Question about Toshiba 42H81 42" Rear Projection Television

1 Answer

Still green the picture looks good but turns green, found six adjustment screws in the front , adjusted the focus and adjust the color apptitude. try the the touch focus said touch focus error .

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  • Anonymous Dec 26, 2007

    My screen is green and almost totally disappears. I have tried the tint. colors and to no avail. I tried the Focus button but it did not help. What can I do?

  • Anonymous Dec 26, 2007

    What is the IC? How do I fix this?

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  • 4,402 Answers

Go In service convergence mode and try to adjust red and green if you cant then it's convergance amp ic's
if you can adjust them so they align up try doing a touch fous after that,.

Posted on Dec 19, 2007

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Hey everyone. I have a Hitachi Rear projection Tv 53udx10b. I just replaced the convergence chips and cleaned all 3 CRT tubes. The picture definitely looks clearer now but the white tint has a slight...


You can try adjusting the color output. There are two ways to do this:
1) In the service menu (I don't know the codes or parameters...) I will not cover this for lack of info.

2) Via the focus block (Very touchy and difficult to get the mix right again if you get too far off)

If you take off the front cover there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need more red in the mix or just less blue and green. There is a screw for each color. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Barely turn the red up.
Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn andy of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Televison & Video

1 Answer

Red Lines through picture when screen is dark, back ground has a red tint. On my 48 "Sony Rear Projection" TV


You can try adjusting the Red color output. (Very touchy adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need less red in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Go to an unused input where the screen should be dark. Barely turn the red down in a dark room so that the red spot is at the same level as the Blue and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Sony KP-48S75 48" Rear Projection...

1 Answer

Picture is very blue most times.This is a light blue, but makes viewing difficult. Also before this issue came about, you could see a faint set of arcing lines running across screen especially when screen...


You can try adjusting the Blue color output. (Very touchy and dangerous adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small rectangular black box with 6 screws on it. This is the focus block. (At least this is where most of them are located) If there is no front panel, It may be located on or near the flyback (High Voltage) transformer on your model accessible from the back instead.

It sounds like you may need less Blue in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.' They may have silicone over them to prevent them from moving. If so, you will need to remove it and put more on when adjustment is complete.

Go to an unused input where the screen should be dark. Barely turn the blue down in a dark room so that the Blue spot is at the same level as the Red and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur to the tubes. If you turn them up too much, the TV may detect a short and shut off. this is a normal fail safe. These only need VERY slight adjustments.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful. Once again - LETHAL HIGH VOLTAGES ARE PRESENT WHEN UNIT IS ON!!!!!!

Apr 19, 2010 | Sony KP-65WS500 65" Rear Projection...

1 Answer

I cant get the color right. its to red??? any help? i did notice with the back cover off, there are 6 adjustment screws


yes! those are the screen and focus adjustments. 3 for screen, 3 for focus. try this. go in menu....turn down color, brightness, contrast all they way down. you should then have no picture, but in your case a little red. then go to back of tv and turn those 3 screen adjustments all the way down. slowly turn the screens back up until you get barely a picture. because remember, your brightness and contrast is all the way down. the picture should be dim but seeable and with red, green, blue adjustments, make it a black and white picture. when balanced..... turn up color , brightness, contrast in menu. enjoy!

Nov 14, 2009 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Color lines out of focus


Best Solution posted on Apr 12, 2008 Asker's Rating 3%20stars_w.png
dc2eb76.jpg MikeNJ1964
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You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.
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MikeNJ1964 was exactly right! I have a Sony KP-65WV600 that had horizontal green lines that showed when the picture was darker. I had to remove 3 screws on the right and left side of the tv holding in the speakers...carefully pop out the middle panel from the clips holding it in....remove 4 screws from the cardboard in the middle and remove the cardboard. I then saw the six screws. The adjustment screws were the three below. I turned the middle screw until the lines dissapeared. I tried the left screw and blue lines appeared which I then adjusted away.
THANKS a bunch. SAVED me money!!!

