Question about Panasonic PT-47WX49 47" Rear Projection Television

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Crts not aligned

I am getting ready to replace my convergance circut. once I do, is it hard to realign the crt's? because I thought that I could undo the wing nut and move them a little to fix problem. So no I am sure that they are out of wack just a little.

Jim

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The only thing this should affect is the focus. After repairing the convergence go to a screen where you can see the red, green and blue seperately and adjust the lens.

Posted on May 26, 2009

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I replaced the lens fluids on a Philips Magnavox 55PW936317F. I might have bumped the magnetic rings on the end of the CRT tubes out of alignment. Now the blue is way off and I can't seem to fix the...


The rings are what center the projected image. Locate the exact center of your screen then cover the other two lenses and then you can adjust the rings to get as close to center as possible, then you should be able to complete the convergence alignment when the other two CRTs are uncovered.

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Lack of cool tones,seems to have pink tint where itshould be white? just got this tv from a friend today,trying to figure out best way to correct picture


Check the CRT fluid in the blue and green CRTs. It should be clear. These sets have problems with the fluid getting cloudy and hence letting less light through. It also gives it a dull picture look. If the fluid is cloudy, you will have to remove the CRT and replace the fluid. Then re-align the CRT via the convergence in the service menu.

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Color adjustment


it is the convergance IC's check low value resistors in circut. always use heat sink compound.after installing ic,may need to get to factory menu to further adjust convergance.

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I got a 50'' Toshiba projection TV and when i


replace both stk392-110 convergence ics.the crts could be weak if you have no brightness.if the picture is dim the crts are bad.but the movement of the convergence are bad stk392-110 ics.some models they are very difficult to
change.you may contact me at 972-579-0527 if you are in the dallas/ft.worth metroplex.

Jul 15, 2009 | Televison & Video

1 Answer

Philips 55PW9363 need convergence grid dimensions


You may not need a template as long as the geometry has not been totally lost or corrupted. How is the image in red and blue? If any of the three convergence/CRTs has good geometry, you can align the others to it. You can simply cover over any CRT whose image you wish to block out while you are aligning the others.

Feb 15, 2009 | Philips 55PW9363 55" Rear Projection...

1 Answer

Lines on TV Screen


Depends on the TV model, if this is a rear projection TV with CRT lamps, that means that either CRTs are not aligned (fault on convergence board) or one or more CRTs had blown.

Jan 02, 2009 | Televison & Video

1 Answer

Phillips 60in projection,rred/greenish 3d effect


the two resistors were likely burnt out with a convergence IC (chip). these are usually a stk392-120 on a philips, or simmilar. the alignments can be very tedious and difficult. what needs to be done is replace the ICs that control the colors that are mis-aligned. you might see that the green is square and straight, but the red or blue is off. in most cases, i would just change both convergence ICs plus the bad resistors. then go to your full re-alignment of convergence to fix the picture. hopefully the previous owner didn't mess anything up too much (if they changed anything on the CRTs ie yokes, lens focus, centering magnets it could counteract your electronic adjusments). before you put too much time into it, look to see that all 3 colors are atleast focused and it appears that the CRTs have been left untouched. once you get circuit repaired, you will probably want a service manual to help with alignment. this complexity may bring you to want to just pay for this repair, could run you anywhere from $200-400 depending on severity and local rates.

Dec 07, 2008 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Problem with convergence


you dont need new CRTs (tubes) you need either the convergence Board or the convergence power supply board depending on the symptoms. If its only one color that is out of alignment its most likely the convergence board. If all the colors are out of alignment you need the convergence power supply board. you can get whichever one you need at the following link as they have both of those circuit boards and have free shipping. Heres the link,
http://servicemanuals.vstore.ca/

Jun 22, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

2 Answers

Blury picture, convergance problem


What you're describing is probably contaminated coolant in the crts. Between the outer part of the crt and the lens is a chamber filled with a coolant (ethyl-glycol) which can become contaminated and cause blurred picture. I'd strongly recommend taking this to a shop the procedure for changing these is a bit beyond the layman level.
Remove Crt assembly. Mark the Crt lens position for accurate reasssembly.
Mark the centering ring's postions to make easier realignment and carefully remove lens assembly by removing the four torx screws. Keep Crt assembly vertical so you won't leak the fluid...
Remove the inner lens by carefully prying up on the edge of it.
Dump out the fluid in the sink and wash the face of the Crt and chamber with water to remove all the fungus and crud. Flush the chamber with isopropyl alcohol to kill all the fungus and dry thoroughly.
Reassemble inner lens and outer lens and tighten all four torx screws.
Remove side filler plug and fill chamber with approved new Crt coolant, reinstall and converge.
Repeat this procedure for the other two Crts. It will need this done whether it looks clear or not !! The green and blue Crts in this unit are prone to this failure.
Hope this helps
Bill

Nov 14, 2007 | Philips Magnavox 51MP392H Rear Projection...

2 Answers

How to realign the picture tubes


You should NOT need to re-align the crts to correct this problem... Chances are the failure is in your convergence circuit and most likely the convergence amps, (IZ103 & IZ104)Samsung p/n#AA62-30173D which may be substituted to an original STK394-250 and you'll need two of those. (Make sure they're not cheap knock-offs).. You may also want to test the resistors feeding those amps for change in value. And if I've lost you with any of this take the set to a qualified tech for the reapir - - you'll be money ahead... Under no circumstances should you need to change or alter the CRT placement. Chances are better for you winning the lotto three times in a row than it being a placement problem...

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