Question about Hitachi 53UDX10B 53" Rear Projection Television

2 Answers

Bow in pic

Top and bottom bow down and up
need help
Had the conv. bored fix and still doing it.

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  • Rick Rock May 16, 2008

    convergence ICs have been changed twice. No luck.

    No magic focus just 3x3 screen of + signs

    red is way off, all bowed inward.


  • ernie trumpold May 21, 2008

    Would it make a diff. if you cut one side?
    I tested all resistors and they come up fine,But i have not tried this.
    I think i only have two 3.9 on the bored.


  • ernie trumpold May 21, 2008

    WY do you have to do this to test the resistors

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UPDATE

OK, I have replaced the RK46, the colors and everything lines up now. There is not quite as sharp of an image as I remember. There is no longer a RED issue. some grainy looking areas and MAGIC FOCUS is still non working.

As stated above I am going to replace more resistors, hell I might as well change them all they are cheap enough. I hope this sets my auto focus back on.

Also looking to get my Media Center Centered on the screen, this was always centered before this whole problem started, Resistors again, maybe?

Posted on May 26, 2008

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  • Hitachi Master
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Sounds like some of the 3.9ohm 1 watt resistors are open some will get destroyed when the ICs go out and you can tell by looking at them they need to be checked with one side unsoderd and lifted from circuit

Posted on May 21, 2008

  • Sonny Berry
    Sonny Berry May 21, 2008

    Just unsolder one side of the resistors to check and then do a reading if it doesnt register you will need to replace it. The other resistors are 1.8ohm 1watt, 4.7ohm1watt, 22ohm 1watt and 2.7ohm 1 watt. both ICs will have the same number and rated resistors. you cant cut one end as the shock can easially destroy the resistor just heat up the solder on one side and lift that end up out of circuit to test the resistor.

  • Sonny Berry
    Sonny Berry May 21, 2008

    if you dont lift one side of the resistor an open resistor can give a false reading by measuring the resistance in the circuit around it. Any time you check a resistor or diode thats the proper way to do it so if its open you wont get any reading and then you will know that it has to be replaced.

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2 Answers

I have the same problem with a 61uwx10b. I


the ics could have been defective, or maybe you missed a resistor or something. the ics could short out and cause the tv to totally shutdown if dead shorted, as some of these have no fuses. I would doublecheck all your solder connections and make sure nothing is shorted out and look for other bad resistors. here is my tutorial if this helps
http://www.fixya.com/support/r5001731-convergence_diagnosing_convergence
Let me know if I can be of further assistance.

Jun 13, 2010 | Hitachi 61UWX10B 61" Rear Projection...

2 Answers

The pic is off there is bowing at the top and


Picture becoming distorted at the top/bottom of the screen is due to the convergence circuit going bad, and is a common issue with big screen projection TVs.

The convergence circuits will need to be repaired, which will generally require some soldering and ordering new parts for ~$75. If you want to get a TV technician to repair it then you will probably be looking in the region of about $300 for a repair.

Here is a link to repair guide for a Mitsubishi TV. Obviously a different model, but the convergence circuits are generally the same for most makes/models - this will give you an idea of the work involved to fix it: http://www.techlore.com/article/22530/DIY-Repair-Replacing-Convergence-IC-s-on-a-Mitsubshi-TV-Set/

Nov 17, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Cheap Fix?


I will strongly advise you to replace the two STK392-120 as a pair. and this will cure your bowing picture problem. You may need to re-converge your set. best of luck.

Nov 05, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Double focused, red and green, bow in picture top and bottom


hi
You have a convergence problem
If the set has auto focus and will not complete its cycle.
The Auto focus module is bad, (expensive)
If it completes and the problem is still there.
Then check for bad conv. drivers (stk****) or cold solder joint on one or more of the 3 drivers pins.
Guy9

Jul 08, 2008 | Hitachi 65S700 65" Rear Projection HDTV

1 Answer

Conv problems with no pic has sound


Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projeciton sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some photos of convergence problems.

42d3683.jpg

7859b01.jpg

e87380c.jpg
Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Apr 30, 2008 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Toshiba tos-50h81 convergence issue


you have this in your menu. but your menu will not adjust and fix your problem. if all three colors are bowed in at top and bottom...red green and blue... then you need to change all convergance ic's and check fuses. also there might be some solder in fuses hiding on the board. Need to also check all fuses around conv ic's and around conv yoke plugs.
good luck.

Apr 10, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Apex gb55hd09w triple vision


Go in and find the conv ICs, they will be mounted on a
big heatsink and the wires going to the conv yokes will
most likely plug in somewhere closeby.
Conv ICs are the workhorse of the CRT RPTV, and it is
not unusual at all for them to need to be changed out
at some time in the life of a CRT RPTV.

Mr Bob

Comment by MrBob84, posted on Feb 04, 2008
PS -
The wires for the conv yokes at the CRT necks are the
thin ones. The thicker ones are for the hor and vert
sweeps, which must never be disconnected from their
circuitry during CRT operation.

If your beam loses sweep on any of the CRTs, it will
instantly score/gouge your phosphors on your CRT faces,
vaporizing the phosphors there and ruining the CRTs.
The beam is very powerful, but in normal operation
moves incredibly fast, not damaging anything. Any
slowdown of the movement of the very powerful beam that
draws the picture, acts like the searing vaporizing beam in Tom Cruise's War of the Worlds.

Feb 04, 2008 | Televison & Video

1 Answer

Buckshot again no improvement


the 999 ohm is probably the bad one thats high for a conv ckt. also i would use the amps the tv calls for that upgrade stuff does not always work out like you think it should.

Apr 21, 2007 | Zenith IQZ60Z97D 60 in. Rear Projection...

1 Answer

Bow at top and bottom of the screen


http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 10, 2007 | Samsung HCM5525W 55" Rear Projection...

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