Question about Toshiba 50H82 50" Rear Projection Television

Open Question

Toshiba 50H82 Rear Projection TV Auto Focus Error

I have a Toshiba 50H82 HDTV rear projection, with what looks like a convergence problem, but only the green gun and only in the vertical! tried the Touch Focus, and I get a red message on screen that says "Touch Focus Error", the picture is still displayed with a skew on the green color, almost looks like a 3D picture without the funky glasses to make it better! Any help in appreciated, I have a electronics background (not television though) so any technical work I could manage.
Thanks
M

Posted by on

  • joevito Sep 21, 2008

    YES,I THINK I HAVE THE SAME PROBLEM,WHEN I PRESS TOUCH FOCUS,BOTH SETS GREEN LINES ARE MOVING AND AND OK,THE SAME WITH THE RED LINES,ALL OK.BUT WHEN THE BLUE LINES COME ON,THE FIRST SET SEEM OK BUT THE SECOND SET ARE STILL AND THE TOP AND BOTTOM BLUE LINE ARE CURVED!!!! CONVERGENCE PROBLEM? I CAN GET A CONVERGENCE BOARD,# PD1731A-1 - 23599979!!!! AND A COMPLETE BLUE CRT WITH ALL THE CIRCUT BOARDS,#PD1733A & 23599981B,, TYPE P16MAD00BMB {CRT} �{CRT}!!!!! CAN YOU TELL WHAT PART I NEED TO FIX IT!!!! THANKS JOE PIRELLI

×

6 Suggested Answers

  • 1694 Answers

SOURCE: Touch Focus Error

Even if the pix appears to be "OK", the internal convergence

alignment (in servicer mode) must be accurate within certain

parameters for the Touch Focus function to complete w/o error.

Adjustments should be done in "Full" mode,both HD & regular

signal.

Posted on Oct 13, 2007

  • 1694 Answers

SOURCE: Toshiba 42H81 Rear projection "Convergence problem"

Also,check micro fuses F851,F852,etc.
and with a good digital meter, check resistors feeding B+ to
convergence circuit.
I have been using Stk392-110T made by Toshiba with no re-calls.Hitachi also has an upgrade IC.
And be sure to check your soldering of IC pins--good connect,
with no short.....T.

Posted on Oct 25, 2007

  • 5 Answers

SOURCE: TOSHIBA REAR PROJECTION TV 42H81

you have a convergence problem that will require the replacement of the convergence amp ics.

Posted on Nov 29, 2007

  • 4234 Answers

SOURCE: hitachi ultrascan HD pic looks like a 3D movie w/o the glasses

You have a problem with teh convergence circuits. This can be caused either by defective convegence ICs or even bad connections at the pins of these ICs. I would first resolder the pins on the ICs. If that fails, replace them. That should resolve the problem. These ICs are large and black, attached to a heatsink and are marked STKxxx. There should be 2 of them.
Dan

Posted on Apr 03, 2008

  • 1030 Answers

SOURCE: RCA 52inch Model R52WH77 HDTV

may i suggest reading the ariticle the fl231 problem in my tips and tricks section of my profile. YOu MAY have a 5 dollars 30 minuter fix. Determine if you have the convergence option under the setup option of the customer menu. if you dont then congratulations you have a simple fix. i you do have the convergence option and the autoconvergence then you might have other problems. and will have to troubleshoot further. If so ill talk you through some more. THIS set has NO stk convergence ics. my feeling is the fl231 which i see alot on this perticlar model at the shop

Posted on Oct 08, 2008

premtech
  • 934 Answers

SOURCE: Toshiba 50H82 convergence problem

spyke,
You might try setting in manual convergence and see if you get the same results. If so, YES, I would say that you possibly have to replace the convergence amps Q751 and Q752... That unit takes two stk392-110 Sanyo amps. When you buy them don't get knock-offs for some cheap price or you'll do the job twice. Order from someone like ACME in Florida. You can up the amp rating to 150's or 180's if 110's aren't available - but 110's will work just fine... Check your return resistors out in front of the amps also for any deviation in value.
You might also check for the presence of your -32v at Q783 and if missing replace it also - but from what symptoms you're describing it may only be the convergence amps..
Be glad to send you the manual, just email me personally and give me enough info as to what you need - I get nearly 3000 emails a day so "send me the manual" will not be enough to jog this old man's memory..
Good Luck!
Bill

Premium Technologies
premtech@willapabay.org

Posted on Oct 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Shows a red scream


try the auto focus if shows error then try to do it manually in convergence and make sure you align all colors. If still doesn't work, then you will have to have the convergencs chips replaced.. Approximately $250 repair cost..

Mar 07, 2010 | Toshiba 50H82 50" Rear Projection...

1 Answer

How do I know I need a new projection lamp? My tv


This set does not have a lamp. It has 3 crt tubes that converge to create a color picture. The convergance is off a little causeing this affect. Go into the menu and look for convergence or magic focus. You can download the owners manual from Toshiba website to do this. You will need the remote that came with the set.

Nov 30, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

What do convergence chips look like


f37d630.jpg
This is what a convergence IC looks like.

Oct 19, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

3 d images on toshiba 50hd82


This is a convergence issue, the stk392 ic's have failed on the convergence board, if you want to tackle this issue your self you will need soldering skills and a dvm. This is a common issue with all projection tv's.

Sep 01, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

Toshiba 50H82 rear projection TV adjustment


The ser needs to be converged in the factory service mode

Jan 14, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

Toshiba 50h82 convergence issue


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 11, 2008 | Toshiba 50H82 50" Rear Projection...

1 Answer

Convvergence problem w/ Toshiba 50H82


You need to replace following ICs, may be 2 pieces in your tv for convergence problem.
IC, STK392-110T

Toshiba Part Number: 23135090X
Please search on net for availability in part stores

Sep 27, 2008 | Toshiba 50H82 50" Rear Projection...

1 Answer

TOSHIBA REAR PROJECTION TV 42H81


you have a convergence problem that will require the replacement of the convergence amp ics.

Nov 29, 2007 | Toshiba 51H83 51" Rear Projection...

Not finding what you are looking for?
Toshiba 50H82 50" Rear Projection Television Logo

Related Topics:

454 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

68352 Answers

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

Answer questions

Manuals & User Guides

Loading...