempt the repair, please update this and confirm the model number to be VS-60607 and I'll provide additional details.

Thanks,
Dan
2helpful
2answers

The pic is off there is bowing at the top and

Picture becoming distorted at the top/bottom of the screen is due to the convergence circuit going bad, and is a common issue with big screen projection TVs.

The convergence circuits will need to be repaired, which will generally require some soldering and ordering new parts for ~$75. If you want to get a TV technician to repair it then you will probably be looking in the region of about $300 for a repair.

Here is a link to repair guide for a Mitsubishi TV. Obviously a different model, but the convergence circuits are generally the same for most makes/models - this will give you an idea of the work involved to fix it: http://www.techlore.com/article/22530/DIY-Repair-Replacing-Convergence-IC-s-on-a-Mitsubshi-TV-Set/
0helpful
1answer

RCA mm52100

Ok thanks for the info Now this is an indication of convergence issues(3d effect) the bowing issue idicates a complete loss of convergence power. which possible could be the convergence ic or the actual power feeding them. im feeling like it might be the ic overheating these get very hot. now the bad news. this is a set that is very difficult to work on. Rca has compiled a long list of problems with this set. getting to the chips is a chore. i cannot recommend repairing this set. I know no one likes to hear this.

there are several rca issued suggestions. the top one isChange C19542 on the Digital Convergence PCB from a 10uF 63WVDC capacitor (214698) to a
470uF, 25WVDC capacitor part number 214746.
Also change the 24V zener diode CR19720 (226446) on the Convergence Power Supply board to a
30V 500 milliwatt zener diode, part number 231211 this
but as i said this may or may not be the best solution

0helpful
1answer

Red convergence bowing

Replace both of your STKs if they are STK392-110s upgrade to STK392-180s these are the convergence ic big black ics 2 of them. Electronix Parts 1-800-223-3205
0helpful
1answer

Picture is bending at the top and bottom and looks 3d

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. 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, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

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

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find a fix here
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull
0helpful
1answer

SPEED BUMP OR BOWING

Your convergence chips and convergence resistors are going bad. When they fail the screen colors will look distorted/3d looking. Another symptom is one or more colors can't be converged using the convergence menu. You can purchase the parts over the internet. Just make sure you get Sanyo brand convergence chips and the correct flame proof resistors. You can also check the site www.TvRepairKits.com for a kits.  Just make sure you replace both of the convergence chips and all of the convergence resistors. 

0helpful
2answers

Horizontal bow and shadow

Replace convergence IC's--then re-check convergence alignment in servicer mode,if necessary.
0helpful
3answers

JVC 56wp30 convergence

Your TV most likely a convergence 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.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
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.
0helpful
1answer

Bowing image top and bottom of screem

No im sorry there is nothing to do but replaceing the convergence IC
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