Question about Hitachi 50UX57B 50" Rear Projection Television

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Picture pincushion I have a hitachi 50UX53K projection tv.Which is having a pin cushioning picture.The service tech just replaced the PNP module before this started.

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Converenge amp ic bad or loose connection
· http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
· http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on Jan 07, 2008

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Posted on Jan 02, 2017

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1 Answer

Hitachi convergence problem


You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. Take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests.
Best of luck, hope ya fix it.

Jan 22, 2008 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

The background color on the tv is starting to bow in different directions. the original picture looks good but it looks like there is a shadow below it that is a different clor and wavy.


Hi, it's look like you have a convergence module defect and pin cushion problem;/after replaced the module the tv set will need to be adlust.....
that as to be done by a tech
hope that gives you an idea
have a nice day...

Apr 13, 2010 | Hitachi 51F500 51" Rear Projection...

1 Answer

Picture goes bad (fuzzy&scrolls&lines) on Hitachi projection tv


Sounds like your convergence modules have gone bad. They have 21 close spaced pins to unsolder and resolder. You'll need a soldering iron with a fine point tip and thin gauge solder to do the repairs yourself. Solder bridges between pins are common when soldering these module pins, so have some unsoldering wick handy if you're going to fix it yourself. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Jun 14, 2017 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Hitachi 50gx30B Pincushion problem


Please let me know in which direction the picture is distorted. Does it bow in from the top and bottom or left and right?

Thanks,
Dan

Mar 06, 2009 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

I have a 50 inch hitachi ultravision that has no picture or sound but power light is on


Probably a 'cold or detatched' solder joint on a component on that perticular circuit board you are 'wedging' with a plastic rod.

Apr 16, 2008 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

Pin cushioning or barreling.


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

Dec 25, 2007 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

I have a 50 inch hitachi ultravision that has no picture or sound but power light is on


you have lookse connection on the video convergance amp ic

KIT10 $29.50
Repair Kit for Hitachi convergence Chassis DP-14G
KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible resistors:


http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Nov 04, 2007 | Hitachi UltraVision CineForm 55VG825 55"...

1 Answer

Loewe TV with pin cushion distortion


Yes if you could give me a model #, it is probably a diode shorted in pincushion area, or a capacitor.

Oct 05, 2007 | Televison & Video

2 Answers

Compressed picture in the upper corners of my Daewoo DTQ-20U4SC TV


It sounds like you have a "pin cushion" problem. There is a "pincushion circuit in your set that causes it to make a "square" picture. Some component in this circuit has failed. I am assuming that your set is the "picture tube" type--- not LCD or Plasma. You need to have a tech check it for you. Stargazer

Feb 05, 2007 | Daewoo DTQ-20U4SC 20" TV

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