Question about Samsung PCN5425R 54" Rear Projection Television

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Red picture tube broke at the yoke

Received this tv for free. worked for the first night next day the red was going on and off for a while, then on super red with  a curved picture when it poped and shut down. I said to myself I can fix this ,I went to school for this kind of stuff. Proceded to take back cover off and take look,  after i checked this site for clues I pulled the red plug with blue wires and tried to turn the set on. When I hit the button for the third time I almost soiled myself when  the neck of the picture tube fell. I also noticed what must be coolant had squirted out the breather hole and ran down the side onto the circut board below and looks like it may have done some damage. there is one small greenish-black spot size of a pea going under a capaciter and the board looks wet in that area.Why did this happen? One more thing,the tube part number is P16LFM00RFA(TU)  what is the diference of this # and that # with (AU), and what about using a tube from a green or blue  and change out the lens? (with matching #'s from blue or green).

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6 Suggested Answers

premtech
  • 934 Answers

SOURCE: Samsung Rear Projection HD tv IC convergence green only messed up now. Help please

To check the pico fuses you're merely testing for continuity. If you get an infinate reading you're in good shape - if it doesn't budge the meter the fuse is open... That's a really easy set to work on for convergence problems - the convergence board is easily removed..
Another cause for mis-alignment like that are the youke return resistors... There are several out front of the convergence amps that may have changed in value. They are 3.9 ohm - 2w resistors and will look identical to Rz123 and Rz124 (same banding). For those simply select a low ohm setting on the meter and check to see if any of them have some way low or way high reading...
Need anything else just ask...
Bill

Posted on Dec 10, 2007

SOURCE: SAMSUNG PICTURE FREEZE (LOOKS BLACK&WHITE)

got mine working better unplugged the sound and wiggled the plastic coated wire above the large fan works but freezes maybe once in a day some days never have the sound running through the receiver (surround) I shut it off and it comes back on when it does freeze figure loose connection

Posted on Jan 06, 2008

  • 163 Answers

SOURCE: RED OUT OF ALIGNMENT

Smack it on the back closest to the board (Not Hard)..to see if its a Cold sloder joint issue.. (Trust me I've seen issues).. Also Not familiar with the model is it Flat Plas, CRT, LCD?

Talk soon....

Posted on Feb 06, 2008

  • 98 Answers

SOURCE: Color issues

yes try this above links

please check out this links

for convergence board ics reparing it your self

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

and for convergence settings

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

thanks.

Posted on Oct 13, 2008

CAYPIANAN
  • 227 Answers

SOURCE: HCJ552W 55' samsung rear project....won't turn on

dear friend you have a power supply problem, get one of those cheap meters and open the set, look for a blown fuse, if they are ok wich i doubt, you have to call the repairman.

good luck


caypianan@yahoo.com

Posted on Oct 23, 2008

daniel719
  • 240 Answers

SOURCE: I have a samsung HCP4752W

theas units have a comen problem of the color weel failing, first check the lamp then the wheel and all fans.

Posted on Jan 11, 2009

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1 Answer

How do i fix a crooked screen on an older tube t.v.?


The yoke needs to be turned slightly and the picture will move in the same direction as you rotate the Yoke. (located on the neck of the Picture Tube) Just loosen the screw on the yokes clamp slightly then carefully touch only plastic edge of the yoke and turn it slightly while an assistance watches the picture be careful not to slide the yoke up hugher or lower on the neck. It has to saty at the same spot but just rotated slightly.The pic below shows the yoke with yellow arraows. Do not disturb the purity rings (RED ARROW) or it will cause blotches in the picture so its very important not to disturb the item with red arrow.
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This model series had a odd problem that caused this. It was the Hoizonal wire connctors for the yoke. If my memory serves me right, the Yoke wire harness went from Yoke to Yoke and plugged in at the casing of each yoke. What I found is the solder connection on the small board of each Yoke was intermitent. Please be careful if you choose to tackle this. It is in a HV Area.
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My screen fades to red, then the TV shuts off


It is your red picture tube that is your problem . This is common with Sony projection TV's of your age . You will need to replace the picture tube . If your going to do this yourself you should have some knowledge of replacing a picture tube as you need to align the yoke and purity rings and adjust the settings of the red tube. If not call around to some local shops not the big box stores to get the best price on labor and parts . Depending on the price of the tube expect anywhere between $350.00 to $500.00 to get fixed . There might be a remote chance of a loose connection on the red circuit board and this should drop the repair price $175.00 depending on there labor charge . Make sure your colors were very good before you had this problem. If not all three need to be replaced and this would be costly and cheaper to buy a new TV. So if a shop tells you to replace all three this is only done if your colors were weak and the picture was not as bright and clear . Good luck , Team tech

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Your HT Tansfer is giving low votage to the picture tube. Replace the HT Transformer(don't touch or go near it, it carries 11000 Volts!)....sodeep

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convergence issue - has the set sustained a knock?
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1 Answer

Need to fix the color and screen


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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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.

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1 Answer

No picture no power red button flashes 4-5 times and shuts off


Try unplugging the 3 convergence yoke plugs and then trying to power on the set. The convergence plugs are located on the board on the left side of the tv looking in from the back and they are 3 identical plugs right next to each other they have a R B and G next to the plugs one letter for each plug just remember which plug goes to which location when you plug them back in.

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1 Answer

Toshiba 50H81 manual convergence


are you sure it's yoke? these are know for bad convergence amp ic's
other wise it's a screw and glue holding the yoke in place loose the screw and try to break the glue with out breaking the plastic on the yoke, the other thing you can do is adjust the magnets which have tabs on the yoke. i would mark the position's of everything on the tube with a sharpie so you can get it back to start.

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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

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1 Answer

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2 Answers

Toshiba 57h82


your convergence amp ic's./if you want to cheat/align the other two colors and manualy move the green yoke rings on the green picture tube neck so the green cross aligns with the red and blue.,they shuold form white when all three are aligned,on top of each other.

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