Question about Hitachi UltraVision CineForm 55VG825 55" HDTV

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Hatachi big screen

Very little color on green projector

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Re: hatachi big screen

Good Day, whataboutbob;
Try to replace the drive PWB assy Part number: JP08481.
Good Luck, big IRISH.

Posted on Sep 06, 2008

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I have some picture distortion - pink fuzzy color where white should be (like on hockey ice). I'm trying to determine if the t-con board is to blame and if I might fix it easily

Hi Bill.

I don't see a specific model for your TV, but have owned a rear projector system before. There is usually a sub-menu where you can do fine alignment of the Red, Green, and Blue projectors to get rid of the pink fringe. There is generally a white crosshair at center screen where you can fine align the three colors to get rid of the fringing, and sometimes an advanced menu where there are crosses all over the screen that you can individually select and fine tune, (tweaking the different optical distortions of the individual projectors to overlap).

If the fringe is a big swath instead of a fine edge, or if a color is totally gone, then you may be talking power amp issues. For fine fringes, the adjustments usually work fine.

Hoping that helps!

Dec 18, 2015 | Projection Televisions

1 Answer

Screen has green tint, it is an LCD 42 inch

First of all, that is not an LCD tv. It is DLP, which is a common mistake because the picture is very similar. DLP tv's use a high-power lamp that reflects light off of thousands of tiny mirrors into a spinning color wheel which gives the reflections color. Each little mirror is one pixel, which can be any color depending on the hole that it goes through on the color wheel. The color wheel may be spinning slower than normal, which could make all of the light go through the green filter on the color wheel, and give your screen a green tint. Have a trusted mechanic take your tv apart and dust the inside. If that doesn't fix it, you may need a new color wheel or bearings for it (that help it spin). You should not pay more than $200 for a bearing replacement on this tv.

Thanks for asking.

This pic might help your understanding.

Feb 28, 2010 | Panasonic PT-43LC14 43" Rear Projection...

1 Answer

The color seems to be off. No red, and lots of purple. This is a Toshiba 57H81 wide screen big box tv. It was purchased in 2002.

Could be a bad board within the tv but it is sometimes the source input meaning it could be dvd player, cable/satellite box, etc causing the loss of color but it is unlikely. I have one of these tvs and they use red green and blue projectors to reproduce the colors so when the red projector fails then you get purple which is green and blue colors combined without the red. I have found it to be sometimes a bad connection inside the tv and I found insects such as roaches inside others. Using extreme caution when opening the rear cover of any tv due to dangerous and fatal high voltage. You might find that simply cleaning out the inside of tv and reseating all the connectors might resolve your issue otherwise you would have haul this tv to a repair shop where you pay half the price of a new flat screen lcd for just repairing this tv which will probaly have another color go out next month.

Aug 15, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

The colors blue and green on the screen and a big circle in the middle of the screen it makes everything look green

This is generic for CRT based projectors and is cloudy coolant in the CRTs
Another problem is poor connections on the CRT bases

Jul 07, 2009 | Hitachi Projection Televisions

1 Answer

Samsung HCM5525W 55inch

This is a convergence problem. It happens to all big screen rear projectors. The convergence output ic's need to be replaced. I would let a repair man do this.

Nov 11, 2008 | Samsung HCM5525W 55" Rear Projection...

1 Answer

Color out of convergence.

Good Day;

Sounds like the CONVERGENCE IC has failed >STK-110 > 267P155010. TV only Uses one.
Good Luck, big IRISH.

Aug 31, 2008 | Mitsubishi WS-55511 55" Rear Projection...

2 Answers

I am told my Hitachi 61SDX01B (UltraVision/Ultrascan) has "Green Geometry"

Sounds like a convergence promblem.

Here are some of the most common symptoms of a convergence problem.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

Try to adjust the 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.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

Oct 15, 2007 | Hitachi 61SDX01B 61" Rear Projection...

1 Answer

Hitachi 61SDX01B

The problem is called green geometry.There is nothing wrong w/the green pix tube.It is critical to get the green geometry

accurate because the red and blue convergence overlays on

the green.If you have more than an alignment issue,that will need

repair before adjustments are attempted.

Oct 15, 2007 | Hitachi 61SDX01B 61" Rear Projection...

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