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!

Hi,

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....

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

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

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,
Skyassoc

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

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.

Bad capacitors in power supply circuit.47uf 250v

Audio output chip.

STK392-560 STKS convergence CHIPs Replace both of them.

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

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.

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.

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.

That sounds like it is not booting properly. I would check for correct power supply opperation and if not that, look for a software reloading procedure in the user instruction manual.

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I'd unplug/disconnect the Roku and after 30 seconds try the control button on the back. If you can change the input do so, then plug the Roku back in. Until you use the input button on the back to change input to Roku, you should be able to use the other buttons on the back to control the TV. If this does not work, unplug both the TV and the Roku. Wait maybe a minute, then plug the TV back in and follow the above instructions. Here are other alternatives: Using physical buttons: You can find the physical buttons on the left or right back side of the Hitachi TV. Using these keys, you can change the input, adjust the volume, or turn on Hitachi TV without a remote. Press the Input button located at the back or side of the Hitachi TV. The list of connected sources will appear on the TV screen12. Using external devices: Connect a wireless keyboard or mouse to your Hitachi TV and change the input1. Buy a universal remote: You can buy a universal remote to control your Hitachi TV and change the source.

A little popup that appears in the lower left corner of your Hitachi smart TV screen may be related to one of the TV's settings or capabilities. You can attempt the following actions to get rid of it: 1.Investigate notifications: Smart TVs occasionally show notifications for different events or upgrades. If there are any notifications, look for them and then clear them by following the on-screen directions. 2.Applications and Inputs: Make sure all programmes and inputs are closed. The popup may occasionally be connected to an input source or app, which can be closed to get rid of it. 3.On-Screen Display (OSD) Off: There might be an OSD option in the settings menu on Hitachi TVs. Try disabling OSD or changing its settings to see if it gets rid of the popup. Verify any software/firmware updates: 4.Make that the most recent firmware or software upgrades are installed on your TV. Pop-up windows may appear as a result of faults in outdated software. Look for a software update option in the TV's settings menu. 5.Firmware Reset: You can conduct a factory reset on your TV if the problem persists after you've tried various troubleshooting measures. The default values for all settings will be restored as a result. Make cautious to back up any crucial data before doing a factory reset because doing so will also remove any customised settings and data. 6.Message Hitachi Support here: If none of the aforementioned fixes the problem, it's a good idea to get in touch with Hitachi customer service or refer to the TV's user manual for detailed instructions on how to get rid of the popup. Regarding External Devices: 7.The popup may be related to any external devices you have connected to your TV, like a cable box or game console. Make sure that these gadgets are operating properly and that the settings have been changed as necessary. Keep in mind that depending on the type and software version of your Hitachi smart TV, the precise processes and options may change. For instructions unique to your TV model, consult the user manual, or go to the Hitachi website for further help options.

Are you getting the various HDMI inputs on the screen but it acts like nothing is connected? We have repaired hundreds of TV's with no HDMI signal over the years and have never had an update correct this issue. There is an IC close to the HDMI input jacks (U501) that decodes the data, that's always been the defective part. You can order the part and change it but you will need advanced soldering skills and the equipment to do it, I'd recommend replacing the main board if you can find one.

Take it in for repair unless you are a DVD repair person. The only thing you can try is a DVD Cleaning disc. You don't say what it does or doesn't do except it 'doesn't talk'. Well it isn't supposed to talk, it should play DVDs :>D Only Smart televisions have Bluetooth. Here is your manual, you could attach an external DVD if you can find one that has a SCART connector. https://www.manualslib.com/manual/466636/Hitachi-L22dg07u.html?page=12#manual It is 11 years old according to the review, and it get 6/10. https://www.avforums.com/reviews/hitachi-l22dg07u-22-inch-led-lcd-dvd-combi-tv-review.360/#:~:text=The%20energy%20efficiency%20is%20excellent,music%20via%20the%20USB%20port. ..