Question about Samsung PCN5425R 54" Rear Projection Television

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Auto focus not fixing blue shadow

At power on, the picture has a blue shadow. I used the auto focus feature several times. Red and Green are good, but when trying to set the Blue, the box is centered from the top to the bottom, but is slightly shifted to the right; and the line running from top to bottom is wavy. I downloaded the service manual, of course I'm not able to make much sense of it. I've read several answers about convergence ... and I do have a manual convergence feature. Any idea on something I can try myself? I recently had the power distribution board replaced.

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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.

Posted on Sep 07, 2006

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Posted on Jan 02, 2017

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I have a green and red shadow on the words. It appears towards the top and bottom of the screen.


Hello,

It's a convergence issue. Go into the main TV menu under video settings and look for convergence. If it has an auto convergence select that and wait a minute the TV will adjust itself and give you a clear picture.
If the TV does not have an auto convergence and just regular convergence than select this. It will give you a grid pattern on your TV and you have to move the cursor (using TV remote) and adjust each "point" so that each line is perfectly white. If you notice red or blue anywhere on that "line" then you have to adjust using the up, down, left and right arrow keys to "line up the red and blue lines with the nearest white line. It takes time and patience to do, but when completed, all lines on the grid pattern should be pure white and you will have a great looking picture.
You have to do this will all TV inputs (Video1, Video2 and so on) the reason Zoom looks good, is because you never used that screen as much and so the lenses didn't have a chance to get out of synch.
RPTV's are made of the three lenses (red, Blue and Green) and as you watch TV, these lenses slowly get out of alignment. So you should do a convergence about twice a year to make sure nothing is out of whack.

You can pay somebody to do it, but may cost you like 100.00 or do it yourself, it is very easy just tedious and time consuming. If you have the auto convergence than your golden because this is the easiest way to "reset" the TV.

Since it is 4-5 years old it's a 50-50 chance that the TV has the auto feature. Good luck and if you still have the owners manual, I would read up on the convergence section in the manual.


Take in solving the problem.....

Jan 12, 2011 | Philips Magnavox 51MP392H Rear Projection...

2 Answers

My Canon Rebel will not autofocus. It takes pictures just fine with manual focus. I see several posts about this and no solutions other than the user doesn't know how to take a picture. We've had the...


A few suggest about this problem. First in manual or auto focus mode does the green in focus confirmation light come on in the lower right corner of the viewfinder? Are you shooting in One Shot-AF, have you selected an Auto Focus Point are your pictures in focus? I know you've been using this camera for 2 years and these questions you need to ask yourself. If that green confirmation light comes on then the picture will be in focus. a few things that will mess up focus are little or no contrast. No contrast like huge expanses of water, sky, glass or infinity will render a auto focus system near useless. Something that is good is that you haven't said anything about error codes which is good. These questions my sound lame but ask yourself this when was the last time I cleaned the lens (Front Element) use a lens cloth for this and huff on it if a little moisture is needed. Do you change lenses often and when was the last time you checked your sensor for dirt? If you have had the lens off you should check the rear lens element for finger prints or oil. A dirty rear lens element will cause everything to look as if it's shot in a dream world. Check your camera sensor buy taking a (manual) focus shot of a piece of clear blue sky download it to the computer increase the size to 100% and check out the blue for dirt. A camera that's two years old and used "normally" may need the sensor cleaned. But go back to this infocus light if it's coming on and the pictures are out of focus then you have another problem as in dirt.
Hope this was a little insight into your problem

Jan 11, 2011 | Canon EOS Rebel XSi Digital Camera

1 Answer

I think that it is the green because i did what you said and it is still there. there is a feature on my tv called magic focus it brings up the colors and the blue and the red are very focused but the...


This tv is a DLP projection tv right?Magic focus button push don't solved the focus picture problems,have colors shadows or 3D pictures problems?The tv have a problems known as a convergence problems,it dead.The tv convergence board.Must have it 2 STK convergence ICS and some or all it resistors to be replaced to solved the tv picture convergence problems.The shop,will cost u $300-$350 for parts and labors.

Oct 02, 2010 | Televison & Video

1 Answer

Tv out of foucs


These procedures are from the owners manual, go into menu and then picture quality and then: Convergence The Convergence feature lets you adjust the TV’s three tubes. When the TV tubes’ images are precisely aligned, they create the color images you see on the screen. Over time, the picture can drift out of alignment (this is normal). If your picture seems fuzzy or has a yellow tint, using Convergence could correct this misalignment. Only one convergence is needed for all inputs, regardless of the signal format. Note: Make sure the TV has been on for at least 30 minutes (TV needs to warm up for best results) before starting Auto Converge or Red/Blue Centering. When you select the Convergence feature, a submenu appears with three options: Auto Converge Automatically aligns the projection lenses to self-correct color images. You’ll see flashing squares of color dance across the screen (this is normal). Note: After performing auto convergence, use the Blue Centering and Red Centering menus to fine tune convergence in the center of the screen, if necessary. Blue Centering Aligns the blue and green images to fine-tune the picture. Red Centering Aligns the red and green images to fine-tune the picture. Note: The ability to change channels is disabled when adjusting the convergence options. The TV must be tuned to a usable signal to converge the picture.

Apr 23, 2010 | RCA HD52W58 52" TV

2 Answers

Toshiba 57h81 green will not focus


Typically this is a convergence problem and can be repair relatively easy. Refer to this video to determine if you truly have a convergence problem. Also make sure you use your TV's original remote to make this adjustment.

Nov 15, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Red and blue shadows


Did you ever get the solution to this? I'm having the same problem on my 65 incher.

Sep 15, 2008 | Televison & Video

1 Answer

Hitachi 61SDX picture got dim shows Code 3


use the advanced options page and reset the factor blue and red convergence defaults then do re apply the auto color defaults color at first it seemed very red (which is good because red was the missing factor in the green picture) but after reseting all the color and tints to the normal ranges I then reset the color auto correct again and all seems fine.

Nov 17, 2007 | Hitachi 61SDX01B 61" Rear Projection...

1 Answer

Blue and yellow shadows


Needs convergence IC's replaced = part # STK392-110 upgrade
sub use STK394-160E. Replace both for reliability,then activate
auto-focus................................T.

Nov 08, 2007 | Toshiba 57H82 57" Rear Projection...

1 Answer

Pictue is dark as hell


use the advanced options page and reset the factor blue and red convergence defaults then do re apply the auto color defaults color at first it seemed very red (which is good because red was the missing factor in the green picture) but after reseting all the color and tints to the normal ranges I then reset the color auto correct again and all seems fine.

Oct 27, 2007 | Hitachi 65F59 65" HDTV

1 Answer

Jvc av56wp74 blue shadow


my suggestion would be...to replace the focus block..john

Aug 10, 2007 | JVC AV-56WP74 56" Rear Projection...

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