May 15, 2009 | Sony KP-65WV600 65" Rear Projection...

1 Answer

Greenish tint to picture


there may be a green tube issue or there could be a screen voltage or screen control adjustment issue. There is a control block with six adjustment screw inside the front panel in front of tv. WARNING high voltage exsit in this set and adjusting these controls really should only be done by a tech,....So be careful

Nov 20, 2008 | RCA D52W19 52" Rear Projection Television

1 Answer

Panasonic pt53wx52f reply


No problem happy to help. This can get kind of complicated but I will try to walk you through it. Ok in your original post you said that you cleaned the lenses. There should be three of them these are the top of the tubes. One is the red one for blue and the green one is in the middle. they look like large cylinders. If I could see a picture of the unit when it is on it would be a lot easier. But the easiest way to get to the mechanical adjustment fort the tubes is through the front. Below the screen it should have a cloth front. This is a panel that is covering the tubes. remove this panel (there will be screws in the back and the panel should pop off.) This is the really tricky part below each tube there is a board that is attached to the tube. and above that board usually about three to six inches you should see three round circles with a kind of lip on each one these are the mechanical adjustments. Before you do anything to these we need to find the screen voltage adjustment box it is about 3inX3in usually black colored. and it will have six little knobs three on top and three on the bottom. These can be adjusted using a screw driver. One set of three will be labeled focus and the other screen. They should also have a label next to each knob saying the color B for blue G for green and R for red. It sounded like your green was off too much green maybe make small adjustment very small adjustments to the green focus and the green screen. Usually it is right for brighter left for dimmer if you adjust it to much the tube you are adjusting will go into overdrive and the whole tv will shut off. Adjust it until it looks better then depending on how it looks after you adjust the screen and focus will will have to play around with it it is a trail and error procedure. Then move on to the mechanical adjustment for the tubes the circle looking things. What i usually do is put it on a cross-hatch or some kind of picture that is stationary and has line s in it it makes it a lot easy than doing it on a moving picture. Use the title screen to a dvd movie or something like that. when you are looking at the tubes when the tv is on you will see the different colored tubes red, blue, and green once you have the green tube adjusted through the screen voltage box mentioned earlier to your liking then adjust the mechanical adjustments on the blue and red tubes use the lip on the circles to turn it left or right in small measures. you will see how each circle moves it in a different way. What you are trying to do is over lap the blue and red on top of the green. You will have to play around with this to find tune it it can be very difficult. Let me know if this helps if you still need help after you try this their is another route that could be used but it is hard to be absolutely sure without actually seeing the unit. Good luck

Oct 07, 2008 | Panasonic PT-53WX52 53" Rear Projection...

2 Answers

GREEN GHOST


If you want to adjust focus and screen there is a focus block some sets they can be found on the front behind the gril then behind a cut out held in place by screws if not check from the rear. But a ghost like you say sounds like a convergence problem

Mar 21, 2008 | Philips 9P6444C 64" Rear Projection...

1 Answer

Green picture


Hi,
I'm not sure about this model but most projection tv's have a focus/screen control block usually located behind the front grille where the speakers are. The grille usually comes off easily. If there are no circuit problems you can adjust the red green and blue picture tubes there. Also the focus. It will be written somewhere screen and focus: Three for screen and three for focus. If you find the screens then adjust them slowly clockwise for increase brightness on the red and blue and you may have to reduce the green. Adjust for best picture. If the picture does not adjust too good then the tubes are weak. Only if there are no circuit problems Hope this helps

Dec 30, 2007 | Mitsubishi WT-42313 42" Rear Projection...

1 Answer

Green


take the tub off of the back and there will be a red, blue , and green turn dials that adjust th focus and adjust the color apptitude adjust it accordingly

Dec 11, 2007 | Toshiba 42H81 42" Rear Projection...

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