Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television

1 Answer

Left side of sreen is blurry/halo effect. Right side is normal. Magic focus stops when it gets to green and flashes green number 5 on bottom left of screen. (Hitachi 2003 51" projection HDTV)

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  • newmankv Sep 15, 2010

    Thanks SD Tech. I may try this myself. I havn't soddered in 20 years. Can you get me step by step directions for fixing this problem.

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  • Hitachi Master
  • 14,553 Answers

SET uses two of the STK-392-150 convergence chips for this, both need to be replaced and set adjusted.

Parts cost on EBAY will be under 25 dollars. I can help if you are do it yourself person. A shop will get 250-300 for this but you can do it for much less.

Can I assist you?

SD TECH

Posted on Sep 15, 2010

  • 4 more comments 
  • newmankv Sep 15, 2010

    Thanks, I think I may try this myself. I haven't soddered since hihgschool. (20 yaers ago) Do you think I can do this.

  • SD Tech
    SD Tech Sep 15, 2010

    YES, I can tell you how to locate the chips and will help you. I also have yahoo IM if you wish to chat.

    SD TECH

  • SD Tech
    SD Tech Sep 15, 2010

    Yes, do you have yahoo IM?

    SD TECH

  • newmankv Sep 15, 2010

    no but i have yahoo email

  • SD Tech
    SD Tech Sep 15, 2010

    GET IM there and give me yahoo address so I can add you

  • newmankv Sep 15, 2010

    got it

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1 Answer

Can't bring into focus the entire image. Corners defocused and have green/purple halos.


If it is a known problem, then it is a manufacturing error. They have just admitted that is a MISPLACED washer. Have Optima repair it free of charge.

Mar 28, 2017 | Optoma Office Equipment & Supplies

1 Answer

Left side of sreen is blurry/halo effect. Right side is normal. Magic focus stops when it gets to green and flashes green number 3 on bottom left of screen.


All projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


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Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

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69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jan 08, 2011 | Hitachi 51F500 51" Rear Projection...

1 Answer

Goes through magic focus than in the middle stops and displays #5


This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 19, 2010 | Hitachi 46F500 46" Rear Projection...

1 Answer

Focus issue after replacing convergence IC's


pull the fron grill off the set then remove the cardboard covering the hole that is in the front of the set you will find a square box that has 6 controls on it adjust the focus for the red, blue and green crts, do not adjust the three marked screen control.

Sep 10, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

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

IMAGES ARE OVERLAID AND NOT IN FOCUS


Here is the schematic diagram. Download all the 13 parts and unzip them using winrar.
The parts you need are listed on page # 50 of the schematic diagram.
You will find the ICs HERE.
Make sure you check the fuses and micro/pico fuse nearby the ICs, as well some crystallized solder joints.
Good Luck.

Mar 16, 2008 | Televison & Video

1 Answer

Mitsubishi VS-50703 blurry after move


A halo effect usually means the coolant in the CRTs need replacing in the effected color usually blue goes first followed by green. red seems to be less prone for some reason.

Jan 14, 2008 | Mitsubishi VS-50703 50" Rear Projection...

1 Answer

Out of focus


Rach, if it doesn`t move from green to red to blue in Magic Focus then there is a problem with the convergence IC`s and probably one or more support resisters. These components will have to be replaced, questions? ask away, BMW Rider

Dec 14, 2007 | Hitachi 57F500 57" Rear Projection...

2 Answers

Color convergence?


Can anyone give me the resistor values for location RK 42, RK 46 and RK 62? Hitachi 46F500 TV. Or can I be pointed to the location of a service manual?
Tony

Sep 13, 2007 | Hitachi 46F500 46" Rear Projection...

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