20 Most Recent Hitachi 51GWX20B 51" Rear Projection Television Questions & Answers

You have a convergence problem. If you are handy, you may be able to repair this. The signal module will need reworked. The best repair for you, or some one you know, who is an electronic servicer can get help. Please see the website www.TvRepairKits.com. You will find the best repair kit. I have used this website to repair a few of the Hitachi Projection TVs. The instructions, and parts,, along with photos, will be very, very helpful. Have your TV model number close by, as you search this website. Thanks for asking and show a few hands of support!

Hitachi 51GWX20B... | Answered on Mar 06, 2011


It's a convergence issue. Go into the main TV menu under video settings and look for convergence. If it has an auto convergence select that and wait a minute the TV will adjust itself and give you a clear picture.
If the TV does not have an auto convergence and just regular convergence than select this. It will give you a grid pattern on your TV and you have to move the cursor (using TV remote) and adjust each "point" so that each line is perfectly white. If you notice red or blue anywhere on that "line" then you have to adjust using the up, down, left and right arrow keys to "line up the red and blue lines with the nearest white line. It takes time and patience to do, but when completed, all lines on the grid pattern should be pure white and you will have a great looking picture.
You have to do this will all TV inputs (Video1, Video2 and so on) the reason Zoom looks good, is because you never used that screen as much and so the lenses didn't have a chance to get out of synch.
RPTV's are made of the three lenses (red, Blue and Green) and as you watch TV, these lenses slowly get out of alignment. So you should do a convergence about twice a year to make sure nothing is out of whack.

You can pay somebody to do it, but may cost you like 100.00 or do it yourself, it is very easy just tedious and time consuming. If you have the auto convergence than your golden because this is the easiest way to "reset" the TV.

Hope this will help in solving the problem....

Hitachi 51GWX20B... | Answered on Jan 12, 2011

Projection sets have two very common problems.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou 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

Hitachi 51GWX20B... | Answered on May 30, 2010

This sound like a Bad Optical Block. If this is a Hitachi, and it is less than 3yrs old, I would try to see if Hitachi will help with the repairs. You would still need to get a local authorized repais facility out to comfirm it is the Opical Block. They should be able to help with that as well.
Hope this helps,

Hitachi 51GWX20B... | Answered on Jun 29, 2009

You have a defective CONVERGENCE IC. Most TV use 2 identical STK IC & both has to be replaced at the same time. If you are not a technician I don't recommend doing it yourself. There is a lot of desoldering to remove the chips with 16 or more pins- and soldering the new ones.
Good luck! Astrotech

Hitachi 51GWX20B... | Answered on May 28, 2009

There is not a Service code to Enter into convergence on this set , on convergence board there is a switch on the very front of board WITH set on press and hold 3secs you should see convergence Pattern Appear after you release button. From the Front of TV remove Bottom cover then you will be able to see whole chassis,and the Little Blue contact switch.on same board you replaced ICs.

Hitachi 51GWX20B... | Answered on Jan 16, 2009

Bad capacitors in power supply circuit.47uf 250v

Hitachi 51GWX20B... | Answered on Jan 10, 2009

STK392-560 STKS convergence CHIPs Replace both of them.

Hitachi 51GWX20B... | Answered on Jan 10, 2009

Replace Your STK ICs.STK392-110s use 180s if 020s use 040s if 560 or 570 use the same.

Hitachi 51GWX20B... | Answered on Jan 10, 2009

Problem seems in convergence out section.

TV needs Convergence Out ICs replacement.

If you have TV repair experience and know good soldering work then you can give it try OR get help of qualified TV tech to fix it.

If you need further help, let me know.

Hitachi 51GWX20B... | Answered on Dec 30, 2008

i founfd this, it could be the problem. Symptom: NO VIDEO Cause: Found L306 was open. B+ to pins 21,22 of PFC2 at the FC. find L306, will be hard to find with all the boards, but L306 is a coil. if you can find it use a multimeter to see if it's open. 450 sound slightly high but if you have a service call or pickup & delivery it might be right. hopefully you find the coil bad. good luck.

Hitachi 51GWX20B... | Answered on Nov 27, 2008

Do you mean that at the top of the picture, the red color has shifted downward, bowed towards the center? If that is what you see, one color suddenly bows toward the center on any side of the picture, then it means that one of your convergence IC's has burned out and needs to be replaced. It is a good idea to go ahead and replace both STK392-110 IC's with the newer improved STK392-150's. If you have never replaced convergence IC's and realigned the convergence circuits in a projection TV then allow a qualified tech to handle it for you.

Hitachi 51GWX20B... | Answered on Jul 02, 2008

You would need the remote control to select the MENU, then LANGUAGE.

Hitachi... | Answered on Nov 11, 2020

Use code search on your Sudden Link URC to find something that woks. If a search through all codes stored in the URC fails, try a different one.

Hitachi... | Answered on Oct 29, 2020

I am guessing it's an old(ish) TV. As a plasma the chances are that it is on it's way out.

Please Try new cables (HDMI etc)

Hitachi... | Answered on Sep 29, 2020

I don't know but it probably isn't much different to most other tv/remote combinations where commands are given by the remote and carried out by the brain in the tv.
Start by pressing the Menu button and the main menu should appear onscreen and from there use the up, down, left and right buttons to navigate the main menu and the select button to select sub-menus and items from the menu(s) until you reach the section on channel search, installation, etc.

Hitachi... | Answered on Sep 27, 2020

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
View the site by desktop or web view on mobile devices to see the "search box". Type in the brand name of your set in search box; to get gathered the related posts.
Screen-shots to defective LCD panels are given. You can see and compare to that to your TVs', and can make sure about the fault to an extent.

Hitachi... | Answered on May 27, 2020

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