Question about Toshiba 42H81 42" Rear Projection Television

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Convergence red red lines arround objects on left and right of center. tried auto focus came back error. tried to use manual grid couldn't change red on left and barely on right. read about the convergence ic's stk392-110 they look hard to get to much less replace. Thanks Charles K

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The only way to fix the problem is to replace the IC's and when you do, replace them with STK392-120 instead of STK392-110. It's not a hard job if you're patient and label everything well (knowing how to solder and unsolder helps alot as well) - Good luck!

Posted on Sep 28, 2009

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I have a samsung SL502 and it started showing grid like lines on my screen- how can I get those off?


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"Perfect Focus" problem on Samsung HCN4727W


You have a bad sensor, a bad digital convergence board, or the new board is not working correctly. I would start by swaping out the convergence board or exchange it for another one. Good Luck

Nov 08, 2007 | Televison & Video

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Convergence issue; red 3D effect. In grid convergence mode blue will converge w/green fixed lines and red horizontal will but the verticle red will not adjust far enough left to converge. has ajustment...


Convergence is dead.Must know how to solders?Must replaced ICS and all of it resistors.Tries Tv repair World.com,Tvrepairkits.com for a convergence kit.The shop will cost u $300 for parts and labors.

Jan 24, 2010 | Hitachi 43FDX01B TV

1 Answer

Hitachi 53UWX10BA dynamic convergence works but blue is blurry


I know this set very well---you are saying convergence adjusts ok everywhere? If you understand that the blue is usually de-focused a little----there are only two ways to adjust the focus of each tube-----

1.) Behind the front speaker grill there is an inspection plate---with it removed you will see a small black plastic block with 6 controls on it; it is the MASTER SCREEN/ FOCUS BLOCK

2.) THREE of the controls left to right are Screen controls(red, green and blue) and the other 3 are FOCUS--IT IS ALL black and you need to look close to identify which is focus and which is screen---you are looking for the BLUE focus control(one of the 6)

3.) With the convergence grid on screen cover the RED and GREEN lens in the set and try to adjust the focus of the blue(I presume you know how to put the set into the Convergence mode?

4.) The only other way to adjust the Blue focus is from the back of the set---with the Red and Green lens covered up place a blanket over the top of the set that covers the whole screen--from the back of the set you will note that all three of the black focal lens have a wing nut---with the convergence grid up and only blue lines present(Green and Red lens covered with a cloth) look from behind the set at the grid---loosen the wing nut on the blue lens and slowly slide the lens left or right until the blue has the best focus possible----if it will not adjust with the focal lens or the front focus control you have a circuit problem.

I do this here for free and if this information helps you take a minute and give me a vote here. If you have any questions or need advice reply to this posting here and I will assist you.

SD TECH

Sep 14, 2009 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

Red is out of convergence


You can repair it yourself by replacing both STK392-110 Convergence ICs. You can get replacement ICs at the following link with free instalation instructions . Heres the link.
http://servicemanuals.vstore.ca/

Aug 08, 2008 | Toshiba 65HDX82 65" Rear Projection...

2 Answers

Red is out of convergence


These sets use STK392-110 voltage amplifiers in the convergence circuit. Chances are good that these are causing your problem. It is best to upgrade these to STK392-150. There may also be some low tolerance resistors that have gone off value. I do not suggest, however, that you do this work yourself unless you have some electronics training. Find yourself a good technician that does component level repair and not board level. The labor will be higher, but the parts will be significantly lower.

Aug 05, 2008 | Toshiba 50HDX82 50" Rear Projection...

1 Answer

The red projection tube won't focus


Set needs convergence ic's changed and possibly a few small 1/4 watt resistors. Parts have to be desoldered/soldered into circuit board and test equip.(ohm/ volt meter) is required. Most repair shops do this repair for 175.00-375.00 Hope this was helpful. Russmann

May 21, 2008 | Hitachi Televison & Video

1 Answer

Convergence issues


Drifty convergence IC's need replacing..located on center PC board......STK392-570...change them both for reliability...T.

Feb 28, 2008 | Mitsubishi WS-65809 65" 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

Colors out of alignment; curved lines


this sounds like a convergence issue.. one thing you are going to want is a good test dvd.. avia - guide to home theater or video essentials are two very good ones. anything that will supply you with test patterns and let you pause on them will work.

you will need to get into the service menu, using your remote press DISPLAY, 5, VOL+, POWER in quick sequence. once the screen comes up you should have green letters and numbers at the top of the screen. at this point, keys 1 and 4 change the item, keys 2 and 5 change the category, keys 3 and 6 change the value, mute enters write mode, enter executes it.

you will want a test pattern displayed that has a center point, enter the pje section of the menu and go to tphp, if you don't see a crosshair, press 6. you are going to want the convergence grid and the test pattern displayed simultaneously, so press 9 until both are on screen. it will be a crosshatch pattern overlaying your test image. use the joystick button (left or right) to roughly line the crosshatch up with your test image.

now go to tpvp and use the joystick (up and down) to finish lining things up. once you are happy with the changes, hit mute then enter to save it to memory.

this next part is from a tweaks file in the public domain that i have for this model and use any time i am working on one of these.

