Question about Toshiba 43HX70 43" Rear Projection Television

1 Answer

Toshiba 43HX70 poor picture quality after replacing convergence ICs

TV tech replaced convergence IC's after the convergence went completely wacko....Convergence is perfect now, but the image quality is dull and grainy rather than the crisp, lush picture we had before. Watching DVDs is now like watching some 20 year old VHS tape from the basement or something. Tech just says the tubes looked a little "gassy" and it has nothing to do with the repair........Before the convergence issue happened days ago, the image was terrific. Can changing the ICs create this problem, or did it 'just so happen' that the tubes started going bad just when the original ICs failed?

Posted by jillw on

  • jillw Nov 07, 2007

    just tried to delete my own inquiry about our tv problem before anyone spent time thinking about it for us......seems we resolved it on our own by tweaking settings in the Toshiba menu and realizing we had our cheesy DVD player (for the kids) connected instead of our good one.....simple fix......

×

Ad

1 Answer

Cary Farah

  • 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

Good job

Posted on Feb 08, 2008

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

How do you fix convergence on a sony tv?


hello!
If convergence in your TV went out suddenly and severely, there is nothing you can "adjust". That's a parts failure, convergence amplifiers I.C. chip(s) went south. Needs repair! Period! Minor alignments could be done by applying "flash focus" or "manual convergence" off "menu", if available.Some models have "flash" only option. Anyway, make sure there is no large metal structures near the front of TV or large speakers nearby. that could convergence to go out. Try not to play with any adjustments, if severe convergence problem. you won't be able to fix it right and will corrupt memory settings for "flash" option.
thanks,
Alex.

Feb 16, 2012 | Sony Televison & Video

1 Answer

RCA D52W23: Only partial convergence menu. I can only access Autoconvergence, Red and Blue convergence options (not Level 1, 2, 3, etc.) in the service menu. The picture is only slightly off (i.e. green...


Please do us a favor and rate this by cliking the thumps up icon located here >>>>>>

Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

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 projection 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 pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

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

May 31, 2011 | RCA D52W23 52" HDTV CRT TV

1 Answer

Red color convergence issue; Red lines are curved


This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 24, 2009 | Televison & Video

1 Answer

Convergence and distortion problem.


This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 31, 2009 | Panasonic PT-47WXC43 47" Rear Projection...

1 Answer

Blue Ghost


you will need to replace 2 stk ic [ parts ] after that the technician will have to realign the picture, sometime also some resistors get bad along with one or 2 fuses

Dec 15, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Image


Samsung parts for convergance problem
http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx

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/

Jan 29, 2008 | Samsung HCM5525W 55" Rear Projection...

1 Answer

Red gun suddenly went wacko


Red Convergence IC bad.....small circuit board by itself up
above main boards..........replace both IC's for reliability...
STK392-040.........DO NOT USE GENERIC IC'S ! I use only
PANASONIC brand = no re-calls !!
Re-align when repair complete............T.

Jan 28, 2008 | Akai PTH5498 54" Rear Projection...

2 Answers

Auto convergence not working 142cm LG rptv


If the colors will not line up in one corner of a standard projection set, it usually means that one of the convergence output IC's has burned out and needs to be replaced. This is very common. If you do not have experience replacing parts and soldering PC boards, then the defective IC should be replaced and the convergence circuits realigned by a qualified tech familiar with convergence circuits in projection sets.

Aug 26, 2007 | Televison & Video

2 Answers

No power with remote or manual power switch


Your convergence module is probably bad. It is a plug in module, so labor would be lower if the convergence settings are still good. The bill would be about $300.00 If not, the labor for convergence would add to the bill. If the whole job needed full convergence the cost would be about $500 to $600. Hope this helps, Lee http://www.CrazyComputers.com

Jun 22, 2007 | RCA P60921 60" Rear Projection Television

Not finding what you are looking for?
Toshiba 43HX70 43" Rear Projection Television Logo

Related Topics:

139 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76407 Answers

Muntejaya Ginting
Muntejaya Ginting

Level 3 Expert

10422 Answers

matt martin
matt martin

Level 3 Expert

1258 Answers

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

Answer questions

Manuals & User Guides

Loading...