Question about Sony KP-57WS500 57" Rear Projection Television

1 Answer

Green screen when powering on

Tv powers up to a green screen. technician replaced a part that controls focus of colors and she still powers up green. after 20 seconds or so, she will give you a good picture. Any idea why? I thank you in advance. model # KP-57HW40

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  • orlando rivera Oct 15, 2006

    thanks for the quick reply. Technician did mention IC and capacitors and he is looking for additional info before he charges me. I will forward this info to him. Thanks again and I keep you posted.

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There seems to be a problem with the crt driver boards, or a bad capacitor in the sweep power supply that supplys the screen voltage to those boards, or a problem with the RGB section of the video jungle IC or ita associated componets. This is a hard call with out first getting a print(schematic diagram) and while its cold, look at the voltages and waveforms. Not a job for the consumer, but a trained tech should be able to handle this. If this was the problem all along, you should call out the tech and tell them they did not fix the problkem you were complaining about. Good Luck P.S. Please do not forget to rate this

Posted on Oct 14, 2006

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1 Answer

The colors are not sharp any more and they all blend in together, its either too much red or too much green or blue what can be the problem?


manual convergence should fix the problem if it does not the set most likely either has a bulb burnt out or a bulbs power / focus needs to be adjusted by taking off the panel and finding a 6 screw control panel

...
...

should look like that 3 screws in a row on top of another three screws each of thees control the power and focus of each color this is a somewhat delicate process and is a huge pain on larger tvs that you cannot completely see the picture or color while you are directly under in front of it so I had my gf come in the room and sit across to let me know which color was doing what if you dont have someone you will need to check after each adjustment

now the diagnostic
as i said each screw controls a colors power and focus the focus is used if you see an outline of a color around pictures if everyone looks like a dead jedi with a blue aura around them the blue focus needs to be adjusted and so on for each color if you skies or blue screens seem feint your blue power probably needs to be turned up and so on for each color

if through the course of this you can see the bulbs and notice one is out your probably looking at dealing with the color issue until the time you can purchase a new tv as the cost of the bulb and the technician needed to install it as they are wired to a circuit board and requires technical knowledge and tools


hope this helped
Robb

Jun 12, 2010 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Color is off and there a light blue line through out the screen


manual convergence should fix the problem if it does not the set most likely either has a bulb burnt out or a bulbs power / focus needs to be adjusted by taking off the panel and finding a 6 screw control panel

...
...

should look like that 3 screws in a row on top of another three screws each of thees control the power and focus of each color this is a somewhat delicate process and is a huge pain on larger tvs that you cannot completely see the picture or color while you are directly under in front of it so I had my gf come in the room and sit across to let me know which color was doing what if you dont have someone you will need to check after each adjustment

now the diagnostic
as i said each screw controls a colors power and focus the focus is used if you see an outline of a color around pictures if everyone looks like a dead jedi with a blue aura around them the blue focus needs to be adjusted and so on for each color if you skies or blue screens seem feint your blue power probably needs to be turned up and so on for each color

if through the course of this you can see the bulbs and notice one is out your probably looking at dealing with the color issue until the time you can purchase a new tv as the cost of the bulb and the technician needed to install it as they are wired to a circuit board and requires technical knowledge and tools


hope this helped
Robb

Apr 29, 2010 | Mitsubishi VS-45607 45" Rear Projection...

3 Answers

I just auto convergence my zenith tv and it fixed but still 3-D


Ur tv convergence ICS are dead.That why ur colors lines green,red,and blue are not linning up,and the colors look like 3-D pic.Must have soldering tools,and know soldering to fix convergence problems.Must replaced 2 STK convergence ICS and some or all of it resistors.Tries websites like Tv repair World.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for the parts and labors.

Apr 29, 2010 | Zenith R56W36 56" Rear Projection...

3 Answers

Covergence problems or alingment , its has three colors without alingment please help me!!!


manual convergence should fix the problem if it does not the set most likely either has a bulb burnt out or a bulbs power / focus needs to be adjusted by taking off the panel and finding a 6 screw control panel

...
...

should look like that 3 screws in a row on top of another three screws each of thees control the power and focus of each color this is a somewhat delicate process and is a huge pain on larger tvs that you cannot completely see the picture or color while you are directly under in front of it so I had my gf come in the room and sit across to let me know which color was doing what if you dont have someone you will need to check after each adjustment

now the diagnostic
as i said each screw controls a colors power and focus the focus is used if you see an outline of a color around pictures if everyone looks like a dead jedi with a blue aura around them the blue focus needs to be adjusted and so on for each color if you skies or blue screens seem feint your blue power probably needs to be turned up and so on for each color

if through the course of this you can see the bulbs and notice one is out your probably looking at dealing with the color issue until the time you can purchase a new tv as the cost of the bulb and the technician needed to install it as they are wired to a circuit board and requires technical knowledge and tools


hope this helped
Robb

Apr 29, 2010 | Zenith R57W46 57" Rear Projection...

