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Toshiba 40who8b convergeance problem

Picture bows up from bottom colours out syn

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Thats the one model Toshiba that I am not very famillar with, but i will try to dig up the chassis info and repost when I have the info in front of me.

Posted on Jun 23, 2008

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There is a wave/bow in the bottom and top of the picture on the screen of my Toshiba 70HX50. When I am in the grid screen in the service mode, it looks like the center is 'bowed' out. How do I adjust this...


Slight error in the alignment of a projection TV is pretty much normal. If the problem cannot be seen on a normal TV picture, I would not spend the money.
However, if the problem is severe and causes colour double images, it is convergence and will need parts replaced - about $200-$600 depending on service call, parts, labour, etc.
Minor adjustment takes a skilled technician. attempting it yourself will likely cause the set to stop functioning. (Digital adjustment is not forgiving)

Mar 30, 2010 | Toshiba 43H70 43" Rear Projection...

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

Blue color is off and bowed at bottom


Needs the 2 convergence amplifiers replaced and then convergence alignment carried out(Could be pricy)

Dec 04, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

RCA Projection TV Model #p46921, Has bowing effect of pictures


Go to Menu then setup look for convergence if you do not see convergence on menu then you have a open FUSE FL231 it is on right side of FBT flyback transfomer there is 3 of them small brown rectrangler looking caps it will be the one in the Middle.

Jan 31, 2009 | RCA R52WH73 Projection Television

1 Answer

Picture convergence problems


the stk's are the STK392-110 http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/69d5aa3584d015ce85256e780056e56f?CreateDocument
but you will also want to check all resistors on the STK's for values within 5% - 10% of said value

Jan 04, 2009 | Projection Televisions

2 Answers

Colour problem


6b5ee7e.png You may have a convergence problem. Here are some of the most common symptoms.

  • 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 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.


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 email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Dec 31, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Colours split and vertical bowed green line at to and bottom of s


This is a convergence problem that can be either poor solder connections at the convergence ICs or defective ICs. If you can solder and feel comfortable working inside the set where there are potentially dangerous high voltages, update this and further details and instructions will be provided.

Thanks,
Dan

Dec 12, 2008 | Samsung HLN5065W 50" Rear Projection...

1 Answer

Toshiba 40who8b convergeance problem


Good Day, harri1234;
Sounds like a convergence problem.
Convergence Output IC Failure
Corrective Action: Replace the defective Convergence Output IC Part Number 23905094 (STK392-110) using the revised “T” version IC Part Number 23135090 (STK392-110T). When Convergence Output failure is
detected, it’s recommended that both IC’s be changed to the “T” type IC
version.
Good Luck, Big Irish.

Jun 23, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Hour glass picture


I would suspect that the convergency amplifiers ICs are not working.
Are the colours distorted?

Jan 15, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Problem with convergence


bad convergence ic's
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 03, 2008 | Philips Magnavox 9P6034C 60" Rear...

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