Question about Sony KP-43T90 43" Rear Projection Television

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Convergence where is the convergence panel located kp43t90 it does not seem to be noted in the service manual,or does it go by another name.would a de solderingtool also be helpfull

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  • nozz shaw Mar 07, 2007

    the convergence setting did not help.still have blue shadow/ghost.
    i dont mind trying to fix this problem myself if i get the correct guidance as i am bored out of my head right now the tv is a 2001 so im not too bothered if it blows up.i have some minor electronic experience.any help welcome

  • nozz shaw Apr 02, 2007

    i found only one ic on the board a 16 pin
    i have a picture of the board if you know where
    i can post it

  • nozz shaw Apr 02, 2007

    kp-43t90 board

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You will probably need to replace the convergence output IC's which are on the "D" board. The D board is on the left hand side with the back off and you can't miss the outputs as they are 17 pin SIP amplifier IC's facing the front of the set. They occupy the largest heat sink. Check your fusable links as well locations usually marked PS8xxxx.

Posted on Mar 07, 2007

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Exit mode service


For more details type in this site name "Electro-help" (DO NOT copy and paste the site name from here. Doing so may lead you to wrong place) to search box of your search engine [not in the address bar of your browser], and press "Enter".

It is an electronic equipments service help site.

Note the position of hyphen in between words in site name. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts.

You can locate this site, either at the bottom part of first search page, or at the top of second.

Detailed descriptions are there to help you.

Jun 06, 2012 | Panasonic TH-42PX500U 42 in. Plasma...

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Control remoto de Toshiba Regza.


For more details, just type in the site name "Electro-help" to your search engines' search box [not in the address bar of your browser], and click search. It is an electronic equipments service help site.

All details you want are there. Note the position of hyphen in between words in site name, when you type it in. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts. You can get all details.


You can locate it either at the bottom part of first search page, or at the top of second page. Detailed descriptions are there to help you.

Sometimes, clicking on advertisements by the side and bottom of each post might help you to get details about the availability of spare parts; price etc:-


Jun 04, 2012 | Toshiba Televison & Video

2 Answers

Sony kp-53xbr45 please let me know step by step how to enter convergence service thank you


Hello,

To enter into the convergence service of your sony, follow the steps below;
  1. Press "Menu" on the remote control. Use the up- or down-arrow button to move the cursor to "Setup" and then press "Return."
  2. Use the up or down arrow to move the cursor to "Convergence" and press "Return." This will bring up the convergence-adjustment screen.
  3. Press the up or down arrow to move the cursor to the line you want to adjust (either vertical or horizontal for red and blue) and press "Return."
  4. Press the up or down arrow again to move that line until it converges with the center green line and press "Return."
  5. Repeat to adjust the other lines until all three lines converge and are seen as a white cross.
  6. Press "Menu" to exit the convergence menu and return to the original screen.
You can as well follow these steps;
  1. Press the "Power" button to turn your TV on.
  2. Wait at least 30 minutes before you adjust the convergence in your television. This allows your TV ample time to warm up before you make the adjustment.
  3. Turn your TV to a cable channel or to an antenna channel with a picture that you can see. A music channel with a static shot of music notes isn't the kind of picture you need. Instead, look for a picture like what you would see on a movie, sitcom or drama.
  4. Press the "Flash Focus" button located in the front panel on your TV. You may need to open a hidden compartment on the front of your TV to access this button. The convergence will repair itself automatically after you hit this button. It may take several minutes.
Any of the two processes are detailed steps on how to enter your convergence service.

Take care

Jul 03, 2010 | Sony KP-53XBR45 53" Rear Projection...

1 Answer

KP43T90 ALL LAMPS IS OK THE SCREEN IS BLK


screen is black light is steady red willnot turn on

Jan 27, 2010 | Sony KP-43T90 43" Rear Projection...

1 Answer

Picture is showing double visions


Hi.

That means that the convergence ICs must be replaced.

The convergence ICs are two power amp chips located in convergence board. They must be de-soldered and replaced with new ones. Resistors in convergence board must also be tested and eventually replaced.

The job is about $250/$300 and must be done by a technician.

To get a quote on repair, call Sony at the number listed on the owner manual.

