Question about Sony KP-51HW40 51" Rear Projection Television
Ur tv have a problems know as a Convergence problems,it dead.The tv convergence board reqiure 2 STK convergence ICS and some or all it resistors to be replaced to solved the convergence board problems.The shop will cost u $300-350 for parts and labors.
Posted on Jul 05, 2010
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Posted on Jan 02, 2017
Your problem here has to do with the amount of aging that happens to the three colour tubes - red, green and blue.
Blue actually ages slower than red and green. What actually happens is the green tube deteriorates and due to green being the predominant colour for brightness causes the blue tube`s flyback lines to appear - especially when switching between inputs or when the video is blanked.
No replacing the blue tube will not solve your problem as the tube is actually the best one of the three.
As someone mentioned there is a way to adjust this by removing the speaker grill assembly in front of the set. Doing the service mode adjustment with the remote is not the right way to solve the problem - you would be adjusting the colour gain and off-set values and would seriously be compromising the white balance of the set.
On the left hand side behind the speaker cover you will see a black square block with six adjustment points. Look for the one marked SCR BLUE, Switch the set to a unused input so the blue lines become visible. Now adjust the BLUE point counter clockwise until the lines disappear. A small adjustment should do it, Switch back to a picture and make sure the whites are still white.
This should sort your problem. I would however suggest asking a Sony service centre to do this for you. This is a dangerous thing to do as you will be working close to the 35Kv supply the the anodes of the three tubes.
I hope this answers your question.
Posted on Mar 08, 2008
Either the pins on the convergence ICs need to be resoldered or the ICs need to be replaced. These are large black ICs attached to a heat sink and should be marked STKxxx. Resolder first. If that does not resolve it, replace the ICs.
Posted on Mar 17, 2008
Please mention how many times standby light blinks on your KP-57WS520
There would be bit long pause between blinks so count the blinks and let me know to help you.
Posted on Dec 05, 2008
Thats great that you are electronic technician and can understand and rectify problem easily with help of service manual.
Please have related service manual from Manual Zone with little fee.
Service manual has all technical details, schematics and troubleshooting for this TV.
Posted on Dec 15, 2008
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