Question about Toshiba 50HX70 50" Rear Projection Television

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Duall image and strong yellow and green at bottom of screen

TV has dual images on lower part of screen for channel, guides etc.
Also Yellow is very strong along with Green.

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Re: duall image and strong yellow and green at bottom of...

Have you done a manual convergance adjustment from the menu?

Posted on Nov 04, 2007

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Re: duall image and strong yellow and green at bottom of...

You have bad connections on convergance ic solder them if that does not fix then replace them

Posted on Nov 03, 2007

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Images have some ghosting, but convergence lines seem to be OK. For example, white images have a yellow shadow to the right of image. Any suggestion?

Some easy steps to determine where and what your problem is:

1) In customer menu select convergence and then advanced (done with the Mitsubishi remote) look to see if grid of lines straight and if "yellow" is seen there.

2) Look to see if it happens when DVD etc played; If only on component from a cable or sat box but not on tuner or DVD inputs it is not the set.

3) Go to a channel that is in black and white and in customer menu turn COLOR all the way down: is problem still there or not?

If problem is not convergence and is present on all inputs it will be a problem with one of the three CRT boards; they plug onto bottom of each of the the three picture tubes this set uses; yellow suggests a problem with the blue one______loss of blue may give you a yellow smear around things/ red and green equal yellow.

You do not need to take the set apart for this.

Let me know what you find, the more you rule out the easier it is to know where the problem is.


Jan 10, 2011 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Dual images and strong Yellow and Green

this sounds like you have bad connections on convergance ics solder then be carfull not to solder them to gether if this does not fix the problem then replace the ics this will fix the problem

Nov 03, 2007 | Toshiba 50HX70 50" Rear Projection...

1 Answer

Color is mostly yellow and blue with double images

you have lost the convergence IC`s in your set, this really isn`t a diy repair unless you are very proficient in un-soldering and re-soldering components, once replaced there will be an alignment procedure as well that will require the service manual also, if you have more questions feel free to ask away, video-tek

Feb 04, 2009 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Funny colores and shades on my Toshiba projection TV

the convergence tube is the faulty part in this case a new convergence tubes replacing is required.

Jan 30, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

Yellow area on screen

either burn in or magnetic field interference. I suggest moving any speakers away from the tv. if thats not the case, then find a strong magnet, make sweeping motions across the screen with it but dont touch the screen! Keep doing this until the colors change, then "sweep" them with the magnet into a corner and they will mostly dissapea.......r, sounds complicated but worked for me. can be scary so dont try unless sickly despearate or confident.   Hope This helps!

Jan 24, 2009 | Panasonic PT-51HX42 51" Rear Projection...

2 Answers

Apex 51' gb5108

Just click below for convergence repair kit;

Double images and colors are blurry .Blue,red and yellow wave coming up from the bottom of the screen on the lower left and fuzzy images this is a symptom is for busted convergence IC,you must replaced this IC in order that will works better again.STK 392-xxx ICs and it's associated resistor,this resistor automatically change value,can caused truoble even though you change the ICs.If you bring this to a service center they cost you $600 to $700,but if you buy the repair kit you can save more,don't wory it is very easy because there is intallation guide including in the repair kit. Feel free to ask whatever the result... click the link for sample picture guide step by step installation;

Hope this may help;


Oct 10, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Just bought TV and connected with red,white, yellow and s-video connections. screen says NO SIGNAL. I have a satellite dish and dvd/vcr. the dvd/vcr image shows up on tv screen.

* Possible Problem *
It's not clear how you have each of the components connected to the TV, but you do mention that you used the "yellow" and s-video connections. Those are both video connections. The yellow is a "composite video" connection. Many TVs won't accept signals from both the yellow and the s-video connections at the same time. Usually one will override the other.

* Possible Solution *
Make sure the satellite dish is on and (hopefully) on a valid channel. Try disconnecting the s-video and checking the screen. If it didn't work, remove the yellow connection and replace the s-video cable. Check again.

If the problem persists, please explain how the TV, dish and the dvd/vcr devices are connected to each other (audio cables not relevant).

May 15, 2008 | Projection Televisions

2 Answers

I am told my Hitachi 61SDX01B (UltraVision/Ultrascan) has "Green Geometry"

Sounds like a convergence promblem.

Here are some of the most common symptoms of a convergence problem.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

Try to adjust the convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

Oct 15, 2007 | Hitachi 61SDX01B 61" Rear Projection...

1 Answer

Image retention

most manufactures say not to have a still image on the screen for more than 15% of your viewing time. to fix this you will have to replace the optical assy. i did come across a sony projection where the burn in was actually on the screens themselves. the only thing you can try is to put an all white video pattern on your tv for at least 48 hrs.

Oct 06, 2007 | Sony KDS-R60XBR1 60" Projection HDTV

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