1 Answer

I replaced the bulb on the unit and still have a blue spot on the screen of my Panasonic MODEL PT-52LCX35


most likely needs to be manually adjusted

manual convergence should fix the problem if it does not the set most likely either has a bulb burnt out or a bulbs power / focus needs to be adjusted by taking off the panel and finding a 6 screw control panel

...
...

should look like that 3 screws in a row on top of another three screws each of thees control the power and focus of each color this is a somewhat delicate process and is a huge pain on larger tvs that you cannot completely see the picture or color while you are directly under in front of it so I had my gf come in the room and sit across to let me know which color was doing what if you dont have someone you will need to check after each adjustment

now the diagnostic
as i said each screw controls a colors power and focus the focus is used if you see an outline of a color around pictures if everyone looks like a dead jedi with a blue aura around them the blue focus needs to be adjusted and so on for each color if you skies or blue screens seem feint your blue power probably needs to be turned up and so on for each color

if through the course of this you can see the bulbs and notice one is out your probably looking at dealing with the color issue until the time you can purchase a new tv as the cost of the bulb and the technician needed to install it as they are wired to a circuit board and requires technical knowledge and tools


hope this helped
Robb

Apr 29, 2010 | Televison & Video

1 Answer

Color is off since relocation


Hello Mia1026,

First I would suggest that you have a qualified TV technician look at your set because it sounds like your Blue and green CRTs have been damaged in the move. If this is the case they will have to be replaced.
I would if I were repairing this TV:
Check to see if there was physical damage to the CRTs
Check to see if the HV trippler was functioning
Check to see if the CRTs lit when power is applied (on the Green and Blue CRTs)
That would be a good start.

I hope this helps,

Thank you,

Sep 15, 2008 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Samsung Rear Projection Problem (not convergence)


The tv has 2 focus adjustments for each tube, mechanical and electrical.

1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.

Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.

With back cover of TV off you can usually reach your hand up beside the lens assembly to loosen the wing nut then rotate to adjust. Green is in the middle. The focus will be obvious when you rotate and look

When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.

2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.

In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.

One row is focus and the other is screen. The middle controls are for green with R/B on either side. Usually the controls are labelled as "focus" and "screen". You want to adjust the focus controls, one for each color. Look for the focus or screen label imprinted in the plastic. Don't play with the screen settings.

With the same misadjusted convergence pattern you can see a red, blue and green line. Adjust green focus and watch green line for best focus. Do same for other 2.

Screen adjustments are very exact and delicate. The easiest way to deal with them is to turn color off in Customer adjust menu. Put any color tone adjustments in the middle (low, med, high, put at med).

You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.

If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.

If focus adjustments don't help then focus control or CRT may be defective. Needs expert to determine.

easyab

http://calgaryconvergencerepair.weebly.com/convergence-ics.html


Jun 24, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Green picture


Hi,
I'm not sure about this model but most projection tv's have a focus/screen control block usually located behind the front grille where the speakers are. The grille usually comes off easily. If there are no circuit problems you can adjust the red green and blue picture tubes there. Also the focus. It will be written somewhere screen and focus: Three for screen and three for focus. If you find the screens then adjust them slowly clockwise for increase brightness on the red and blue and you may have to reduce the green. Adjust for best picture. If the picture does not adjust too good then the tubes are weak. Only if there are no circuit problems Hope this helps

Dec 30, 2007 | Mitsubishi WT-42313 42" Rear Projection...

1 Answer

51 magnavox projection tv-color mixing wrong


The are controls on the inside of the tv above the circuit boards for focus and to turn up intensity of the projector lamps (red, green, and blu). If you turn it up too far all three projector lamps kick off. If this happens, power off the set and turn down the lamp that you turned up. Power it back on and slowly turn the projector lamp up until the picture looks OK. You have to take off the panel on back of set to get to the controls.

Nov 19, 2007 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Rear Projection Tv Problem! black and white... Please help


go into menu turn color off see if you have a black and white picture if not adjust red,green, and blue screen drive on controls in back of tv you have red, green, blue it will have focus /screen controls cover each tube do one at a time blue focus and screen drive adjust to clear blue picture do all 3 tubes, then adjust them to where you have a black&white picture once this is done turn color controll back on.Thank You for using FixYa and Have a Nice Day.

Nov 11, 2007 | Toshiba 50H72 50" Rear Projection...

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