Question about Toshiba 43H70 43" Rear Projection Television

1 Answer

Rplaced both IC's and now need fine tuning

I replaced both RGB driver chips (IC's) and also one resistor that was bad. The picture is much, much better however when re-setting the convergence I cannot get #3 and #9 convergence on blue to line up wiht red and green.
Thank you for you help

Posted by on

  • mlmaschmeyer Feb 11, 2008

    I was able to find a blog on getting into the service mode and I was able to adjust the colors that way. Set is good as new.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toshiba Master
  • 8,617 Answers

You probably got 1 more resistor that is out of tolerance. These resistors have to be within 5% of their rated specs if not that's your problem. Check them with a digital meter with one leg of the resistor out of circuit for true readings

Posted on Feb 01, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Bowed screen after replacing ic chips and resistors on a 57F500A


The 150 never seem to fail, either new chip bad, you missed a bad resistor, something during soldering bridged or shorted, worst possible reason would be the DCU is bad and it is the least likely.

98%of the time in this situation you either missed a bad part, installed a bad part, or created a problem with the soldering or removal of parts.

Apr 04, 2012 | Projection Televisions

1 Answer

Replaced IC chips, but can't fine-tune convergence.


U know how to use a multimeter right?Check and replaced all the resistors near the 2 convergence ICS.Most resistors are big and blue core in colors.

Feb 15, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I have a Sony KP-61V60. I seem to have a problem with the color covergance where my screen looks almost 3D with the red sticking out. What do I need to do to repair this myself? How do I know if my RGB...


If you go into the customer menu and select CONVERGENCE and red or blue will not adjust in some direction you have a Convergence circuit problem.

Most of these sets use two STK-392-110 or STK-292-560 CONVERGENCE ic chips.

Both chips need to be replaced. If convergence will not adjust you do not have a bad "bulb" these sets use three picture tubes--red, green, and blue and the convergence circuit "converges the three pictures".

Usual parts cost total is under 30 dollars if you buy the parts on Ebay--there are places on the net that sell kits for 70 or more---they contain the pair of chips and other parts that may be needed--from my point of view they are a waste of money as most of these sets just need the two chips replaced--some will need a bad resistor around one of the chips located and replaced as well--on Ebay you can buy a pair of whatever chips the set uses for under 20 dollars including shipping.

Right now the site where I research these models for exact part numbers is down but I can help if you have some skill at soldering and want to fix it yourself. Most shops are going to get 300 or more for this type of repair.

Let me know if you have questions or need help.

If this information has helped you rate this solution as I do this here for free.

SD TECH

Nov 25, 2009 | Sony KP-61V90 61" Rear Projection...

1 Answer

My red convergence won't move side to side only up and down what do i do? the blue moves up down and side to side, i noticed this when the picture as we were watching it decided to turn 3d, so i tried to...


Most of these Philips sets use two STK-392-120 convergence IC chips; if you can locate them inside look at all the little blue resistors to the left and front of them---these are feedback (protect) parts---if any of them are discolored in the middle--not powder blue but somewhat white in the middle---you have a bad ic and both need to be replaced---most of the protect resistors are 6.8 ohm in value. If this has been helpful give me a vote.

Aug 14, 2009 | Philips 60PW9363 60" Rear Projection...

1 Answer

60 inch has no red


Hi, you`ll need a tv tech for that one, either no red out from rgb chip, bad driver ic, etc. none of these repairs can be done without special tools, video-tek

Jun 29, 2009 | Philips 60P8342 60" Rear Projection...

1 Answer

Picture bends in different colors


your Convergence IC chips and resistors arre failing you need to replace them

below is a general disscussion post for a Philips TV which will help you to understand your situation and what you might need usally you will need (2) IC convergence Chips and usally (12) Resisitors what have to be soldered onthe the board after you remove the old ones. this fix usally cost you to do it yourself $30, to have a repair man do it cost around $300-450 a new board if avalible usally costs $250-300

Sorry, for the bad new I hope you have a friend that knows how to work on circuit boards...
good luck,

below is a general post about a philips TV Convergence problem you can read about keep inmind your CHIP and RESISTORS will proball be different type....

you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted
pictures on, check out page 3
http://www.techlore.com/forum/thread/16736/Magnavox-51MP392H-17-51-quot--TV-has-double-vision/

Where I got my parts that worked:
Suburban Electronics
http://www.suburban-elect.com/
Manual Library you should find all you need here:
http://www.techlore.com/group/2/list_downloads



What you need:
(2) STK392-120 OR STK392-150 IC
chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux

Nov 20, 2008 | Mitsubishi WS-65909 65" Rear Projection...

1 Answer

Toshiba 42h81


STK392-110 's = replace with Toshiba or Sanyo quality only..
What was the location & value of the resistor ?
An IC, if shorted internally,can prevent the tv from powering up..
Re-check soldered in 5 amp micro fuses F850,851,852,etc
Fix it ! ..............................T.

Aug 28, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Problems after new ic chip install


Did you check for open resistors in the convergence circuits? Often that is what happens when the old ICs wear out it will cause a couple resistors to burn open, and they show no outward sign of being bad. Also double check the IC pins connections for solder bridges thats another common problem, I always use a magnifying glass to double check my solder when ever I do convergence or any IC work where the pins are close. But with the streaks youre describing I would think maybe resistors.

Jun 16, 2008 | Apex Digital GB55HD09W 55" Rear Projection...

1 Answer

Phillips 60pw9363 Which IC is red and which is blue


Thats the DPTV 335 series chassis when the IC blows it will usually take out 1 or 2 6.8 ohm resistors along with it. Look at the resistors right next to the ICs you will notice 1 or 2 with a little discoloration in the middle replace those and your set should be back to working just fine. Let me know if you need more help. These resistors are easy to spoy they all look alike and shouldnt have any bands on them they will be stamped 6R8 ohm 1W J

Apr 12, 2008 | Projection Televisions

1 Answer

JVC AV-48WP30 will not give a picture


Replace the convergence IC`s again using original Sanyo chips (STK 392-110 or STK 392-180). Make sure to use plenty of heat sink compound. Coat the entire back side of the chips. Also look to see if any of the low ohm resistors are burned. A shorted chip will cause the thumping sound and the set will shutdown. I am guessing that you used generic IC`s as a replacement. They are cheap and the leggs fall off when you apply too much heat during soldering. Dont wory about the CRT driver or the deflection board, they are probably fine.

Dec 12, 2007 | JVC AV-48WP30 48" Rear Projection...

Not finding what you are looking for?
Toshiba 43H70 43" Rear Projection Television Logo

Related Topics:

51 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

68153 Answers

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

Answer questions

Manuals & User Guides

Loading...