Question about Hitachi 61SDX01B 61" Rear Projection Television

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Hitachi 61SDX01B I have a Hitachi 61SDX01B (UltraVision/Ultrascan) TV that is about six years old. The following is a summary of the problem and what I have do to date: Symptoms: At the top of the screen, there are lime/green horizontal wavy lines that continuously appear. Regardless of the mode (TV, VCR, DVD) these wavy lime green lines are visible. At the bottom of the screen there is a smaller amount but the same condition. The wavy lines at the top are always lime green, while at the screen bottom, the wavy lines seem to vary in color as the picture changes. A bit of visual distortion (not with the picture) but rather with the channel header word & number that are in green (ex. channel 2, 4, 7, 56) It has a wrapping effect, like green text and channel number are being pulled towards the back of the TV from inside. Actions: I took off the big black top back cover (it houses the mirror) to inspect the inside. In inspecting (rt to lt) the red, green and blue projectors I saw not comestic issues. The lens did not seem excessively dusty but I did gently, gently vacuum to remove light dust and spider webs from inside the entire area (not alot). Next, I removed the green proejctor lens and I could see the above symptoms only in the green projector which was the only one with a TV picture visible. I then replaced the big black cover and remove the lower bottom fiberboard cover (it has numerous holes in it). I immediately gently, genlty vacuumed the dust and spiderwebs off the circuit board and surrounding area. I was careful not to touch or bent anything. Needless to say, nothing improved the symptoms. The only other thing I found was that by putting a small piece of white paper of the green project lens (this while I still have the lower fiberboard off), the TV picture had a strong red hue, but the symptoms were gone. Except for the strong red hue and not being able to see any green colors (ex. can't see the channel text/number) the picture was fine. Questions: What is causing this symptom with the green projector? What should I expect to pay a repairman? Is the repair worth it? Thanks In Advance [email protected]

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  • egbell Oct 15, 2007

    10/15-1:23pm: The feedback from "Terryfic" is appreciated but is very limited in regards to answering my initial three questions. I now have a name for the problem "Green Geometry" but no specifics on next steps:

    **How to correct "Green Geometry", if it is an alignment issue(simple enough for the avg. user to tweek or should I get repairman)?

    **What are reason cost for resolving the symptoms of "Green Geometry"?

  • egbell Oct 16, 2007

    Can anyone suggest a good TV repair person in the metro-detroit area (area codes 248, 313, 734, 810, 586 Michigan)?


    Also can anyone have provide with experience/insight on what the to expect for  alignment/"green geometry" repair cost?



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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.

Posted on Oct 15, 2007

  • Vista Electronics Oct 15, 2007

    geometry means all alignment grid lines relatively straight,

    horizontally & vertically.Alignment procedure is in service

    literature and/or a skilled tech will be needed.


    The green convergence IC could be defective.



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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.

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