Question about Samsung HC-R4755W 47" HDTV

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RCA model P60820BL picture changes to bow tie shape

Colors and shapes become mixed. Turn it off and then right back on and it works fine for awhile. What is the problem? The TV is 10 years old so is it worth fixing? Will I be able to fix it myself or do you recommend a technician?

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Just click below for convergence repair kit;

http://servicemanuals.vstore.ca/

Double images and colors are blurry .Blue,red and yellow wave coming up from the bottom of the screen on the lower left and fuzzy images this is a symptom is for busted convergence IC,you must replaced this IC in order that will works better again.STK 392-xxx ICs and it's associated resistor,this resistor automatically change value,can caused truoble even though you change the ICs.If you bring this to a service center they cost you $600 to $700,but if you buy the repair kit you can save more,don't wory it is very easy because there is intallation guide including in the repair kit. Feel free to ask whatever the result... click the link for sample picture guide step by step installation;

Hope this may help;

Regards,
VOTIT

Posted on Jan 29, 2009

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Av48wp30 picture is not working. crazy lines all through it with no picture or bowing in an hourglass shape. Could turn off and turn back on after a few minutes but now will not come back.


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com

Common Problem #1) Convergence has gone out

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 projection 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 pics of convergence problems.


7859b01.jpg

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69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common 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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69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 21, 2011 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Color is off with double image?


Is the image bow-tie shaped, with red, green or blue fringing effects? If so, one of your convergence amplifiers has gone bad. (Bow-tie: at least one of the three primary colors in the picture goes out to the corners, but the top, bottom and sides are bowed in at the center.)

If it is simple color fringing, with no color grossly misplaced, something has messed up the convergence. This may be caused by a strong magnet near the set (for example, a poorly shielded audio speaker), moving the set so its orientation in the geomagnetic field is altered or its components mechanically shifted (rough handling).

If a convergence amplifier is bad, replace it before doing anything else. If you just have minor fringing, see your owner's manual for instructions on using the remote control to adjust convergence. If it isn't in the owner's manual, you'll need the service manual. Caution: if you try to adjust convergence with a failed convergence amplifier, not only will it not help, but you will have a lot of extra work trying to get it back to normal after you replace the amplifier. Try a small adjustment along one edge of the picture. If one or more of the selected color dots in the convergence pattern won't move, and you are sure you are following adjustment directions, stop immediately and proceed with hardware repair.

Convergence amplifiers are usually marked STK392-nnn where nnn is a specific variant number. Two are used; I usually change both because quite a few people have changed one and had the other die not long afterwards. Sometimes there is a fuse in the power feed to these modules that is also blown. If you change the fuse without replacing the amplifiers, you'll probably waste a new fuse.

Oct 06, 2010 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

A red blue and green line jus appeared across the screen of my 55 inch rca floor model big screen. instantly my picture and color become distorted


conversions are out....rca ... check for bad connections on circuit board around fryback xformer. check fuse by flyback xformer...fuse is shaped like a little plastic rectangle>>fuses should measure a SHORT when GOOD! Flyback Transformer is large in size and sends highvoltage to 3 picture tubes via a SPLITTER . easy to locate

May 19, 2010 | RCA R52WH73 Projection Television

1 Answer

OLD Hitachi 50EX13K rear projection TV now has bow shaped picture


Your convergence ic's have to be replaced along with checking all the bias resistors for exact value. Easy for me! I don't know what your electronics background is?

Oct 30, 2009 | Hitachi Televison & Video

3 Answers

Rca d52w23 has distorted picture. it is shaped


Go to menu then setup look for convergence if not on menu you have a blowed fuse FL231 will be next to FBT flyback transfomer on right side there is 3 in a roll small brown looking caps but they are fuses it will be the one in the middle.You can take a pair of plyers to pull off top they are all removeable and just snap back on.

Sep 15, 2009 | RCA D52W23 52" HDTV CRT TV

1 Answer

Picture is blurry and is shaped like a bow tie on my tv


This is a convergence problem that you can fix if you can solder. Let me know if you wish to attempt the repair and I'll post additional details and instructions.

Dan

Oct 10, 2008 | Mitsubishi VS-55707 TV

1 Answer

RCA 32V432T picture problem


Sounds like the Filter Cap is shorting.

Sep 08, 2007 | Televison & Video

1 Answer

Tv picture shaped like hour glass


The link you posted has been deleted, so I cannot see the picture you posted. If the sides bow in like an hourglass and the red, green and blue colors are still aligned then there is a horizontal width or pincussion problem, but if the sides bow in and the 3 colors have separated and are no longer anywhere near aligned then you have a convergence problem, both of which should be serviced by someone with experience in servicing projection TV's.

Jul 03, 2007 | Akai PT4298HD Rear Projection Television

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