Question about Televison & Video

1 Answer

Very wierd Toshiba video problem

I obtained this Toshiba tv/dvd/vcr unit a few months ago. It had been dropped and no longer worked. Model MW26G71. The main pcb was damaged, the high voltage transformer was completely broken away from the circuit board. I repaired the board to somewhat functional status but had a distorted picture. The picture looks like the degaussing circuit is energized all the time. I can e-mail a picture of it for examination. So I figured that the board had fyther problems.. Replaced main board and still had the wierd picture, replaced the power supply, no help. Replaced the video chip on the VCR board, no help. The next part is 200.00. Would like some opinions on this problem, hate to trash a good tv. [email protected]

Posted by techman2429m on

  • techman2429m Sep 18, 2007

    THANKS FOR THE RESPONSE, I REALLY WOULD LIKE TO SEND YOU A PICTURE OF THE PICTURE, YOU WON'T BELIEVE IT TILL YOU SEE IT. A CONVERGENCE PROBLEM SOUNDS POSSIBLE BUT YOU WON'T THINK SO IF YOU SEE THE PICTURE. I VISITED THE PEOPLE THAT GAVE ME THE SET, THEY HAVE A 15 INCH VERSION OF THE SAME SET, I DON'T THINK IT USES THE SAME ELECTRONICS, IF IT DID I'D SUB IT AND VERIFY WHEATHER IT'S THE CHASSIS OR A SHORT IN THE PICTURE TUBE. I'LL GET THE MODEL NUMBER AND RESEARCH THE PART NUMBERS BEFORE I SCREW UP THEIR OTHER TV. LOL.
    THE RINGS DID GET MOVED SLIGHTLY, THE WHITE PAINT WAS USABLE TO RESET THE ONE RING THAT HAD MOVED 1/32 OF AN INCH. IF I WERE STILL INTO FIXING A LOT OF TV'S AND OTHER STUFF, I DEFINITELY WOULD USE THE PREMIUM PLAN.

  • techman2429m Sep 19, 2007

    Thanks for looking, I figured that this case would most likely be the $200.00 VCR board. I did replace the Video, chroma processor on that board, everything else is SMT stuff and don't have the capabalities to repair such.I checked the video 1,2 input and the ringing was still prevelant, thus eliminateing the tuner section. I will look at the convergance, thanks for your input and will keep you posted on the progress. I will order the chip and see what happens. I can cut it out (OFF THE BOARD) I can't see a component fault since it worked before the fall, a crack or a cold solder most likely. I did examine the board with a maginifing glass when I replaced the chroma chip, 56 pins on that baby.Found no visiable damage.
    When I finish this task, do you know where I can sell, give, dispose of the good parts for someone else to use?

×

Ad

1 Answer

Anonymous

  • 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
  • 1,139 Answers

Hello techman2429m, It looks like you may have a color convergence problem. when you dropped the TV the convergence/purity rings on the neck of the tube may have shifted or by changing parts you may have thrown off the convergence. I would suggest using a pattern generator and adjusting convergence also adjusting the purity settings. This I believe will clear up your problems.

Posted on Sep 18, 2007

  • 1 more comment 
  • Anonymous Sep 18, 2007

    Ok send me a picture of the set at [email protected]

  • Anonymous Sep 19, 2007

    I took a look at your pictures. It looks like the convergence section may have been damaged. in the drop. or at least some voltages might be a bit off in that section. Try to get a schematic and check the voltages in the convergence section, this does not look like a picture tube problem, but rather a convergence problem or even a tuner issue. I woul use a universal video analyzer to send an known good signal into the TV and then beging troubleshooting the set to see which sections of the TV were affected by the drop. You nay have multiple cracks on the circuit board and these possibilities need to be investigated

  • Anonymous Sep 19, 2007

    In most cases you could donate the parts to the salvation army or goodwill who I believe runs it's own TV repair center. QAlso you could try your local vocational high school.

×

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

How do I program the Toshiba CT-90325 remote to control the Toshiba SD-V280 VCR/DVD player?


If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. Common codes used for devices too are given, in the order of device brand name list in alphabetical order. Do a search by type in the brand name of your device, at its search box, and press "Enter". Or, pull up older posts.
http://remotesearch.blogspot.com/
http://electrohelponline.blogspot.com/

Jul 23, 2014 | Toshiba Original CT-90325 TV Remote...

1 Answer

Set won't turn on. has a buzzing soune


Power supply board is dead.Replaced the power supply board will solved this problems.Tries Shopjimmy.com,Ebay.com for a refurbish power supply board.

Feb 20, 2010 | Toshiba MW26G71 26 in. TV/VCR/DVD Combo

1 Answer

After turning on tv 5 to 10 minites later a black


this is closed caqption go into menu and turn it off or if remote has cc button turn it off with that.

Aug 11, 2009 | Toshiba MW26G71 26 in. TV/VCR/DVD Combo

1 Answer

Need Toshiba remote access code for this product so I can use a universal remote to operate the VCR and DVD


remote codes are set by the manufacurer of the remote not the tv. if there are any others not listed in instructions for remote, the manufacturer of remote would have them. most combo unit are not able to be programmed into universal remotes due to the fact that there are alot of specialized function buttons on original remote. you can obtain a replacement remote thru toshiba

May 16, 2009 | Toshiba MW24F51 24 in. TV/VCR/DVD Combo

1 Answer

Have a Magnavox DVD/VCR player Model MWD 2206A,


units like DVD's, have the tendency of malfunctioning if not used for quite sometimes.corrrect me if i'm wrong.but like automobiles needs tune-up, right?try power it on for some time, but not using it.if still not call a tech

May 13, 2009 | Philips Magnavox DVD/VCR Dual Player

1 Answer

Toshiba Model: SD-V295 DVD/VCR Combo Setup for TV recording


The proper hookup is antenna or cable into the VCR RF/antenna input, then VCR RF/antenna output to the TV RF input. The hookup you describe means no signal is getting to the VCR.

With some TVs, there can be Video and audio output jacks which can be hooked to the video and audio jacks of the VCR. However this would likely mean you could only record the channel being watched, and, the TV would have to be on.

Jun 07, 2008 | Toshiba Televison & Video

1 Answer

Connecting dvd/vcr combo with tv and digital cable box.


You trying to put the DVD/VCR combo between the cable box and the TV? OK, cable out goes to vcr in, vcr out goes to tv, I think you got that. Now there should be a tv/vcr button on the vcr/dvd, you need to press that when the unit is on. Also, make sure you are on the correct input on both the vcr and the tv, usually video 1 or AUX and choose line in or L1 on the vcr/dvd. If the tv/vcr button is toggled, itll completely bypass the vcr/dvd player.

Mar 03, 2008 | Toshiba 32A41 32" TV

1 Answer

No sound, no picture


Try with external monitor and let me know did u see ur desktop with external monitor?
OK?

Nov 24, 2007 | Toshiba MW26G71 26 in. TV/VCR/DVD Combo

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

204 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76403 Answers

Cindy Wells

Level 3 Expert

6120 Answers

Marvin
Marvin

Level 3 Expert

85239 Answers

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

Answer questions

Manuals & User Guides

Loading...