Question about Sony KP-51WS500 51" Rear Projection Television

1 Answer

Colors no aligned

I have a Sony Projection TV Model# KP51WS500

I have noticed that over the last few weeks while watching a cable channel we loose focous. If I changed to a different channel (nondigital) it would look the same. If I changed to a HD channel it would look just fine. So while on the basic cable channel I hit the flash button and it fixes the problem.

Now every station and every input on the tv is out of alignment. Red, green and blue seperation. After pressing the flash button the picture does not get better.

I have also noticed blue rainbows going across the screen. After reading posts here I adjusted the blue voltage knob and cannot get rid of them.(this is not as big a deal to me as the color seperation)

Also after reading some more posts I have pulled the d and g boards and tested all the pico fuses.( 2 on the g board and 7 on the d board)

Both IC's are marked STK392-560 (b2f21)

Does it sound like just the IC's need to be replaced? or just adjusted in the convergence menu?

Posted by on

  • 1 more comment 
  • brendan_chin Nov 30, 2008

    what does in big size and dry solder joints mean(joints w/ little to no solder). Thanks,

  • brendan_chin Dec 01, 2008

    I have found the a site that sells the ic's and they offer stk392-560 & 570. Should I go with the 570 it is a little less expensive or should I stick with the 560.

    I downloaded the service manual and tested all the resistors and they all seem to check out ok.

    Thanksfor your help

  • brendan_chin Dec 13, 2008

    I have finally received the parts directly from Sony. $80 with tax and shipping. I replaced the 2 convergience IC's and while holding my breath turned on the tv. Holy ****, the picture looks great. Thank you very much for all your help.

    While flipping channels using my cable box (connected through the digital hdmi (I think)) the colors turn from looking great to almost black and white. I was on a non hd / non digital channel. Then I changed to another non hd / non digital and it looks the same, I changed to a HD channel and the colors were fine.

    Do you know what might cause this? I do not have any error code flashing on the front of the tv?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 10,594 Answers

Hi Chin,
Please check faded color resistors (in big size) on D board and also check dry solder joints on D board.
If above seems OK then ICs STK-392-560 are suspected and needs to be replaced.
Let me know if you need further info.

Posted on Nov 29, 2008

  • Shahid Electronics
    Shahid Electronics Dec 01, 2008

    Please use Sony genuine parts as per related service manual when need to replace.

  • Shahid Electronics
    Shahid Electronics Dec 13, 2008

    Please perform Auto Channel Search from TV menu. TV will restore data of all available channels on cable. Hopefully this will resolve color / b-w problem.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Kp51ws500 Tv has double outlined colors pink and green. Tried to adjust with the flash focus and nothing happens. Is there anything else we can do. What is a hard start?

You will need to install the sony type 1 convergence repair kit which fits your model. Its available from and contains the parts and the CD with repair instructions.

Jun 21, 2011 | Sony Televison & Video

1 Answer

Does the RCA TV model D52W20 have a digital tuner? or will I need a cable box to watch TV? At our location they just switched the signal. we just had a tube TV with the cable line in the back and up till...

Greetings Pete - No, your display is what is called HDTV ready, meaning it needs a separate tuner AKA set top box.

You need to get the cable box, plug in the component video cables into your TV (usually provided) and plug in audio cables and you're viewing HDTV. See below:


Happy Viewing!



May 17, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Sony model #kp51ws500. Common problems for screen appearing warped

Need more details about how the screen is appearing warped.

if you have color separation and distorted image (warped,bowed, etc), then your Convergence ICs have failed. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.

Note if one STK chip fails, you replace both regardless.

Note: The STK chips are black about 3 inches long and will be mounted against a large aluminum heat sink (metal fins). They have about 20 pins on them. I believe they are STK392-560s in that set.

Feb 25, 2011 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Can only see an image using Twin View and colors are distorted

Ur convergence it dead.Know how to solders?Try these websites.Tv repair,Tv Repair kits for convergence kit,use what in that kit.

Oct 30, 2009 | Sony KP-53HS30 53" Rear Projection...

1 Answer

TV signal disappear after after a few seconds.

You can get a replacement U board at the following link which is most likely the problem as the U board has all the input sources on it. Look under the Sony parts category for the U board. They have the one for your model

Apr 25, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

No colors!

I would double check your wire connections sounds like a loose cable.

Jun 21, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Blue tint screen in video mode

· Which models are affected with the "flicker" problem?
A1: There are 12 models in total: KDP57XBR2, KDP65XBR2, KP46WT500, KP51HW40, KP51WS500, KP57HW40, KP57WS500, KP57WV600, KP57WV700, KP65WS500, KP65WV600 and KP65WV700.

Jan 05, 2008 | Sony KP-57HW40 57" Rear Projection...

2 Answers

Convergence out; having problems realligining red lines

Check all six small,soldered in pico fuses under IC heatsinks..
rated at 3.15 amp = do not exceed.............let me know.....T.

Nov 27, 2007 | Sony KP-51WS500 51" Rear Projection...

2 Answers

Trouble Aligning Colors

If the convergence is missing in the menu in screens,you have a bad reg ic on the convergence power supply the part number is 215530,the power supply is located on the black plastic above the right module with all the heat sinks

Nov 15, 2007 | RCA P56930BL 56" Rear Projection...

1 Answer

KP-53s65 multipule problems, hoping for single solution?

sounds like 2 different problems here. first problem sounds tuner related. second sounds convergence related. third issue (cost effective to repair ?) at this point i would replace the set. i hope this helps

Mar 12, 2007 | Sony KP-53S65 53" Rear Projection...

Not finding what you are looking for?
Sony KP-51WS500 51" Rear Projection Television Logo

115 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts


Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

74887 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

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

Answer questions

Manuals & User Guides