Question about Sony KP-53XBR45 53" Rear Projection Television

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Focos is bad

I need to know where the focos can be adjusted,

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Re: focos is bad

You may not really have a focus problem... To fix it, all you have to do is remove all the screws on the bottom of the screen from the front of the tv. Generally what happens is that the lens on the 3 guns, RGB get dust and crud accumulation on them. All you have to do is get a soft cloth, like a microfiber one to clean it off. I would recommend that you use a mild cleaner and water to clean it. Also the mirror is another thing that you'll need to clean. It too gets dirty, On the lens and the mirror it looks like a white or grayish film that is clouding your picture.

Posted on Nov 13, 2008

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Re: focos is bad

Not good for a non qualified service personnel!
WARNING! focus is close to the HIGH VOLTAGE!
Consider this.... if your TV is more than 5 years old, it maybe the crt is gone?
Those TV has self focus... nothing to adjust what so ever?
Try cleaning the inner lens... might help?

Posted on Oct 10, 2008

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Bulb needs adjustment

If toshiba projection go to main menu and engage convergence to look--should offer some points on screen where you can try to adjust.

If badly skewed or will not adjust (based on model number posted here) both the stk-392-110 chips will have to be replaced and the set adjusted.

This can be a do it yourself repair if you have some skill--soldering is involved as both chips have 18 pins each.

Let me know what you find and if you have questions.


Mar 21, 2012 | Toshiba TP50H50 50" Rear Projection...

1 Answer

Mi televisor no enciende solo se prende el foco rojo y parpadea en donde dice timer

bueno tengo una television pt4298hd akai el problema no enciende parpadea el foco de timer 10 o 9 veces y no enciende destape la tapa de atras y desconecte un cable rojo que tiene el nombre de screm y la television enciende pero no se mira como debiera porque se mira el color verde y el rojo pero como si le faltara el color azul mi televisor es una dlp akai de tres lentes y quisiera saber cual es el problema

May 02, 2011 | Akai PT4298HD Rear Projection Television

1 Answer

Im havin double vision to my toshiba tz50v61

This model uses two of the STK-392-110 convergence chips--both along with any bad resistors around them are going to need to be replaced and the set adjusted.

If you can do the repair you can buy a pair of the chips on Ebay for less than 14 dollars plus shipping.

If you cannot do the repair shop around your area as most shops charge 300 or more for this type of repair.

If the set will not adjust in the customer menu one or both chips are bad---BOTH need to be replaced.

If you know how to solder or know someone who can do it for you--I can describe in general terms what you will need to do for this repair.

If you have any questions or need advice, let me know as I do this here for free.


Nov 02, 2009 | Toshiba TZ50V61 50" Rear Projection...

1 Answer

Poor green convergence

IF convergence is bad---with the original remote go into the customer menu and select convergence--if it is skewed or bad and will not adjust you have a bad convergence IC.

This model (KP53HS30) uses two of the STK-392-560 convergence chips---Both, along with any bad protection resistors around them need to be replaced and the set adjusted with the remote.

You can buy a pair of the chips on Ebay for less than 14 dollars---

Clearly I do not know if you can do this repair but if you can you can save the set and a lot of money.

If you cannot do the repair shop around your area--most shops get 300 or more for this type of repair--I do lots of them here for 200-250 right in people's homes.

The repair involves getting at the chips and unsoldering them---each has about 18 pins.

Let me know if you want general instructions on how to do this or if YOU HAVE ANY QUESTIONS OR WANT ADVICE--REPLY TO THIS POST

I am here to help people.


Oct 26, 2009 | Sony KP-53HS30 53" Rear Projection...

1 Answer

When a blue screen appears, what could be the problem?

On this model KP-57HW40, if the screen is blue with or without some slight curved trace lines---either you have a bad BLUE picture tube or maybe an adjustment that can restore the set to normal operation.

A lot of these sets had bad picture tubes----if a bad tube they are not available--only way to get one is remove the bad one in the set and have it rebuilt--very expensive and usually not worth the costs.

Let me know---if you go to a unused video input--is the screen Blue with or without faint curved lines?

If it is I can give you fairly easy instructions on how to try to adjust for this-----Understand: if the adjustment corrects the problem you may only be buying some time with this set---if the problem was caused by a bad tube---sooner or later it may come back...

Let me know if you want the instructions and I will post them here for you.

Regards, SD TECH

Oct 18, 2009 | Sony KP-57HW40 57" Rear Projection...

1 Answer

Adjusting red hue

You will find that info here but it could be a red CRT going bad and the adjustments might not work.
Hope it helps

Jun 24, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

TV- rear projection

If you try to adjust this you will make more work for yourself. The problem is convergence amps go bad and anything you adjust now has to be readjusted when problem is fixed. Also, convergence problems are a very common problem in all brands of projection televisions, not just magnavox, because the amps run pretty hot holding the colors in aligment. It's unfortunate you had bad luck with this set but we are also now seeing LCD, DLP and PLASMA sets that barely make it through the first year. More and more brands only carry a 90 day warranty now, so they know the life span is decreasing. To repair your set you will need soldering/desoldering equip. and test equip. or you could pay someone with experience 175.00-375.00 to solve your problem for you. That's why we're here. Lots of luck, Russmann.

Jun 16, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

RCA P46924

If you cannot adjust the red or blue in all 4 directions in the conversion adjustment menu. Your Convergence ICs are bad and will need replacement. Let me know if you need any further instructions.

Feb 29, 2008 | RCA P46924 46" Rear Projection Television

2 Answers

RCA P46159 Convergence

Why would the set go out of adjustments? I highly doubt if the set needs only alignment. These adjustments are for small drifts only. If anything is way out more then what the on screen can adjust, you have a problem with the convergence correction circuit. There is a convergence power supply in this set that goes bad a lot in these TV sets. There is also a convergence driver board. These RCA sets do not have the integrated IC's like most sets do. Each convergence yoke, horizontal as well as the vertical, has two independent power amp circuits driving them. And that's for all there tubes. So there are 6 separate amps controlling the convergence in these TV sets. You really should call in an RCA authorized repair shop to assist you in this repair. Good Luck

Oct 01, 2007 | Projection Televisions

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