Question about Samsung HCN653W 65" Rear Projection Television

4 Answers

Shades of red

Problem with red color being out of focus.tried to adjust by hand but still blurry.65 in samsung 5 years old.happend all of a sudden.how can i fix this. adrian.gogan@yahoo.com

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  • adriangogan Oct 21, 2008

    red color seems off to the right.when going to convergance on menu, cannot adjust.maybe circuit for red color.??

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4 Answers

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Sorry ,but this is your conversion IC or IC's that are failing , they cotrol the horizontal , vertical and color alignment. if you know how to do it yourself then just look at your STK IC(big chips on a heat sink)and get #'s after the STK
otherwise it costs $300-$400 for a tech to come out
you should be able to check out your STK specs. here http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm

Posted on Oct 21, 2008

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Hi,

Based on your post, no amount of alignment menu adjustment would correct the problem, then it is possible that there is a faulty component. most likely the convergence amplifier board Part Number: BP95-00142P. Alternately, you can try component level and simply replace the large ICs, check replace capacitors/resistors. Both of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope that this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Oct 21, 2008

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Since your tv is old, the blur problem is probably caused by old coolant in one or more of the CRT lens couplers. Hopefully, the lenses are simply out of alignment, but no one has ever worked on the tv, then this is unlikely.


First, unscrew the back panel of the tv console (should be a bunch of 1/4" hex head screws). There will then be a large white panel at a 45 degree angle held in place by two tabs or maybe even screws. Remove it to see the CRTs. A quick check for the blurry problem is to look directly into the CRTs while the tv is off. DO NOT do it while they are on if you can help it, as it is not good for your eyes.
Shine a white LED flashlight down into each of the CRT's top lenses. Avoid classic incandescent light in this case, since you will be looking for the difference between white and yellow. I you see a white plate inside, good. If the inside looks yellow, and has floating things in it, then the coolant fluid inside is old and bad. You can replace this, but it is a VERY delicate task and MUST be done in certain steps to avoid ruining the electronic boards anywhere within splash zone or drip reach of the lens couplers. The coolant is a special blend available at most tv repair shops, but it's basically clear antifreeze (which you wont likely find in an automotive store).

For the color being off, it is most likely the gain on each CRT being out of whack. First, change all of the user settings (in the on screen menu) for image, color, sharpness, etc to the middle or default.
With the back panel off, somewhere near the bottom of the inside there will be a small black plastic box with wires coming out the sides. This box should have 6 knobs on the front of it (the face facing the rear of the tv); 2 rows of red, green, and blue knobs. These are the screen controls for FOCUS and GAIN. And they should already have some sort of label telling you so.
I placed a mirror in front of my tv so I could see the screen as I adjusted, but you might be able to see it somewhat by hanging a sheet over the front of the screen and looking at it from the inside.
There's a much more in depth method to do this that is described in the service manual (which you are likely to have seen by now; they are usually either stapled to the back of the tv or hanging somewhere inside and easy to see)
But basically, just turn the knobs gently around until the picture looks about right to you. (Remember, if you turn them all up super bright, the CRT will not last very long. Try to keep the knobs near the middle of their turn ability)


If you want to do a full out overhaul of the screen, you'll have to make a lot of adjustments with a bunch of little knobs (variable resistors, really) on the computer board inside. The service manual will tell you what each one corresponds to, but most of them will have a subtle label on the board.

Posted on Oct 20, 2008

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Hello,

Thats need an over all cleaning in the circuit and resoldered all loss components and this will fixed the problems.

melnAVZ

Posted on Oct 20, 2008

  • Emelio Navaja
    Emelio Navaja Oct 21, 2008

    REd color is probably the shorted part ..and sometimes low voltage regulated....consult repairman in your area.

    melnavz


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The tv has 2 focus adjustments for each tube, mechanical and electrical.

1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.

Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.

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When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.

2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.

In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.

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You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.

If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.

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easyab

http://calgaryconvergencerepair.weebly.com/convergence-ics.html


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Hello HelpMe3333,
Your one and only problem is a bad convergence Amp board. Changing it will fix your set. You can contact http://www.interactiverepair.com for step by step assistant with installation of this board.
List price $100
Part Number: BP95-00142P
758d694.jpg
Best regards
circuitcity

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if the red line is blurry and you have adjusted the screen focus control and does not work then you prob have a bad red CRT or bad red CRT fluid.........

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