Question about Hitachi 51F59 51" HDTV Projection Television

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Need to purchase a SCREEN FOCUS BLOCK. Where could I buy it.

Images fading fast. Cannot focus on anything. I need to replace the Screen Focus Block, but cannot obtain the part. Need help to locate replacement part.

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Hi, this will probably **** you off but here goes anyway, That part can be purchased from on line parts places but my advice to you is "leave it to a tv tech". The part will NOT come adjusted to your tv, it has to be wired in correctly or you WILL damage your tv big time, once installed the set has to be turned on and all 6 controls WILL have to be adjusted, your dealing with a high voltage device and it can kill you if you handle it incorrectly once powered on, in other words you will probably never get it adjusted right and it`s dangerous to do by a non tech, just trying to help you out here, video-tek

Posted on May 29, 2009

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Horizontal hold does not seem to work. horizontal lines in pic


hi,
Is there is white horizontal thine line on all over the screen then the screen voltage of you TV is high. Can be caused by bad base socket in the picture tube neck, faulty focus/screen block. Check the two things. You can see the base socket at the picture tube neck replace all the three base sockets for the three CRTs. if problem remains then you have to replace the focus/screen block. focus/screen block is one through which you can adjust the screen voltage and focus voltage. If the potentiometer in side it have some problem then this problem can occur. Have added the image for two items for your reference.
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ajin_g_51.gif
ok

Jun 09, 2011 | Mitsubishi WS-55807 TV

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...

2 Answers

Screen fades from normal at start-up to blue in about 10 seconds, TV stays on, display goes black, sound still on, and red light on front blinks 5 times


These sets kp51ws500 had issues with bad picture tubes----this set uses a Red,Green and blue picture tube.

The tubes are only available on a rebuild basis and very expensive. There is one thing that requires no parts replaced you can try: here are the instructions:

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You may have a bad blue picture tube but there is a way to deal with this first----the set has a black plastic block with six controls---three are Focus(red,green,blue) the other 3 controls are Screen controls(red, green, blue) Someone has to remove the entire piece on the front of the set below the screen(usually a plastic part) most of the time it is secured with 3 screws on either side of the set in the back; once you remove the screws the entire piece should pull out(pull from right to left(it will not fall off or come out easy--it is held in with several large plastic pegs) With it removed there is an inspection plate with 4 screws-----the screen/focus block is behind it.

You need to look very closely at the block to identify the focus versus screen controls----one row left to right will be marked Focus and the other row left to right will be marked screen------YOU need to locate the Blue Screen control(they are black like the block) With the set on(be careful) go to a video input clip_image001.gif with nothing connected---if you see a blue screen as well as the input number turn the BLUE SCREEN CONTROL SLOWLY TO THE LEFT UNTIL THE BLUE is gone.

If this cures the problem you may only be buying yourself some time----if the blue picture tube is bad sooner or later this trouble may return----I have seen sets where this was adjusted and the set worked for a year or more with no repeat of the trouble----replacing the blue tube would likely cost you 400 - 500 parts and labor.

I do this here for free so if this has helped you take a moment and give me a vote here.

SD TECH

Dec 05, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Fading blue screen


You may have a bad blue picture tube but there is a way to deal with this first---This is a 2003 model ---I did one of these with the same problem a week ago---the set has a black plastic block with six controls---three are Focus(red,green,blue) the other 3 controls are Screen controls(red, green, blue) Someone has to remove the entire piece on the front of the set below the screen(usually a plastic part) most of the time it is secured with 3 screws on either side of the set in the back; once you remove the screws the entire piece should pull out(pull from right to left(it will not fall off or come out easy--it is held in with several large plastic pegs) With it removed there is an inspection plate with 4 screws-----the screen/focus block is behind it.

You need to look very closely at the block to identify the focus versus screen controls----one row left to right will be marked Focus and the other row left to right will be marked screen------YOU need to locate the Blue Screen control(they are black like the block) With the set on(be careful) go to a video input with nothing connected---if you see a blue screen as well as the input number turn the BLUE SCREEN CONTROL SLOWLY TO THE LEFT UNTIL THE BLUE is gone.

