Question about Toshiba 42H81 42" Rear Projection Television

1 Answer

Toshiba convergence We have a 42H81 about 6 years old. The red color suddenly shifted laterally. The red in the convergence focus responds up and down in several of the number locations but not side to side where it is significantly off. I read some of the other solutions online but was hoping you could confirm the exact parts I needed and possibly the best place to buy them. We are amatuers in electronic fixes but have successfully fixed a number of devices,circuit boards etc. We have a pencil type soldering tool. Do you think this is too tough of a fix for us? Thanks so much!!!!!

Posted by on

  • Kerrycarroll Mar 27, 2008

    Same model (42H81), same age (about 6 years). Turned it on today and the blue projection is shifted laterally. I can adjust the vertical on the blue, but not the horizontal. Would love to know how to fix this.

×

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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,030 Answers

This sounds like me to be a output resistor..these are usally half watt resistors next to the convergence ics. the fact that you can move the convegence hairs side to side indicates that the ics are still good. i have tried to located the resistor on schematic... i know that they are the big one next to the stk ic these are the big ones on the big heat sinks. 1 watt i beieve. im going to keep looking

Posted on Mar 18, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a toshiba tv model tp50g90 I have replaced the convergence chips stk392-110 convergence was corrected but I have a problem yet red not managed to focus on the user menu in the option of...


Thats the way it works. You have to adjust the other colors to the red. You adjust the red from the back of the set using the convergence magnets on the tubes. Then you adjust the other colors to match the red. It's much easier if you have the plastic screen from Toshiba used to align this set.

Feb 20, 2011 | Toshiba TP50G90 50" Rear Projection...

1 Answer

Sony kp-57hw40 double picture. regular and the other right next to it is red. tried auto focus and nothing happens. while holding auto focus btton down get red cross and white next to it. tv is 9 years...


Auto Focus button no longer work.Tv have a problems known as a convergence problems,it dead.Tv have colors lnes R,G,B mis alignment,have colors shadows pictures or 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 convergnce board to solved the tv pictures convergence problems.The shop,will cost u like $300-350 for parts and labors.

Nov 13, 2010 | Sony KP-57HW40 57" Rear Projection...

1 Answer

57H81 rear-projection Toshiba red un-aligned


sounds like to me that you need to replace the convergence IC's.

Apr 06, 2010 | Toshiba TheaterWide 52HM84 52" Rear...

1 Answer

Color shadowing on screen


I had similar symptoms about a year ago. Also came on sudden. The red convergence chip had burned out (poor heat sinking on this model Hitachi). Replacing the color convergence chips fixed it. ($50 for parts.) First, however, have you tried the "magic focus" function? That's explained in the manual, which is available online IIRC, but I'd have to look for the link if you need it.

Mar 02, 2010 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Old toshiba proj. t.v. red color bowed and not aligned


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 projeciton 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 photos of convergence problems.

42d3683.jpg

7859b01.jpg

e87380c.jpg
Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Jan 04, 2009 | Toshiba TP50H50 50" Rear Projection...

1 Answer

Convergence problem with Toshiba TV 42H83


I am still working on it! Need a technician in Alacante Spain!

Jul 25, 2008 | Projection Televisions

1 Answer

Toshiba 51h85c rear projection screen is red!!


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

Jan 14, 2008 | Toshiba 51H84 51" Rear Projection...

1 Answer

Suspected Convergence Issue on Toshiba 51H83?


Needs chassis pull & convergence IC's replaced....then
Touch Focus will work again..................T.

Nov 19, 2007 | Toshiba 51H83 51" Rear Projection...

4 Answers

Convergence problem with Toshiba TV 42H83


Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

Aug 04, 2007 | Toshiba 42H83 42" Rear Projection...

Not finding what you are looking for?
Toshiba 42H81 42" Rear Projection Television Logo

Related Topics:

54 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Dave Naylor
Dave Naylor

Level 3 Expert

834 Answers

The Knight
The Knight

Level 3 Expert

68427 Answers

Are you a Toshiba Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...