Question about Toshiba 43H70 43" Rear Projection Television

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Arched picture at bottom seperating the green and red

Hi, I'm having trouble with my projection tv. It curves at bottom third of screen upward from right to left creating an arche. Also the colors seperate green from red in this area. I've removed the center magnifier lens which is the green one and covered to lamp. This fixes the curved affect but obviously the green is ommited. Is this a lamp or a lens problem? Thanks in advance for any assitance you can provide me.

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Re: Arched picture at bottom seperating the green and red

Your tv has a convergance failure. the convergance ic's need to be replaced. Upgraded part # STK392-150 or STK392-160. Both ic's should be replaced to prevent future failure of other colors.

Posted on May 23, 2007

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Problem #1) Convergence

  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
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...


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2 Answers

Colors arched and overlapping

if the option for convergence is still listed under the setting section of the on screen menu, then you need a convergence power supply board. If the convergence option is missing from the menu you need the ITC222 convergence missing repair kit. You can get either one at the following link they include instructions for the repair.

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1 Answer

Colors have seperated on tv, and curve

You have a convergence problem.
Maybe need change the IC of convergence, or the power supply of these parts.


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Red, Green, Blue curve upwards and cast shadows

that sounds like a typical Convergence IC problem..

this is a picture of what typical convergence ics look like

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Color seperation on rca 1998 46" rear projection tv

projection tvs have seperate color bulbs that put out the same picture the lenses just need to be adjusted. they probably shifted during the move.

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1 Answer

Uh oh... the colors are curved and wacky

replace the amplifier IC chips for the convergence.  part # stk392-???  could be from 040 to 120..  90% chance that'll fix it.

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3 curved lines top & bottom/blurred picture

This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

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Toshiba 43H70 HD Projection TV

this is a convergence failure, there are hundreds of posts about it on this website you should be able to find everything you need

May 23, 2007 | Toshiba 43H70 43" Rear Projection...

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