Question about Hitachi 53UDX10B 53" Rear Projection Television

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Hitachi 53SWX01W Distorted red lines and shadowing.

Something appears to be happening mostly with the red CRT causing distorted red lines and red shadowing. Any suggestions?

Posted by CMac1980 on

  • Anonymous Apr 17, 2008

    4/17/2008 Our problem is the same except our problem has a blue line where theirs is red.

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Anonymous

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Replace the conv ic,s stk392-110 and ck for any bad rest in that circuit

Posted on May 10, 2008

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Verticle lines appearing near top. Reminiscent of more extensive problem a few years ago that repair man said were related to electronic equipment used nearby such as vacuum cleaner. He fixed it with...


Case 1:
If the horizontal lines are red, green or blue or white, and are slanted about 15 degrees up going left to right, they are "vertical retrace" lines. These are caused by the beam current in the offending gun being left on while the vertical deflection is retracing from the bottom to the top on its way to start drawing the next frame. The usual cause is the CRT screen setting being too high (too bright), but (rarely) it could be something wrong with the vertical blanking circuit. Since it is dependent on vertical position, I would check the power supplies feeding the vertical deflection circuit and the CRT bias voltages, especially if they share the same filter capacitor.

Case 2:
If the lines are true horizontal, and colored similarly to the picture (sometimes alternately white and colored the same as program material), the top of picture is folded over itself because of over-voltage distortion ("clipping") in the vertical drive. In this case, reducing the height of the picture also reduces the fraction of the picture with the lines, and may eliminate it. If you are unable to get a full-height picture without the lines, then you should check the vertical deflection circuit for leaky capacitors (also check the power supply voltage going to it).

Case 3:
Several times I've observed bright white lines with random interruptions at the top of a picture supplied by the local cable company. These often occur on one or a few channels for a time (once or twice I've seen it on all channels), and go away after a while. This is a glitch in the cable service.

Case 4
You have a zone of weird colors at the top of the screen. This is probably caused by magnetization of the shadow mask inside the front of the picture tube that is not being erased when the TV is first turned on. Check to see if somebody left a magnetized object on top of or above the TV (look behind the set also). If you find something remove it, turn off the TV, wait a few minutes, then turn it on again. (Explanation: the TV has an internal demagnetizing coil that operates only when you first turn it on. It uses a self-heating temperature-dependent part to gradually reduce the alternating current going through it to override and "fade out" any stray magnetism in the shadow mask.) If the internal demagnetizing (AKA degaussing) coil isn't strong enough, you'll need that "ghostbuster" gadget again. If you don't find an external magnetic source, the internal coil may have slipped out of place at the top of the picture tube and is too far away from the shadow mask, or something is wrong with the degaussing circuit.

If none of these cases match what you see, try a more detailed description of the lines and I'll give it another shot.

Nov 27, 2010 | Sony Televison & Video

1 Answer

Hitachi 53SWX01W Distorted red lines and shadowing.


that is from a bad video board..try turning it off to reset the values, but I'm not confident it's recoverable without some serious technical help

Apr 27, 2008 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

The picture appears like a 3D picture with shadows. Usually tripled, and colors are strange. Peoples skin appears orange'ish-red, and white appears greenish...almost like holograms.


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 over.


You can find more details and solutions here on Fixya at the following link below. Or click HERE

3d884ac.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Oct 24, 2010 | RCA P52939 52" Rear Projection Television

1 Answer

Distorted Color and geometry of Picture


replace stk 392-110 ( or stk 392-150 same number) , check resistor 2.2 ohms for open or burn beside STK IC's

Apr 13, 2009 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Sony trinitron xbr red diagonal lines appears then screen turns red and then shuts off. The red led light blinks 7 times. PleaseĀ Help!!!


In cannot remember if this model of set uses on the CRT drive board a drive IC for the CRT colour channels, or if it uses descrete transistors. I have had component failure on this board that causes your description. The failure in your case would be with the red channel drive. Most of the time I had the semiconductors fail, and some of the support components.

Most of the time, a failure on this board is caused by some intermittant internal arching inside of the CRT. If this happens, the CRT is starting go defective.

Another cause of this fault is that the CRT is starting to go internaly shorted between the control grid and screen grid. As it heats up, the shorting becomes lower in resistance, and thus causes the pricture to go brighter until the protection turns it off. This would be with the red electron-gun.

With any failure with the CRT, the set is not worth to fix even if you can find a CRT for it.

Jerry G.


Dec 22, 2008 | Sony FD Trinitron WEGA KV-36XBR800 36" TV

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Lines horizonal - seems to be caused by voltage to green CRT


Your green CRT is shorted. To test put your red crt socket on the green and your red on the green. then try turning up red control if the green now works its not your tube. If the same thing happens with the red socket on the green you can be sure its the green CRT if the green works properly with the red socket, then you have a problem in the green drive circuit and not the CRT. hope this helps.

Jan 19, 2008 | Mitsubishi WS-55313 55" Rear Projection...

1 Answer

Toshiba 50H82 blue arcing?


color shadows on numbers or letters indicate a possible convergence problem.. might be a crt deflection problem.

Dec 18, 2007 | Toshiba 50H82 50" Rear Projection...

1 Answer

Color distortion


There are failures occuring in the scann and convergence circuits. This may not be feasible to service.

Jerry G.

Dec 14, 2007 | Sony KP-43T90 43" Rear Projection...

1 Answer

Green wave-like color distortion over reds


do you happen to have any speakers of any size within about 3 feet in any direction of the tv?? move them if so, I have large speakers about 5 feet from my tv at home and i still get some distortion once in a while with red and dark green streaks.

Aug 15, 2007 | Sony WEGA KD-34XBR970 34" TV

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