Dec 13, 2009 | Sony Televison & Video

1 Answer

Picture shaped like a bowtie, (shrinking)


Hello, This is your classic convergence Amplifier IC problem. Here is a way to deal with it. These are generic instrustions: 1) Get the schematic/service manual for this TV (You will need it because it contains the part numbers and component values you will need for replacement) 2) On the schematic/service manual locate the convergence amplifiers (STK392-110, 120, 150) and the biasing resistors (Write the resistor values down from the schematic) 3) Unplug the TV and remove the rear cover to expose the electronic circuitry. 4) Using the schematic/service manual find the physical location of the two convergence amplifiers (Usually attached to a big metal silver in color heat sink) (Basically it will look like two big black six sided flat modules with a lot of pins on the bottom (18-22 to be exact)). 5) After finding the heat sink and amplifiers remove the screws or the tension bar holding the amplifiers in place. 6) Using a soldering iron and a de-soldering device (either a de-soldering pump or de-soldering wick) remove the solder from the pins of the amplifiers and biasing resistors that protrude from the solder side of the circuit board. (Take into mind that you may have to remove the board in order to do this, use the instructions in the schematic/service manual to do this, and make sure you mark everything you remove to make sure you have a guide as to how to put it back) 7) After removing the solder from the pins off the amplifiers and the biasing resistors, remove the resistors making a list of the value, part number, and location on the board (all of this should be in the schematic/service manual). Then remove the two convergence amplifier modules taking care so as not to damage the circuit board. NOTE: The heat sink compound (the white goopy stuff) may have hardened and caused the module to stick to the heat sink, you will have to gently pry the module away from the heat sink, I have used a light application of isopropyl alcohol to dissolve the heat sink paste. 8) Once the modules are loose from the heat sink, you can gradually remove them from the circuit board. 9) Clean the heat sink off by using the alcohol and a heavy paper towel (remove all of the heat sink paste, and yes this is messy) At this point you have removed the two convergence amplifier modules and the biasing resistors and cleaned the heat sink. Now you will have to use your schematic/service manual to find the part locations, values and numbers you will need to replace the old parts I suggest replacing the biasing resistors first. 1) Sort out the resistors you will need and as stated in the schematic/service manual and replace them according to the schematic/service manual locations and part numbers. 2) Solder the components (resistors) in place making sure not to short out anything in the process. 3) Apply heat sink paste to the metal side of the modules one at a time and the put the modules into the circuit board lining up the screw holes of the modules with the screw holes in the heat sink, use the removed screws or tension bar to hold the modules down once in place in the circuit board and on the heat sink. 4) Solder the pins of both amplifier modules to the circuit board, taking care not to short out anything. 5) Reinstall the board to the TV, reconnect all cables removed (DOUBLE CHECK EVERYTHING) If all went well the convergence amps should be working, and you will need to realign the convergence of your TV, I suggest using the AUTO Convergence feature of your TV (Use the instructions in the schematic/service manual). All should be good now. Now these instructions are generic in nature but can be use for a number of Models of Projection TVs. In addition to this also make sure your Yoke transformers on your CRTs are functioning as they should, check the voltages applied to them. I hope this helps, Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Jun 10, 2009 | JVC AV-56WP30 56" Rear Projection...

2 Answers

Convergence problem


Hello nursecmp,

You have a convergence amplifier problem. Now you have two choices: 1) fix it yourself or 2) Get it fix by a qualified TV repair person. Granted if you choose the latter, you will spend about $200-$500 depending on the shop. So as you stated you would want to do this yourself. OK, I will not get into the problems with this, rather I'll give you the basic procedure and the you can search fixya for a more in depth solution (I'll show you how to do this after the basic instruction on how to replace the Convergence Amplifiers (I rarely give these instructions) Here goes:

1) Get the schematic/service manual for this TV (You will need it because it contains the part numbers and component values you will need for replacement)

2) On the schematic/service manual locate the convergence amplifiers (STK392-110, 120, 150) and the biasing resistors (Write the resistor values down from the schematic)

3) Unplug the TV and remove the rear cover to expose the electronic circuitry.

4) Using the schematic/service manual find the physical location of the two convergence amplifiers (Usually attached to a big metal silver in color heat sink) (Basically it will look like two big black six sided flat modules with a lot of pins on the bottom (18-22 to be exact)).

5) After finding the heat sink and amplifiers remove the screws or the tension bar holding the amplifiers in place.

