Question about Hitachi 46F500 46" Rear Projection HDTV-Ready Television

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Focus block is at max still blue

I had a service tech come and look at why our 46f500a is blury. He tryed to adjust it with no luck and recommended to replace the focus block. He has done so and still is no better. I have to max all three colours on the focus and still have the blue running into the white text and picture is blury.

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The convergance amplifier have failed there are two of them they need to be replaced. there may be some pico fuses and resistors also. convergance failure is the most common rear projection tv it makes the set appear blury.

Posted on Feb 21, 2008

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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...

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Mitsubishi WS-65611 Repair kit from TV-Repairkits.com no fix.....


I have a few ideas but they all will require some more information from you. I know these sets very well-if you fixed the convergence problem my hat is off to you--it can be a do it yourself job but not the most easy set to do it on.

Let me assume you adjusted the convergence in the customer mode--it does on any of the HD models have to be adjusted in the regular and then the HD modes.

The only other thing here that may be the problem is FOCUS. A simple way to determine this is to remove the back cover--turn the set on and call up the advanced convergence grid---then cover the lens for each tube one at a time--with red and blue lens covered are the lines in sharp focus or look blurry?

Repeat this with only red or blue not covered and see what you think--if one of the tubes is out of focus you will see it there--

There is also a TECH menu for adjusting the convergence-like the customer menu but it saves the adjustments into the set's memory--you will need to hit menu and a four digit code based on the actual model number of the set.

Check to see if focus is or is not your problem-easy to tell--green, red, blue lines will either be sharp or out of focus--if out ask and I will tell you the simple way to adjust that.

If this information has helped you rate this solution as I do this here for free.

SD TECH

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Dec 22, 2009 | Mitsubishi WS-65611 65" Rear Projection...

1 Answer

My tv needs readjusted (color,focus,etc.)Is there an easy way to do so myself? i got a 1986 45'' RCA projection tv.it started of with just a blury spot across the top but after i messed with it the whole...


First pull back Look for screen and focus block you will have 3 controls ontop for focus and 3 controls below for adjusting screen drive to each Tube R/G/B
turn color off on Menu NOW try to Adjust the red,greenand blue screen drives as close asyou can to a Black and White picture then turn Color back on in Menu also adjust Focus for each Tube Be sure to Clean Top of Tube Lenses of dust&dirt Just in case Post me your Model and Chassis Number it will be on back of TV some RCA Focus&screen drive Block maybe in front of TV if so remove front bottom panel their you will see control box.

Nov 10, 2009 | Projection Televisions

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...

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

PICTURE PROBLEM(white hazy picture)


hi, symptom is caused by mis-adjusted focus, theres mechanical adjustment on lenses, and theres electrical on focus block, if tv was recently moved I would guess it`s mechanical, I strongly recommend you get a tech to do this, good luck video-tek.

Jun 02, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

Blue color


On front bottom panel remove behind it will be your focus/screen block cobtrol adjust Blue screen drive and focus also how to enter service mode for convergence with set off PRESS and hold at same time ch-&vol- untill set comes back on release you should now be in service mode for convergence.

Feb 19, 2009 | RCA D52W19 52" Rear Projection Television

1 Answer

Blury picture


Check the connections on the CRT circuit boards. there is a red wire that slides into the white plastic socket make sure that is connected good, If that doesnt help you may need a replacement focus block, But if so they are very cheap and very easy to install, and I can post a link where you can get one if you need it.

Jun 16, 2008 | Samsung PCL545R 54" Rear Projection...

1 Answer

Picture blury


Its behind the speaker grille up front , remove the grille and then a small access panel and you will see the focus control with 1 button for each CRT 3 buttons in all.

Jun 16, 2008 | Samsung PCL545R 54" Rear Projection...

2 Answers

Green shadows surrounding bright whites


finally a consumer that gives us plenty of info :)
sounds like an overdriven green tube, the only thing you can try is to find the G2/Focus block assembly, either behind front speaker grill or remove back of set and look for a black box approximately 5"X5" , this box will have 6 philips type adjustment screws(plastic) 3 are for focus, do NOT adjust these,
the other 3 are marked "screen" the center screen adjustment screw is for green, turn it VERY slowly counterclockwise while the set is running and pray that your problem dis-appears, be advised that this is a HIGH VOLTAGE device so one hand in your back pocket the other hand turns the screwdriver, if the problem does not go away you have a poor green tube, good luck, sorry I can`t give you the exact location of the G2/Focus block, manufacturers move them to different places every year.

Nov 29, 2007 | Mitsubishi WS-55809 55" Rear Projection...

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