How to Enter the Convergence Mode
Once you're in the service menu, you need to access the convergence mode. Press the 2 or 5 key until you see PJE in white blocky letters (you should be able to get there quickly by pressing 5 once or twice). Now press 9 on the remote. You will see a bracket appear in the middle of the screen. Press 6 and cycle through the different types of patterns until you get a white grid on a black background.
Controls
Once in the convergence mode (activated by pressing 9 in the PJE section), the buttons on the remote work differently. Keys 1 and 4 move the cursor around on the grid (convergence points) in a spiraling fashion. The joystick on the remote will adjust the position of the current color at that grid point. Key 3 cycles between red, green, and blue adjustments.
You may also depress the joystick, which will allow you to move the bracket freely around the grid. Press it again and you are back to being able to adjust the position of the current color at that grid point. Handy if you are just touching up an area and don't want to spiral through all the points.
How to Converge the CRTs
It's much easier to converge the set if you can see what you're converging. Green should be the color to converge to. The geometry (straightness of the grid) of the green CRT should be good enough - If you notice that some lines are definitely out of whack, you should straighten them.
We need to disable the red and blue CRTs. Press 2 until you get to the 2150P-2 category. Cycle through the items until you get to RGBS. Change the value to 2 (Green CRT Only).
Move back to the PJE category by pressing 5. You should be back at the grid with a green bracket - If you don't see one, press 3 until you do (the bracket may have been set on red or blue, which have been turned off). Navigate around the grid, correcting any obvious errors. Once you're satisfied, turn the red CRT back on (RGBS value of 6, Red and Green CRTs on), and return to the grid. Press 3 until the crosshair is red. Now, align the red to the green, getting as close as you can. By the way, not all grid points are selectable. Keep in mind that the edges of the screen will tend to be more out of focus, and harder to get "tight". Get it as close as you can. You also may notice that some points affect the position of other, nearby points. You'll get the feel for it after a short period of time. Now, do the same for blue, making sure to turn off red (RGBS value of 3, Blue and Green CRTs on). When you're all done, turn all the CRT's back on (RGBS value of 7, All CRTs on), and look to see the results. Touch up where it is needed (if needed at all).
I found the 100 IRE Crosshatch image really showed areas that still needed convergence. I would cycle within the PJE category (pressing 6) between the convergence grid (to fix errors) and the 100 IRE Crosshatch image (to view areas with convergence problems).
Save your convergence to memory by pressing MUTE followed by ENTER.
Remember, you need to do this for each mode you use - This doesn't mean for each input. It applies to 4:3 mode, 16:9 mode, and 1080i 16:9 mode (even though 1080i is a 16:9 mode, it requires its own convergence due to the higher scan-rate). Each mode is separate, and is saved separate, however, each one does tend to affect the other slightly.
Try not to use the Flash Focus. I know it's very easy to use, and they put it right there on the front of the set, so it basically begs to get pressed. But realize that pressing Flash Focus will rely on the sensors to converge your set - It will pretty much re-do all your hard work. It may get close, but it will never be as good as a service mode convergence.
Now that your convergence is done, you should re-register your new convergence to Flash Focus (FF). Ryan says below don't use Flash Focus, and I agree. However, if you do or someone else does, it shouldn't require nearly as much touching up if the new convergence is re-registered to Flash Focus. This is simple to do. While in the PJE category, press the Flash Focus button to initiate a re-registration process to the system. If the operation fails (I've never had this happen), press 0, followed by ENTER to restore the convergence settings you last saved. You'll need to investigate why it did not work. In the PJE category, change to item ERR and it should read a value other than 000 if your attempt at re-registering FF didn't work. If our attempt at re-registering did work, it should read a value of 000. Typically, reasons why re-registering FF won't work are due to overscan being reduced too much but there are other reasons too. Regardless, while you are investigating just don't press FF and you'll be fine.
I have read numerous forums regarding re-registering flash focus. Most say only re-register flash focus in Full. This is what I did. I only watch TV in Full mode anyway, so it worked well. I have read many people having troubles with other modes if they re-register flash focus in Wide Zoom mode so I can only say, read forums and ask questions if you do use your set in other modes before you re-register your flash focus in another mode besides Full.


hope this helps you,
trin

Nov 15, 2007 | Sony KP-51WS500 51" Rear Projection...

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