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Friday, September 07, 2007

How to fix convergence problems using Flash Focus on Sony Projection TVs

With projection televisions, and specfically Sony Projection TVs, occassionaly convergence will get out of alignment on the televisions sets causing blurriness or pictures to be outlined with blue, red, or green coloring. Convergence is the focusing of three images into a single image. If you are having an issue with convergence on your Sony Projection TV, then this would most visible around white lines on the screen that can have a colored halo effect around them.

This guide will show you how to fix a convergence issue automatically using Sony's built-in Flash Focus (or FlashFocus) feature which will automaticaly diagnose, test, and adjust the convergence for your projection TV red, blue, and green bulbs.

As mentioned earlier, the projection tube image appears on the screen in three colors (red, green and blue). If they do not converge or focuses, the color is poor and the picture blurs.

Before you use your projection TV, be sure to adjust the convergence.

The FLASH FOCUS feature allows you to adjust the convergence automatically. Here is how you use it.
1. Turn on your TV and receive a signal or program for 30 minutes.
2. Press Flash Focus

The cross pattern shown below appears and FLASH FOCUS begins to work. The adjustment is completed when the cross pattern becomes white and you are returned to the program you were watching.

As mentioned before, it is recommended to perform FLASH FOCUS about 30 minutes after the projection TV is first turned on. Additionally, you cannot perform any other functions until FLASH FOCUS has completed the cycle. Also of importance, if you perform any other operation while FLASH FOCUS is in progress, FLASH FOCUS operation is canceled.

Finally, on an important note - unshielded speakers or other metallic objects can cause picture distortion if placed close to the projection TV and may dramatically impact the quality of your Sony Projection TV picture.

This guide may also be compatible with the following Sony Projection TV models:
KDF-37H1000
KDF-42E2000
KDF-42WE655
KDF-46E2000
KDF-46E3000
KDF-50E2000
KDF-50E3000
KDF-50WE655
KDF-50X30
KDF-55E2000
KDF-55WF655
KDF-55XS955
KDF-60WF655
KDF-60XBR950
KDF-60XS955
KDF-70XBR950
KDF-E42A10
KDF-E50A10
KDF-E55A20
KDF-E60A20
KDF-E60A20PKG
KDP-51WS550
KDP-51WS655
KDP-57WS550
KDP-57WS655
KDP-57XBR2
KDP-65WS550
KDP-65XBR2
KDS-50A2000
KDS-50A2020
KDS-55A2000
KDS-55A2020
KDS-55A20L1
KDS-60A2000
KDS-60A2020
KDS-70Q006
KDS-R50XBR1
KDS-R60XBR1
KDS-R60XBR2
KDS-R70XBR2
KF-42WE610
KF-50WE610
KF-50WE620
KF-50XBR800
KF-60DX100
KF-60WE610
KF-60XBR800
KP-41T15
KP-41T25
KP-41T35
KP-41T65
KP-43HT20
KP-43HT20C
KP-43T70
KP-43T70A
KP-43T70C
KP-43T75
KP-43T90
KP-46C36
KP-46WT500
KP-46WT510
KP-46WT520
KP-48S65
KP-48S70
KP-48S75
KP-48V75
KP-48V80
KP-48V85
KP-48V90
KP-5000
KP-51HW40
KP-51WS500
KP-51WS510
KP-51WS520
KP-53HS10
KP-53HS20
KP-53HS30
KP-53N74
KP-53N77
KP-53S65
KP-53S70
KP-53S75
KP-53V15
KP-53V75
KP-53V75C
KP-53V80
KP-53V85
KP-53V90
KP-53XBR200
KP-53XBR300
KP-53XBR45
KP-57HW40
KP-57WS500
KP-57WS510
KP-57WS520
KP-57WV600
KP-57WV700
KP-57XBR10W
KP-61HS10
KP-61HS20
KP-61HS30
KP-61S65
KP-61S70
KP-61S75
KP-61V75
KP-61V80
KP-61V85
KP-61V90
KP-61XBR200
KP-61XBR300
KP-65WS500
KP-65WS510
KP-65WV600
KP-65WV700
KP-65XBR10W
KP-7200
KWP-65HD1

18 comments:

Alejandro said...

Hi, I was wondering, the KF 42WE610 doesnt have a flash focus function on the remote, how can I fix teh convergence of the display?? on the bottom it seems blurry but on the top its ok, what sohould I do?? thanks

Ken Hanscom said...

Hi Alejandro, unfortuantely no direct experience with the KF-42WE610, perhaps another reader this page can direct you to the right solution for your problem with the blurry adjustment for convergence.

