Question about Sony KP-51HW40 51" Rear Projection Television

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Blue lines on screen when dark

Hi I was just reading how you fixed the problem of blue lines on the screen when its a dark picture. on your kpf 57 Sony rear projection. It sounded like you had a fix for the problem but the fix you wrote ended before you finished it can you tell me how to fix my problem please. i own a sony WEGA KP-FS 57 model . I could not find this in the product reference.

Cheers Maggotdog.

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Turn down blue screen drive control.

Posted on May 19, 2008

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Picture is very blue, especially in dark scenes.


Sony TVs has an Optical Block issue. If there is an issue with the optical block, then there will be green, blue patches or tint on the TV display. Try resetting the TV to the factory settings and try Power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue still persists, then TV may require service. You can contact the Customer relations team and check for the available options. Sony had repaired free of cost for such issues. Hence, contact the customer relations.

Jul 21, 2010 | Sony KP-57WV700 57" Rear Projection HDTV

1 Answer

Thin red arched lines, when screen is dark.


common problem with sony, focus and picture level need to be adjusted, should be done by a tech. (high voltage) in focus block.

Nov 24, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Faint lines show up when i get dark screens in movies


First check what color of faint lines comes then reduce Screen Volts in TV of that CRT (tube)
Take off lower front cover, speaker grille of TV, there you will see focus control block that has 6 control knobs, upper 3 knobs are focus adjustment of red-green-blue CRTs and lower 3 knobs are screen volt controls for red-green-blue CRTs. Turn screen volt control knob CCW to reduce screen volts of desired CRT.
Put TV on any free AV input so screen will be dark enough to adjust screen volts.
Thanks.

Aug 28, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Can see the picture for a minute or 2 then the screen turn blue


It's most likely that the automatic digital convergence system is messed up, without knowing more. You can read this article & see if you can fix it yourself:http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.htmlTo replace the convergence system, you'd be paying over $400.

Jun 11, 2009 | Sony KP-57HW40 57" Rear Projection...

1 Answer

I have a Hitachi 57 " rear projection TV, the screen is dark


Unfortunately it sounds like your CRT's ( picture tubes ) are getting weak. You have 3- red, green and blue. It would not be in your best interest to repair it because of the cost of the crt's and if we can still buy them. A lot of analog parts such as those are very hard to locate and is getting worse by the day.

Apr 16, 2009 | Hitachi 57SWX20B 57" Rear Projection...

1 Answer

Horizontal blue lines with a slight blue wash in the screen


Hi,
Its because of Over Voltage of Screen (G2) to Blue CRT.
Take off front lower cover (speaker grill) and unscrew board. There you will need to find Focus Block mounted having 6 control knobs. 3 knobs are for Focus control and 3 are for Screen volts control. Find Blue Screen control knob and turn is Counter Click Wise slightly until bluish shade disappear on screen including few blue horizontal lines.
If you select AV input to adjust that will be fine as you do not need to wait for dark-scene.

Apr 09, 2009 | Sony KP-65WS500 65" Rear Projection...

1 Answer

Dark background blue tint


Try the Magic Focus option on the menu screen found under "Picture". Make sure the TV is on for 20 minutes before activating this option. It is also best to run this when the room is dark.

Jan 19, 2009 | Hitachi 57F500 57" Rear Projection...

1 Answer

Sony tv KP-57XBR10W


Correct ! One set is for RGB focus and the other set is for
RGB screen voltage............................T.

Oct 05, 2007 | Sony KP-57HW40 57" Rear Projection...

5 Answers

Sony KP-57WS500 57 in. Rear Projection Television


Hi Guys

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.

Goo luck.

Jun 05, 2007 | Sony KP-57WS500 57" Rear Projection...

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