Question about Samsung PCL541R 54" Rear Projection Television

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Sanyo tv. HELP: Wehave a red screen on black picture, need to know gray scale adj. couldn't find.

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Have this listed as a Sanyo but under a Samsung repair heading, But the way to quickly gray scale a set remains the same, First we have to find the screen / Focus controls for the set, allmost all the time they will be behind the speaker grill behind a protective cover and have six controls, one set for focus and the other for screen, Usaly this control box is about the size of a pack of cigaretts. Now get the set to display a black pix, usaly going to a input that has no signal will do this, next turn the screen clock wise till the retrace lines and color shows up then turn it back (counter clockwise till all color disapears, do this for all three and thats the basic Grayscale for the set

Posted on Feb 14, 2008

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Fixing the picture in my Philips rear projection tv


As far as mostly red--turn color to zero and examine screen--if not gray or black and white it may need the screen controls adjusted.

Dark---with back cover off clean the three lens this model has--they are the light source for your picture and if dusty picture will be darker and somewhat dull looking.

Answer is based on brand/model number listed here.

May 16, 2012 | Philips 50P8341 50" Rear Projection...

1 Answer

My hitachi 53udx10b was supposedly just serviced but the picture is extremely blue. Have tried adjusting picture to no avail. Help.


I am going to tell you a simple thing to do to know what your problem may be.

With the set on turn the color all the way to zero. Go to a channel if you can that is in black and white. What color is the screen?

If the answer is that it is blue in the background whoever serviced the set did not and could have removed front speaker grill and inspection plate behind it; there is a black plastic block with three screen controls (red,green,blue) and 3 focus controls (do not touch the focus ones.)

I suspect if the blue screen is there a slight adjustment of the blue screen down will correct this.

The picture with the color at zero should be black and white or gray. If blue is background color it will also be with color.

This is called gray scale; picture with color off has to be gray or black and white.

Before you rate this solution if you have questions make a comment right here and I will advise you.

SD TECH

Jun 29, 2011 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

I tried to adjust the color on the back, then the picture went black. Now I can't get any picture back. What should I do?


Put the screen controls back as close to there original position then unplug the set for 5 minutes. Those are sensitive adjustments for excessive beam current the set will shut down and the micro will latch up. Like I said, unplug then try again. You may have to do this a couple of times. The closest way to adjust them without a dvm is having the set in aux mode, turn r-g-b screen controls counter clockwise, look into the red crt and raise the red control until red is just visible then repeat for the other two. If your gray scale is off such as to much of any one color, turn that one down just a little. The last part I just stated is with a picture on the screen. Your picture should be black and white with no color added. (turn the color down via remote control)

Nov 27, 2010 | Philips 50P8341 50" Rear Projection...

1 Answer

Red arching lines showing up on screen promident when a dark background is present


Red picture tube needs screen voltage adjust. Open fornt or back of TV and look for a black square looking box with adjustment knobs. Look for red screen adj and slowly turn rt or lft until lines just disappear. If screen goes too bright tv will shut down, just turn back on again and retry

Dec 04, 2009 | Sony Projection Televisions

1 Answer

Adjust color, need service manual


On controlls the foucus...the other the brightness. I would not mess with them. 99% of the time the problems is one of the two listed below...

You have one of two problems. Sometimes both.

Problem #1) 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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2c07611.pngSolution #1


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.

Problem #2)

Your TV may have a convergence failure. ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem




  • 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.
Here are some photos of convergence problems.

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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

0667c5f.pngSolution # 2

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Jun 05, 2009 | Philips 9P5544C 55" Rear Projection...

1 Answer

Projection tv 42" panosonic hdtv. to much green in the picture. Jeff


this unit may have a resistor on the green crt-board that has increased in value. check ohms(resistance) on all crt boards and compare to one another. these will have color bands that inicate value of resistance. you do not need to know color code, just match colors of resistors on each board then measure. you could also have weak green tube. turning down the master screen control located on the fous/screen block can reduce grn. drive. to adjust proper drive for each so the grey scale is correct, turn color to tv all the way down then adjust screen controls on block for black & white picture. when color is turned all the way down, you should not have any green, red, or blue over cast on screen. mch

Feb 20, 2009 | Panasonic PT-51G35 51" Rear Projection...

1 Answer

Color adjust


Greetings!

Adjusting the picture tubes is a scary proposition, but since you have already done it...
The easiest way to balance the gray scale is to turn the color all the way down on the set. The next part is easier with two people if the screen controls are on the back of the set. This is the part you saw that has six small knobs on it. There are control for the focus of the red, gree and blue and for the screen level of the red, green and blue. You will want to adjust the screen controls in an effort to get the picture black and white (this is why you turn the color down), hence the term "gray scale". Just make slight adjustments, take your and be patient. It will take some time, but you will get your picture balanced back out in time.

Hope this helps!
Rob

Jan 15, 2009 | Philips 50P8341 50" Rear Projection...

1 Answer

My screen have some red lines


I will assume from you description that this is a rear projection crt(picture tube) tv. if this is true I have good news/bad news.
faint red horizontal bowed lines in the picture indicate the screen(G2) voltage for the red tube is too high.Slight lowering of the G2 adjustment will eliminate these lines. I stress SLIGHT because too much adjustment will mess up the gray scale .
The bad news the red crt made be bad. if the adjustment works but in the future the problem reappears then suspect the red crt.red crt replacement is probably not economical to repair.

Jun 09, 2008 | Mitsubishi WD-52525 52" Rear Projection...

4 Answers

Picture has a green shade


Sounds like your red picture tube is not emitting enough brightness to balance the colors. A temporary solution could be to slightly increase the screen voltage of the red CRT to give a good black and white picture when the color control is turned all the way down. If the set has not been serviced in the last 5 years or so, and you're not ready for a new HDTV set, it may be worthwhile to get a technican to look at it and clean the dust off the lenses and mirror and evaluate whether a picture tube rejuvination might work along with the gray scale tracking adjustments.

Mar 10, 2007 | Toshiba 51H84 51" Rear Projection...

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