Question about Hitachi 50UX57B 50" Rear Projection Television

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Set will not power on

The blue and yellow colors began to ghost and now the set will not power on.

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  • Hitachi Master
  • 5,138 Answers

Replace both of your STK ICs STK392-110s use 120s or 150s Mats has them 1-800-628-1118
ck Low ohm resistors in same circuit 1.2ohms -3.9ohms

Posted on May 29, 2010

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Posted on Jan 02, 2017

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Blue, red and green are very average quality but yellow is not visible. On a windows xp test page. the yellow is replaced with an orange color. A logo test page indicates some ghosting/shading - for...


Ghosting and shading on this series printers is usually caused by either a bad fuser or out of date firmware. There were fixes in firmware that stopped ghosting from happening. As for the cleaning the lens. These models have a bad habit of collecting dust on the inside of the scanner unit and the only way to resolve that is disasemble the laser unit and clean the inside of the lenses.

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Ghosts


How old is ur tv...? Cos the wear & tear is the cause for this ghost appearance. The repair for this is only temporarily. It can not be eliminated completely.

Generally the blue ad yellow colour can be removed by a tool which is available with a tv technician. It is not very expensive to do this. Hoping to hear from you.

Thankyou

Apr 14, 2008 | Samsung HCM5525W 55" Rear Projection...

1 Answer

Images have some ghosting, but convergence lines seem to be OK. For example, white images have a yellow shadow to the right of image. Any suggestion?


Some easy steps to determine where and what your problem is:


1) In customer menu select convergence and then advanced (done with the Mitsubishi remote) look to see if grid of lines straight and if "yellow" is seen there.

2) Look to see if it happens when DVD etc played; If only on component from a cable or sat box but not on tuner or DVD inputs it is not the set.

3) Go to a channel that is in black and white and in customer menu turn COLOR all the way down: is problem still there or not?

If problem is not convergence and is present on all inputs it will be a problem with one of the three CRT boards; they plug onto bottom of each of the the three picture tubes this set uses; yellow suggests a problem with the blue one______loss of blue may give you a yellow smear around things/ red and green equal yellow.

You do not need to take the set apart for this.

Let me know what you find, the more you rule out the easier it is to know where the problem is.


SD TECH

Jan 10, 2011 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Ghost image in blue and yellow colores


The model indicated uses two STK-392-150 CHIPS OR 110 CHIPS.

It sounds like a convergence problem and I will attach two photos here of typical sets with this trouble. See if either look like your kind of problem and if so I can tell you what is needed to repair the set.

SD TECH



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May 02, 2010 | Hitachi 51F500 51" Rear Projection...

1 Answer

Blue and yellow convergence? problem...power light blinks 6 times


This is a common problem. Its called a convergence failure. You can get all the parts from www.TvRepairKits.com

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted

You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jan 28, 2010 | Sony KP-51WS510 51" Rear Projection...

1 Answer

We have blue ghosts with brilliant colors


This sounds like the most common thing that fails on projection TV's, regardless of the brand. The convergence circuit has two STK392-110 IC chips mounted on heat sinks to drive the convergence yokes. They typically last anywhere from 5-10 years, then they fail. A more robust part is now available (STK392-150) as a direct drop-in replacement. My shop has installed these IC's in hundreds of projection sets and had fewer than 1% of them come back with repeat failures. Also check the following low-ohm feedback resistors to make sure they did not go out of tolerance:
  • RK42: 2.7
  • RK46: 2.2
  • RK58: 3.9
  • RK52: 3.3
  • RK50: 3.3
  • RK54: 2.2

Jan 25, 2009 | Hitachi 50UX52B/53K 50" Rear Projection...

1 Answer

THE RED, BLUE, AND YELLOW COLORS SEPERATED ON A 52 IN HDTV. THE PICTURE SEEMS TO HAVE A GHOSTING EFFECT TO IT


Have you used the color convergence settings on your TV?When the settings are off you will get this effect sometimes if the TV was jarred pretty hard it goes out of alignment.There should be a setting on your menu.If that doesn't help it may need re aligned by a repairman.

Aug 10, 2008 | RCA Televison & Video

1 Answer

Hit 53UWX10BA


convergance ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

Dec 14, 2007 | Hitachi 57SWX20B 57" Rear Projection...

1 Answer

RCA 52" HDTV Rear Projection TV MM52110JX1


Replace FL231 400ma fuse. this will fix your problem.

Oct 26, 2007 | RCA D52W19 52" Rear Projection Television

1 Answer

Blue/Yellow in upper left corner


I have the same problem and now there is convergence problem with the entire screen, double images and ghosting ...i was told that some IC's are burned our ...etc..i'm waiting to see if they sell the entire board since the TV's are 10 years old... will let U know what i get as a response.

Jun 05, 2007 | Hitachi 50UX26B/27K 50" Rear Projection...

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