Question about Samsung HCN5527W 55" Rear Projection Television

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Color problem replaced color convergence unit and blue color will not auto or manual focus after repair. When attempting to auto focus it stop around 37% when the blue start it repeat maybe twice and aborts the focus procedure.

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  • Anonymous Jun 21, 2008

    I just changed the convergence board, now the auto focus will not finish, it gets to about 37%. What can I do?

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No I haven't found a solution to the problem. However I understand that you have different options of support and some of them requires a payment service. I will try and get some assistance here locally in the area. Thank for the response.
Big12

Posted on Apr 06, 2008

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Is there a way to manually adjust the convergence on a Hitachi HDTV modol #43FDX15B?


Hi James,

If Auto Focus (Auto Convergence) won't complete the set-up stop trying to adjust it. There is a fault in the convergence circuit!! ICs have to be replaced and maybe some burnt resistors.

If you access the service set-up menu and try to adjust the "defective" circuit the Auto-focus may not work correctly after the IC's, etc are replaced. Experienced technicians know that the service menu allow easy resetting to correct the misalignment, etc. "First Time" technician can be easily misled, waste a lot of effort and never get a correct picture.

If you want to attempt the repair, buy the correct parts from a service guy that does this type of work. I suggest having the repair done by a local competent technician that is experienced with Hitachi Convergence Problems. It is considerably more challenging than changing a fuse.

Our Convergence Gallery shows a variety of Convergence Faults. If you live in Toronto, ON., Calgary, AB., or Vancouver BC. it costs $257 for Hitachi in home convergence repair.

Good luck.

Robert

Nov 17, 2015 | Hitachi Televison & Video

1 Answer

Hitachi 43fwx20b. Blue color will not reset in auto or manual focus. If it is convergence what and where do I need to look to locate them in the set?


the convergence is an automatic adjustment. if the auto isn't working after you tell it too from user menu,then the convergence amp is not working. this requires a tech or a good hobbiest. most of these amps are just ( stk's ) chips 3 in the unit you should replace all 3 making sire there is enough heatsink compound on them.

Jun 21, 2010 | Hitachi 43FWX20B 43" Rear Projection...

3 Answers

I just auto convergence my zenith tv and it fixed but still 3-D


Ur tv convergence ICS are dead.That why ur colors lines green,red,and blue are not linning up,and the colors look like 3-D pic.Must have soldering tools,and know soldering to fix convergence problems.Must replaced 2 STK convergence ICS and some or all of it resistors.Tries websites like Tv repair World.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for the parts and labors.

Apr 29, 2010 | Zenith R56W36 56" Rear Projection...

1 Answer

Toshiba 57hx81 tv has a bow at bottom of screen and blue in color tried using toush focus & got error then tried to focus manually & couldn't get the bottom lines to focus all the way down


noted in the owners manual, if auto focus returns message "error" , it suggests to use manual convergence setting..failing that, is it resonable to suspect that the STK-392-110 (convergence (2)chips)are beginning to fail, bendt horizonital lines is the effect. you can check all the resistors and pico fuses (power board)near the chips for shorts, chances are they are ok. seeing that there is somewhat of a picture (kinda like 3-d). i would repaired it!.. while your there do the hyperboard repair as well by replacing the 10 caps with 16v@10uf. (causing a wavy vertical distortion effect).

Jan 12, 2010 | Toshiba 57HX81 57" Rear Projection...

1 Answer

Blue color out of focuse


Replace both of the STK392-110 Convergence ICs. You can get them at the following link with free instructions on how to replace them.
http://servicemanuals.vstore.ca/

May 22, 2009 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Auto focus and manual focus(red+will not move left


Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • 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.
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Here is a quick test....

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

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

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

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

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TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Apr 17, 2009 | Sony KP-57WS510 57" Rear Projection HDTV

1 Answer

Convergence problem


Replace the Convergence amplifiers. Mine did the same. It was like watching a 3D movie without the glasses. It is not hard to do for someone who knows their way around a circuit board repair. Otherwise call a reputable service shop.

Jun 17, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Pt5499hd akai


It looks like you may to replace the convergence units. It will require repair.

Jun 03, 2008 | Televison & Video

2 Answers

Convergence problem????


Yes Its the stk Packs,They are usally 18

Jul 23, 2007 | Toshiba 42H82 42" Rear Projection...

1 Answer

Auto focus not fixing blue shadow


Well now the convergence IC's need to be replaced. they are two black IC on a metal heat sink and they start with STK on them. If you dont understand the schematic, dont attempt this repair by yourself, as you have to unsolder the old ones and resolder the newer ones back in. Also you may have small fusable resistors that went out also if the iC shorted out. Also the heatsinks need heat grease on them. seek out a pro to assist you in this repair.

Sep 07, 2006 | Samsung PCN5425R 54" Rear Projection...

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