Question about Toshiba 50H81 50" Rear Projection Television

1 Answer

Toshiba 50H81 manual convergence

Gentlemen,

I have a toshiba model 50H81 CRT type rear projection TV. Just bought it second hand and it appears that the red tube is rotated slightly from the other two which causes the red convergence to be bad at the lower left of the screen. Adjusting the convergence on the menus works for overall convergence, but because of the rotation the red will always be misaligned at one corner or the other.

I have removed the panels to be able to see the yokes of the tubes. The question is: what is the best way to rotate the red tube to get them all into alignment?

Thanks,
Rick

Posted by on

  • rbickle Jan 29, 2008

    ctf1800,



    Thanks for the reply.



    I don't know if it is a yoke misalignment or not. I was wondering what is the best way to correct the problem - moving the entire tube, or tweaking the magnet tabs. I assume that the manufacturer put some adjustment into it.



    As it is, if I set the convergence at the top right of the screen, the bottom left goes out by 1/4 inch or so. Vice versa for the upper right.



    The picture also seems to extend below the bottom bezel, but I can't find any screen size adjustments.



    Given these issues, do you think the problem is related to the convergence amps, or would it just be a tube that moved to to a jolt from shipping?



    Thanks,

    Rick

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 4,402 Answers

Are you sure it's yoke? these are know for bad convergence amp ic's
other wise it's a screw and glue holding the yoke in place loose the screw and try to break the glue with out breaking the plastic on the yoke, the other thing you can do is adjust the magnets which have tabs on the yoke. i would mark the position's of everything on the tube with a sharpie so you can get it back to start.

Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Posted on Jan 28, 2008

  • Cary Farah
    Cary Farah Jan 29, 2008

    I would not worry about this:

    The picture also seems to extend below the bottom bezel, but I can't find any screen size adjustments.

    as far as the the bottom left goes out by 1/4 inch or so. Vice versa for the upper right.
    it's only upper right i would go into the menu system and adjust the full convergence for the upper right.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Focus error 50h81 toshiba red line problem


Tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadows or have 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts must be replaced on the tv convergence board to fix it.To solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

Jan 01, 2011 | Toshiba 50H81 50" Rear Projection...

1 Answer

Blue color is off and bowed at bottom


Needs the 2 convergence amplifiers replaced and then convergence alignment carried out(Could be pricy)

Dec 04, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

The red will not line up when it is in the


You have a yoke and screen voltage issue with your red crt tube. If the red moves but not enough to do the convergence then you may be able to adjust the red crt. If the red doesn't move at all when you try to do the convergence then you most likely have bad convergence IC chips that need to be replaced. They aren't expensive, the last pair I did cost $36, but it involves taking the set apart and doing some tedious soldering. If you have no experience with this sort of repair you may want to go to a shop, They will charge $300-$400 to replace the IC chips. If you want to try this yourself post back and I can help point you in the right direction. 

Nov 29, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

Hi i need a picture tube (the blue crt) what all models and sizes of Toshiba fit if i was to go used? It is a toshiba 50h81


You can also use picture tube part number 23008517 which is in model 57H81. Please note that these tubes are no longer available frmo Toshiba.

Dan

Nov 02, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

Can not adjust red convergence up or down it will adjust left or right


replace the convergence ICs and resistors. You can get the repair kit for your model at the following link. The kit contains the parts and instructions.
http://servicemanuals.vstore.ca/product_info.php/pName/toshiba-50h71--50h81-convergence-repair-kit/cName/convergence-repair-kits

Jul 10, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

Color convergence messed up


you can get the convergence repair kit for your model that has both convergence IC and the six feed resistors at this link, The repair kit also has step by step instructions with pictures so you can do the repair your self. Heres the link.The 50H82 kit is the same for the 57H82, http://servicemanuals.vstore.ca/product_info.php/pName/toshiba-50h71--50h81-convergence-repair-kit/cName/convergence-repair-kits

Feb 01, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Toshiba 50H81 Projection TV


youre convergence ICs need to be replaced there are two of them they are both STK392-110 you can get replacement Ics and free instalation instructions at the following link.
http://servicemanuals.vstore.ca/

May 24, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Toshiba 50H81


convergence amp ic are bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 16, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Toshiba 50h81 turn it self off then back on


Did you check the supply fuses to the convergence ICs? Did you check the output resistors
then i would start by replace the convergence ic first.
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Dec 01, 2007 | Toshiba 50H81 50" Rear Projection...

1 Answer

Toshiba 50H81 TAC0151 Blowing Fuses, I Need schematic


Well without the schematic, knowing Toshiba they have alot of convergence problems, so see if the fuse blown in the convergence area, if you you may have to replace convergence amps. These are the big STK's. Most of the time there was a color problem with set before going out. If no problem with this on your set then look in the HV area Hor. and Ver. area. Hope this helps!

Sep 09, 2007 | Toshiba 50H81 50" Rear Projection...

Not finding what you are looking for?
Toshiba 50H81 50" Rear Projection Television Logo

251 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75846 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

Are you a Toshiba Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...