Question about RCA D52W20 52" Rear Projection HDTV-Ready Television

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RCA r56wh78 rear projection screen is blurry

We got the TV, and the screen wasnt working. now we have color, but the picture is REALLY blurry. how do we fix the focus on the TV?

Posted by Babykitten16 on

  • Anonymous Nov 28, 2008

    it is blurry a round the sides of the t.v screen

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If you have little knowledge about electronics, you have to open the back of your tv and adjust the focus adjustment located at the back of the flyback transformer the large black colored like hard plastic... and if it is still not working replace the CRT socket....

Posted on Aug 11, 2008

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It is blurry a round the side of the screen

Posted on Nov 28, 2008

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I have the same model and the same problem - the picture just started getting slightly blurry, and moving objects get sort of grainy and jagged around the edges. I'd like to try the flyback adjustment you mention, but I have no idea what to look for. Is there a guide or reference that could help with this stuff? Schematics?

Posted on Oct 08, 2008

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I have a Hitachi 53UWX10BA tv. The picture colors are off and blurry. I ran magic focus and it showed a 4 on the bottom of the screen


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This article outlines how many TVs from around the turn of the century have had similar problems to yours.

I know bulb replacement is an option. You may want to call around to TV repair shops and see what your options are. In the end, though, it may be time to start saving up for a new TV.

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Hello paulaspec,

You have a problem with the three factors, and they are screen voltage, focus voltage, and control (focus 2) voltage. Basically these voltages have to be adjusted since the components in this section have aged some. These controls are usually located in the television on the IHVT (Integrated High Voltage Transformer) or as it is also called the flyback transformer. these controls must be adjusted together, along with the color controls. Here is how the adjustment is done (You will need a schematic diagram, a DC volt meter, and a color bar generator to do these measurments):

 

1) turn color and tint fully counter clockwise until you have a black and white picture.

 

2) connect the color bar generator to the TV (ch 3) and turn it on, you should see bars in various shades of gray

 

3) adjust as best as possible the color and tint controls to obtain the color bars on the screen Red Green Blue.

 

4) measure the voltages on the focus, screen and control grids of the CRT and match them to the schematic digram measurements.

 

5) adjust the focus screen and control grids to match the ones on the schematic diagram

 

6) once this is done then you adjust the color controls once again to obtain the red green and blue bars on the TV screen.

 

This should help if the CRT (picture tube) electron guns are still good and if the flyback transformer voltage supply is working.

 

However if you do not have a background in electronics please take the TV to a shop for repairs.

 

I hope this helps,

Thank you,

Shuttle83

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blurry picture is mainly due to focusing voltage is not proper. solution 1 check & adjust focus control on flyback. 2 check crt base for loose. 3 wire going to focus control on crt base got disconnected due to foreign materials deposit on it. 4 if tv is old possibility of crt getting weak.

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Each projection set has focus controls in back, usually they don't move or go out of focus unless someone moves it, but in your case if you open the back you will see a focus block with 6 knobs 3 are for screen,I would highly recommend that you don't move this. Look for the focus and you will have to set each with the one color. Cover the other two and adjust.

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