Question about Sony Grand WEGA KF50XBR800 50" Rear Projection HDTV-Ready Television

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Red-striped ghost images.

The set is a couple years old. When it displays images with dark areas bordering light areas, especially with dark appearing to the right of the light, a ghost image appears along the light side of the border. The ghost consists of red stripes that appear stationary relative to the image (i.e. moving images appear to pass by the stripes) but it only appears in the area along these light/dark borders. It appears in HD and SD, as well as signals through different inputs (cable box and DVD player, both connected via component cables). Adjusting the image revision didn't fix the problem. I have the same problem as described by the two previous writers.

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It looks like the convergency ICs are getting weak. These are signs that they are about to fail.
These ICs are mounted on a big heatsink (2 Ics) with the part marking STK392 XXX.
Let me know if you need more assistance.

Posted on Feb 05, 2008

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Red-striped ghost images. - ea7b59d.jpg
Are the stripes u are talking abt look like these? If yes these are called Moiré patterns.
Here's How to fix
them..

  • If your system has a Moiré Reduction Control similar to those in computer monitors, then you can use it to reduce or eliminate the patterns. Just make sure, you write your default settings before you change it.
  • Some folks have gotten electronic fixes (firmware or software) from TV manufacturers but results have been spotty at best.
Slightly defocusing the image via the mechanical focus of your set appears to be the best bet. This has been proven effective in various TVs. Be careful not to over do-it though so that you don't significantly degrade image sharpness.

Posted on Feb 05, 2008

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Hi,

First thing to do is the reset test. I give this a 50/50 chance of clearing it up. Disconnect the power cord for 4 hours. Then when you power it back up the internal soft codes will automatically reset to factory defaults.

If this doesn't solve ur problem then it is a convergence problem. it is a common problem. there is a adjustment in your menu for this. it might be called projector setup on your model. if this does not do it then you need a repair.

Good luck
Please don't forget torate me as fixya..

Posted on Feb 05, 2008

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It must have undergone disturbance due to electronic components in and around the set and when its workload increases i think it is having problems in the display.... do u keep any equipment that is electrically noisy near your TV set like mobile, refrigerator, electric cooker etc....

Posted on Feb 05, 2008

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1. Power off -- let bulb cool.
2. Display - 5 - VOL+ - Power (in quick sequence) to display service menu.
3. Go into the user menu and set auto revision back to auto.
4. Put an image on the screen that shows the problem. I always found the edges of a 4:3 aspect ratio signal displayed the ghosting very well on my set.
5. Use 2 to scroll through the categories to find D GM TG
6. Use 1 to scroll through items in D GM TG to find V POS D
7. Write down current value.
9. Use 3 and 6 to change the value to minimize the ghosting. You should only need to move it up or down a value or two.
10. Press Mute - Enter to save the changes.
11. Power off and let the bulb cool.

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