If this cures the problem you may only be buying yourself some time----if the blue picture tube is bad sooner or later this trouble may return----I have seen sets where this was adjusted and the set worked for a year or more with no repeat of the trouble----replacing the blue tube would likely cost you 400 - 500 parts and labor.

IF YOU HAVE ANY QUESTIONS OR NEED ADVICE LET ME KNOW- I am here to help people.

SD TECH

Oct 06, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Mitsubishi Convergence issue


If the screen is out of focus you probably need to adjust the focus on the focus block it is usually located behind the front grill, there are 6 adjustment screws on this block, leave the screen controls along just adjust the red, green, and blue focus screws. When converging a set everything is converged to the green, the blue and red are suppose to come to the green.

Sep 02, 2009 | Mitsubishi WS-65311 65" Rear Projection...

1 Answer

Too much yellow does not adjust with normal drop screen adjustments. can i adjust the light beams.on my philips 50"


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Until the point where you can see the retrace line disappears, just before cutoff.
2. Turn the red screen control on the Focus Block until retrace lines appear and gradually turn it back
Until the point where you can see the retrace line disappears, just before cutoff.
3. Turn the blue screen control on the Focus Block until retrace lines appear and gradually turn it back
until the point where you can see the retrace line disappears, just before cutoff.
4. If the screen still appears too bright after proper G-2 adjustment, you need to adjust the sub-bright adjustment in the service menu
control down until screen cut-off. (Service data Range is usually 21 to 25 in the Service menu, for Sony sets you first go to category "MCP2", & then adjustment item 01( "SBRT")= subright.
For electrical the focus, put on the screen a clear picture of your choice thru an input of the TV set from a DVD, then pause the playback of the DVD Look into each color and rock that color focus control back and forth (turn the control one way then the other way slowing down as the picture goes into the best focus. till the picture looks sharp do each color till they all look in focus. NOTE: it is best to look into each color tube to achieve the best electrical focus. For optical focus please follow the manual lens adjustment in the sets service manual
By Larry Dillon

Aug 27, 2009 | Philips 50P8341 50" Rear Projection...

1 Answer

Images fading fast. Cannot read text on screen. Could hardly focus on images. Need to obtain part: Screen Focus Block


The lens is getting clogged. All u need if u have little expertise open up the TV.
and clear the lens or projection hd there with a soft clean cotton cloth

May 29, 2009 | Hitachi 51F59 51" HDTV Projection...

1 Answer

Poor pictre quality


This set has 3 CRT's (picture tubes)
Remove the back bottom cover
Clean the CRT's with windex and a soft cloth.
(Find the Screen/Focus block)----Remove front grill cover and panel which covers the Screen/focus block.
Cover 2 crt's and adjust the focus control for remaining crt---(using the convergence pattern in the menu for the set)
adjust for the best focus.
cover that crt and move on to the next crt using the same procedure.
After setting the focus on all 3 tube's you will have the best focus possible for this set. If picture is still bad, you have bad crt's and the set is junk.
Cost to replace the CRT's is enormous!
Craig

May 08, 2009 | Televison & Video

1 Answer

Focus


On CRT projectors, there is a part called a focus block with adjustments for each picture tube. A sudden loss of focus is pointing to something else, a change in the high voltage. Poor high voltage regulation will cause a loss of focus. If your loss of focus has been gradual, you can try adjusting the controls on the focus block. The focus block is usually a square or rectangular block, usually mounted on the front behind a panel or on the rear behind a panel. it will have a series of red wires coming out of it. There usually are 6 adjustments on the block, 3 for screen voltages and 3 for focus. Be sure you adjusting the right ones, they are usually labeled.

Nov 09, 2008 | Mitsubishi VS-45607 45" Rear Projection...

1 Answer

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...

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