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It's an older model. The blue & green are out

It's an older model. The blue & green are out of focus.

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This is usually not a focus problem but a convergence problem. It can also be caused from dust build up on the mirror behind the projection screen or the projection tube lenses are dirty. They should be cleaned about once a year. Unless you are a skilled technician do not attempt to do this your self as there is about 30,000 volts on the hi voltage anode on each tube. Get a technician to do it. The initial cost might be higher but believe me if you try it and damage a component it could more than double the cost.

Posted on Oct 08, 2009

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glad you posted what colors you do have , cause 2 resources didn't match ,actually 3 , i did find a match to your colors was a 97 year model premium radio, so we have a match .....

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Oct 23, 2015 | Ford Cars & Trucks

1 Answer

My Model TV # is 51swx20B. Two days ago the picture started having a lot of green in it and no blue. What is the repair needed.


Do adjustments on focus block. Will have to open front panel access door, focus block blue will be on left, green will be on top. Top screen bottom focus. Turn clockwise to increase, counter clockwise to decrease brightness. Turn the color all the way down on menu where it's pure black and white and make adjustments for perfect black and white picture, then when you adjust color, it will be perfect.

Aug 09, 2011 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Just the blue on my rca projection tv is blurred. on the auto convergeance it says it cant read the sensor. on manual the cross hairs for the blue are oversized and blurred. i tryed tuning in the focus but...


Have you try adjusting your focus/screen drive controls to Tube R/G/B you have a focus/screen drive control block to adjust each Tube 3 controls ontop 3under them top ones are for Focus bottom is for screen drive.Red/Green/Blue Tubes.You might need to replace convergence IC, what is your Model number printed on back of TV?

Mar 24, 2010 | Televison & Video

1 Answer

Blue outlines on screen. not a screen burn or convergence problem


I am not familiar with that particular model but most are similar.
It may need the blue focus adjusted. Most tv's have some type of automatic focus. If the blue is out of focus it can "bloom" beyond the red and green. There should be a focus block with 6 adjustments (2 rows of 3) behind the speaker cover. I wouldn't mess with the one labeled screen or block. Adjust very carefully. They are usually in the order Red-Green-Blue with the focus on the bottom row.

Mar 02, 2010 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Hitachi 53UWX10BA dynamic convergence works but blue is blurry


I know this set very well---you are saying convergence adjusts ok everywhere? If you understand that the blue is usually de-focused a little----there are only two ways to adjust the focus of each tube-----

1.) Behind the front speaker grill there is an inspection plate---with it removed you will see a small black plastic block with 6 controls on it; it is the MASTER SCREEN/ FOCUS BLOCK

2.) THREE of the controls left to right are Screen controls(red, green and blue) and the other 3 are FOCUS--IT IS ALL black and you need to look close to identify which is focus and which is screen---you are looking for the BLUE focus control(one of the 6)

3.) With the convergence grid on screen cover the RED and GREEN lens in the set and try to adjust the focus of the blue(I presume you know how to put the set into the Convergence mode?

4.) The only other way to adjust the Blue focus is from the back of the set---with the Red and Green lens covered up place a blanket over the top of the set that covers the whole screen--from the back of the set you will note that all three of the black focal lens have a wing nut---with the convergence grid up and only blue lines present(Green and Red lens covered with a cloth) look from behind the set at the grid---loosen the wing nut on the blue lens and slowly slide the lens left or right until the blue has the best focus possible----if it will not adjust with the focal lens or the front focus control you have a circuit problem.

I do this here for free and if this information helps you take a minute and give me a vote here. If you have any questions or need advice reply to this posting here and I will assist you.

SD TECH

Sep 14, 2009 | Hitachi 53UWX10B 53" Rear Projection...

2 Answers

AKAI PT5598HD - I HAVE REPLACED THE CONVERGENCE BOARD AND PICTURE AND SOUND ARE "ON" BUT "PERFECT FOCUS" WILL NOT BRING BLUE INTO FOCUS. "PF" STOPS AT 37% - RED AND GREEN PATTERS ARE SHARP BUT BLUE IS...


Most of these sets have a SCREEN/FOCUS block---usually all black with 6 controls----you need to look close at it as one row of 3 will be screen controls---don't touch those----the other 3 will be FOCUS- MARKED in little letters will be r,g,b(red,green blue). TWO ways to adjust the focus: 1. carefully locate the blue focus control and adjust to see if blue will improve in focus. 2. each of the 3 large lens where the picture comes out have a wing nut and a slot--you can loosen the nut and turn the lens---usually best focus that way is if the part that turns is in the middle of the available area to move it.

I should point out that all projection sets intentionally de focus the blue--the lines if blue should be clear but never as perfect as green or red--this is normal.

I do this here for free so if this has been helpful give me a vote here.

if you need direct help:
etower.766@netzero.net

Aug 20, 2009 | Akai PT5598HD 55" Rear Projection...

1 Answer

Green & Blue Ghosting Convergance problem


Odds are real good that the cooling fluid in the green and blue picture tube assemblies has become contaminated. You can tell by looking down into the lenses with a flash light. Funny thing is the red never gets contaminated because whatever organism is causing the problem can't survive in red light. BTW this may still not solve all of your convergence problems but when the colors are so badly diffused the convergence sensors for flash focus can't lock onto the beam landing.

Jun 01, 2009 | Samsung HCL473W 47" 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...

2 Answers

Blue screen of death on a tv??


this could be three differnt things

1. the crt itself could be bad

2.the vertical ic on the crt board

3. the focus pack or focus block

Sep 19, 2007 | Sony KP-53V45 53" Rear Projection...

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