6) Using a soldering iron and a de-soldering device (either a de-soldering pump or de-soldering wick) remove the solder from the pins of the amplifiers and biasing resistors that protrude from the solder side of the circuit board. (Take into mind that you may have to remove the board in order to do this, use the instructions in the schematic/service manual to do this, and make sure you mark everything you remove to make sure you have a guide as to how to put it back)

7) After removing the solder from the pins off the amplifiers and the biasing resistors, remove the resistors making a list of the value, part number, and location on the board (all of this should be in the schematic/service manual). Then remove the two convergence amplifier modules taking care so as not to damage the circuit board. NOTE: The heat sink compound (the white goopy stuff) may have hardened and caused the module to stick to the heat sink, you will have to gently pry the module away from the heat sink, I have used a light application of isopropyl alcohol to dissolve the heat sink paste.

8) Once the modules are loose from the heat sink, you can gradually remove them from the circuit board.

9) Clean the heat sink off by using the alcohol and a heavy paper towel (remove all of the heat sink paste, and yes this is messy)

At this point you have removed the two convergence amplifier modules and the biasing resistors and cleaned the heat sink.

Now you will have to use your schematic/service manual to find the part locations, values and numbers you will need to replace the old parts I suggest replacing the biasing resistors first.

1) Sort out the resistors you will need and as stated in the schematic/service manual and replace them according to the schematic/service manual locations and part numbers.

2) Solder the components (resistors) in place making sure not to short out anything in the process.

3) Apply heat sink paste to the metal side of the modules one at a time and the put the modules into the circuit board lining up the screw holes of the modules with the screw holes in the heat sink, use the removed screws or tension bar to hold the modules down once in place in the circuit board and on the heat sink.

4) Solder the pins of both amplifier modules to the circuit board, taking care not to short out anything.

5) Reinstall the board to the TV, reconnect all cables removed (DOUBLE CHECK EVERYTHING)


If all went well the convergence amps should be working, and you will need to realign the convergence of your TV, I suggest using the AUTO Convergence feature of your TV (Use the instructions in the schematic/service manual).

All should be good now.

Now these instructions are generic in nature but can be use for a number of Models of Projection TVs.

Jul 18, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

KP43T90 convergence


Check the resistors that are right next to the ICs one or two of the resistors will usually go open along with The convergence ICs.

May 10, 2008 | Sony KP-43T90 43" Rear Projection...

3 Answers

Fine tuning grid on my Samsung HDTV with remote.(BP59-00048)


To adjust manual convergence on your projection TV, follow theses steps:
  1. Turn your TV on.
  2. Let it warm up for 30 minutes.
  3. Press the Menu button on your remote. The Main menu appears.
  4. Use your remote to select Function, and then press the joystick.
  5. Select Convergence, and then press the joystick. The Manual Convergence screen appears.
  6. Select Red, and then press the joystick. A series of crosshairs appears on the screen.
  7. Select one of the outside crosshairs by moving the joystick up/down/right/left or by pressing the 2 (up), 4 (left), 6 (right), or 8 (down) buttons on your remote. The method you use depends on the model of remote you have. Note: You must do the outside crosshairs first.
  1. In the crosshair you selected, if you can see a horizontal red line, use the CH up or CH down buttons to move the line so that it is superimposed on the horizontal center line of the crosshair. Note: Make the single horizontal line as white as possible.
  1. In the crosshair you selected, if you can see a vertical red line, use the Vol + or Vol - buttons to move the line so that it is superimposed on the vertical center line of the crosshair. Note: Make the single vertical line as white as possible.
  1. Repeat for all outside crosshairs, and then for the inside crosshair.
  2. Return to the Manual Convergence Screen, and select Blue, and then press the joystick.
  3. Repeat Steps 7 through 10 for Blue.
  4. Press the Menu button on your remote to exit.
Important: The directions above work for most Samsung Rear Projection TVs. Yours may be different. For exact directions to perform manual convergence, see your user's manual. If you don't have your user's manual on hand, click HERE to view your manual on line.
If you cannot get your Projection TV to converge, it may need to be serviced. To arrange a service appointment, call Samsung Customer Care at 1-800-Samsung (1-800-726-7864). Have your TV's model number and serial number on hand when you call.

Jan 05, 2008 | Samsung BP59-00016A Remote Control

1 Answer

Convergence Problem


you nid change the [stk] of comvergency and chek the resistors tha sorce de negative -volts -28 or -30 many times thises resistors is open!good loouk [disculpa mi falta de ortografia mi primer idioma es espanol saludos!efrenhd@aol.com.

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