Question about Toshiba 57HX83 57" Rear Projection HDTV-Ready Television

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Focus I've noticed that the picture is out of focus on most of the right half of the screen. Is this easily adjustable?

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Re: focus

Theire is 2 things could be wrong
1 cotaminated coolant in the crts this isnt something you can repair yourself and would need a proffesional to do this.
the other problem could be a convergence problem have ytried adjusting all the setting on your control if this dont solve problem then you probably need to get the convergence amps replaced this is also difficult to do your self as you would have to spend about 1000 pound uk on the right equipment to test not just the amps but any resistors that could be on way out or gone as this could lead to the convergance problem both these jobs are best left to a profesional sorry couldnt offer anymore help but their isnt much you can do yourself without spending a fortune on the righ equipment.
You would also need to be able to understand spec sheets and follow circuit diagrammes to trace any problems let me know what you want to do.
I can tell you where to get the spec sheet from ok and info on the parts you will need to replace but you will need to test resistors and ic to be sure on what you need to replace

Posted on Nov 29, 2007

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When the screen is dark there are lines that run back and forth across the screen which is only noticable when pitcure is dark immage.

the screen bias needs to be turned down-ehind the front cover which is behind the grille there is a small black square about 3 inch square 6 little knobs sticking out 3 say in small letters screen and 3 say focus, don't adjust the focus just the screen for the coresponding color that shows up when picture is way to do this is darken the room and put it on video input with no signal if lines are white slowly
adjust 1 color after the other counterclockwise untill
lines disappear if only 1 color shows then only adjust the knob with the matching color. this is a very fine adjustment, to much will make your auto focus stop working. check it after you are done

Jun 20, 2010 | Sony KP-51HW40 51" Rear Projection...

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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

Red horizontal curvy lines

You need to turn the voltage on the red tube down slightly, also you would need to adjust focus to compensate for the lower voltage to the red tube. On the left and right bottom side of speaker cover are two round covers, take them out and there are 2 1/4" hex screws take them out carefully take cover off, there is another service cover same hex screws remove. You will see the focus block on the right side, tubes are labled on block. 2 knobs for each tube. Make voltage adjustments while tv is on a black screen, then for focus, turn color all the way off in the menu, and adjust focus until it looks right in black and white. These adjustments should only be very small; if alot of adjustment is needed, you may have other issues.

May 29, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Picture is distorted from center on my 65" Sony projection TV.

hi. this will be an easy fix for you if you are a good solder. you will need to replace the convergence chip that is located on the PC board(main). this chip is damaged and it has failed due to this damage that has occurred. click below for your new convergence chip(stk).


May 21, 2009 | Sony Grand WEGA KDP-65WS550 65" Rear...

1 Answer

One half of picture is distorted

to create the total geometry in the tv is needed a system called Convergence.Convergence amplifiers are damaged in this unit, magic focus cannot work because magic focus works to level computer and controls the amplifiers damaged. this repair is for a technician because an adjustment is needed after the amplifier's replacement.

Oct 09, 2008 | Hitachi 61SBX59B 61" Rear Projection...

1 Answer

RCA P46921. Just changed flyback.

First, this assumes nothing else is going on to cause it. Here's what I did. Go to the 'green grid' via the v76 menu and go through the alignment there. Notice that there are red letters, blue letters, and a green grid. While you are in this screen, adjust the red, green, and blue focus watching the individual color's item until they are in focus. If they won't focus here, they won't focus and you have something else wrong (what I do not know). Then, return to normal programming, then select menu on the remote, then screen, then adjust projection tv convergence both horizontal and vertical crosshare. That ought to get it.

Mar 16, 2008 | RCA P46921 46" Rear Projection Television

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Thin red horizontal lines across screen

replace the focus block or try to adjust the screen control on the focus block for red only. this will affect the white balance of the set so adjust it carefully. the focus block is located on the front inside the set. remove the speaker cover then the 4 screws on the front plate. the focus block is 3" x 2" black box with 6 adjustment posts three for focus and three for screen. adjust only the affected screen (R).

Mar 13, 2008 | Sony Grand WEGA KDP-57XBR2 57" Rear...

1 Answer

Green picture

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

Blurry picture

adjust the flyback focus of your tv
just look at the flyback and you can see there the focus and the adjusting for the screen.

thats only what i know at least maybe it can help =).

Sep 23, 2007 | Toshiba 57H83 57" Rear Projection HDTV

1 Answer

New PCB SUB - But blurry and color off.

have you tried to also adjust the lenses to fine tune the focus .

Aug 28, 2007 | Samsung HCL4715W 47" Rear Projection...

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