Question about Toshiba 57H81 57" Rear Projection Television
Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.
The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs.
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Posted on Oct 15, 2010
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Posted on Jan 02, 2017
SOURCE: Warped Picture, Separated colors
Each color (red,green & blue) has an amplifier IC (STK-).
When there is a convergence issue,the first step is change both
IC's for reliability. Then check for open fuses devices,usually
pico fuses.Then re-check convergence alignment.......T.
Posted on Oct 23, 2007
When the convergence amplifier ICs go bad (STK392-xxx), they RARELY cause more than one color to go out. The fact that the top and bottom of the picture are effected indicates the vertical convergence IC. Replace both, and while you're in there check the bias resistors... it is likely one of these is open. Once the ICs have been replaced (as well as any open resistors), customer convergence followed up with the auto convergence should do the trick.
Posted on Mar 10, 2009
SOURCE: rear projection tv screen warped
HI, this is typical convergence chip failure. you will need to replace the convergence board in this set asap. this will fix this issue you are experiencing.
Posted on May 23, 2009
The model indicated is a projection set and the question is does it look 3d looking etc or something else?
See attached photos of typical convergence problem which MAY be what you have.
Posted on May 02, 2010
SOURCE: warpped TV picture
There are two problems here but may be caused by one component
The flyback transformer or transistor equivalent is faulty The colors are warped convergence controls which may be due to a faulty sustain board or part of the first problem. DIY is not an option and repair estimate is about $3-400.00
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Posted on May 29, 2010
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