Bubba said...

I have a Sony KP-65WV700 and We had a repair done about month ago where there was an issue of red curved lines on the TV and it had to be opened up and fine-tuned so that the red line would nolonget be visible. Now we this problem of Red, Blue & Green outline (Halo) around everything in the picture, Tried the Flash Focus but this did not resolve the issue. Was wondering what else I could try?

Anonymous said...

BUBBA DID YOU EVER GET THAT FIXED IM HAVING THE SAME PROB ON MY SCREEN PURPLE AND BLUE HALO AROUND EVERY IMAGE........

J said...

Yep...me too. I have tried the flash focus, the interior color adjustments on the black box...and still having "halo" of red/green around especially white letters on the TV..

Any ideas?

Any help would be greatly appreciated!

devrichards said...

I have a problem with my kp61s65. The
focus is out and i adjust the convergence got the middle ok but the
corners are way off. Do this Model have flash focus? Do anyone has the service manual? and any suggestions? My email add is mardad_01@hotmail.com

Anonymous said...

I have a KFE42A10 and I'm not sure if this is the same problems as the rest but the whites are really whites - sometimes if it is a very bright screen anything that is white or light in color is washed out. The picture tube light isnt flashing...is this a TV problem or my cable input? I would hate to buy a new picture tube to find out that it wasnt the tube...any thoughts appreciated...

email to jhao72@yahoo.ca or this website response

Anonymous said...

There is a red and blue haze at the very top of my screen. Not so bothersome on darker screens but when the screen is white it is very visible.
No Flash Focus on this TV either.

Seems to be slowly creeping down the screen.

icerunner said...

SORRY HAD TO HELP, THIS WAS BORROWED FROM "TECHLORE"

http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/

There has been a large amount of chatter on Techlore about Sony convergence ic problems. Luckily Most Sony projection tv's no matter what model you have should be similar to my explanation below, Since Sony rarely fully re-engineers a tv what I am about to say will apply to most Sony projection TV's. A service manual is generally not needed to perform the repair.

WARNING! If you don't have any electronic experience this is not for you, I assume no liability for any harm that may come to you or your tv. Perform this procedure totally at your own risk. High Voltages exist in your tv and on the boards I am going to talk about, and can have high voltages on them even after the tv is unplugged.

What has happened to your tv:

What has normally happened is that the convergence output driver ic's either one or both of them has shorted. Causing your picture to be un-converged, The Symptom of your failure can take on many different looks, so one explanation of what the failure looks like will not be adequate. It will be basically one or more (red,Green,Blue) crt's are not aligned correctly, and colored shifted, and distorted picture of some kind will be seen. Auto focus will not fixit and may even make it worse. When these ic's short, they can cause one or more pico fuse to blow. Allot of people ignore this part of the repair and get themselves into trouble. Please listen to my warning, and make sure you check these fuses!

About the boards:

The two boards we will be working with are the "D" and "G" boards. They will have a big "D" or "G" stamped into them. On most models the "D" board will be to the center left of you when looking from the back. The "G" board will usually be to the left of the "D" board and standing vertically. When removing the board make a mental note of where all the plugs go. The Flyback (the big gray transformer near the back) has a fat red wire coming out of it. To remove this wire push down and twist on the distribution block side. Don't try to remove it from the flyback side, you can damage the flyback. There is a focus wire going upto the focus block as well, pull the wire straight out of the focus block side. But if you have enough room to work behind your television you can leave the red and focus wires in the tv, just flip the board over at the television after removal.

The Parts:

The parts you will need are two ic's that are referred to as STK ic's. This is in reference to the first three letters of the part number. You will also need some pico fuses. The pico fuses are little yellow fuses that look like resistors. When they blow, they will show no physical sign of failure. The amperage rating will be printed on the fuse. For example a 5 amp fuse will have the number 5000 on it. A 3.15 amp fuse will have the number 3150 on it. You will need to use an ohm meter to test these fuses.


If your set uses either STK392-110, or STK392-120, you should replace them with a higher wattage part; either the STK392-150 or STK392-180. Since this is a very prolific problem, there are allot of companies that make cheap bad ic's that can be purchased usually for around $6.00 - These replacement ic's are BAD, they will FAIL on you again. I have had allot of experience with this problem, please listen to my warning! Only get a set that is from a reputable manufacturer. If your ic part number is something other than the ones I mentioned above, ONLY use the EXACT same part number for replacement. The part number is boldly printed on the part.
The Location of the parts;

The stk ic's are on the "D" board, attached to large heat sinks, When looking from the back you can see the heat sinks but the part's themselves will be pointing away from you and hard to see without removing the board, or using a mirror to look at the part numbers. The fuses are generally located under the fins of the heat sinks. There are several of them and vary by model. On the "G" board there will be two yellow pico fuses near the connector going to "D" board. These fuses provide power to the stk ic's you must check these as well.

The Repair:

When replacing the STKs make sure you use heat sink compound on the back of the ic's before installing them. Also as a rule of thumb, screw or clamp the ic's down to their heat sinks before you solder the pins. Replace any blown pico fuses and re- install your boards. When you turn your set on it may still be out of convergence due to many factors. Try pressing the auto focus button on front of your set. If this does not work, you will need to do a convergence. Please see my article "Sony Convergence Procedure" to complete this part.

Possible Problems after the repair;

Many things can happen during your repair, the most common problem and one that even I - an experienced tech still have problems with are not plugging in all the wires. This will cause various strange problems. So if the set acts differently than It did before. First suspect that you have missed a wire. Don't assume that you got all the wires in. it is extremely easy to miss one. I have had people and techs tell me "I am sure I plugged in all the wires" but when I investigate a little further we find that wire that was hidden behind something else and once we plug it, all will be well. Another issue you need to be aware of is if you are in convergence mode and you cannot move one of the colors in either vertical or horizontal directions. Re-check you pico fuses and solder. 99% of these problems are due to either shorted pins or a missed pico fuse.

Anonymous said...

I have a kp-57wv600

I am removing boards to fix rec convergence prob--I found the large D board. Trouble finding G board--this site said it was "The "G" board will usually be to the left of the "D" board and standing vertically.". There is no board of any kind to the left--there are 3 vertical boards to the right--AD,B,M(mounted on A horz). To the extreme right is a horz. board marked G.--there is no Vertical G.

I downloaded diagram of this unit and it states the right horz board is the G board--

Pls let me know if this is correct--ready to pull and repair--It is difficult being Polish--

Anonymous said...

Guys, "Flash Focus" is just a starting point. You should go into the manual convergence (such as in the WV700 models) and fine tune it. Flash Focus is far from perfect, but it gets you in the ball park. Look in your manual on how to get to the manual convergence, but once there, you can generally set 30 or so points on your screen to be perfect.

Also note that you should let your TV warm up at least 30 minutes before doing any convergence work, including Flash Focus.

Anonymous said...

Hi Ken,

I tried to fix the convergance manually on my KP57WV600. NOTHING happens on the screen by remote. All green, red and blue + signs stay the same. Please guide.

Thanks,

Shahid
shahidhussain30@gmail.com

Leonardo said...

I have a KP-65wv700 that has the bow tie effect (the 3 colors not converging and narrower on the center than on the sides) I already change the 2 STK 392-560 ICs for new ones and the pico fuses that were blown on the other board and I also checked the transistors next to the STK chips, but after putting everything back together I still had the same problem.
I went over all the soldering done and re-checked the pico fuses and all connections and everything seems to be the way is supposed to, but when I turn the TV on I still have the problem.
Flash Focus doesn't work, and manual convergence from the regular menu doesn't work either.
I went into the service menu, but the codes that you provided for most Sony CRTs don't show up in mine.
I want to manually try do adjust the convergence from the service menu after changing the ICs but I don't know how to access them once inside the service menu.

Can you tell me how to do that once inside the service menu?

Leonardo said...

I was able to get the service manual, went into the service menu and tried to fix the pincushion effect.
When I press the buttons on the remote the values on the screen change, but it doesn't have any real effect on the screen towards fixing the problem.
Everything seem to be well connected, soldered and according the measurement receiving power.
I still have the pincushion effect as well as the 3 colors not converging. I can't converge the color using the regular menu or the service menu.
PLEASE HELP ME!!!

Anonymous said...

i tried using flash focus on my kp-53HW40 the blue, and the green cross move, but the red seems to just move suddenly and mnove on to the next color. is this a bad sign?

Anonymous said...

Below mentioned steps did not resolve problem on my sony KP-51WS510 model.
I was told convergence chip set STK Pack 392-560 has gone bad!
Can someone tells me how much it costs and what would be the reasonable price to get it fixed?
I am getting high price for fix?

Thanks

Anonymous said...

It is about $350 if you take it in. You can buy a repair kit and do it yourself for about $80. If you are still watching this TV in 2011 You may want to consider a new flat screen.

Jimmy Green said...

Me too I need help