Question about Mitsubishi WS-55859 55" Rear Projection Television

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No Green CRT projection

I opened the front of the tv and only the RED and BLUE CRTs are working.
The center green does nothing. The picture on the screen is reddish in color.
The sound is good and the channels are changing fine.
How do i get the green back?? Help!!

Thanks
Sly

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Check the high voltage supply. each gun have a single input. be very careful, high voltage (1000v).
you are looking to buy a high voltage transformer. it is not cheap, and it is not easy to find.

Posted on Oct 14, 2008

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Have 57 " Toshiba projection TV there is way too much red in picture


TV has 3 CRTs, red, blue, green. Its possible that you have a bad blue or green crt. If that were the case the red would be prevalent and the pic would be reddish. The tv has a picture "level" adjustment that if done correctly could get it looking correct. Its probably best to have a tech. do it since you can make it worse if you do not know what you are doing, also there are high voltages present. Good luck

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Turns on for 30 sec then goes bright blue and goes back into standby. turn back on it does it agian


This is blue CRT problem in tv as it is rear projection tv that has three CRTs red-green-blue inside to project color picture on front screen.
Blue CRT (tube) will be replaced to fix the issue and it is job of Pro because lots of adjustments are required after replacement of tube.
Local tv repair shop will help you for that.
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Sony kp51hw40 has green shadows and on edges in pictures and blue flickers on and off, tried all adjustments including screen, focus, and menu??? no luck


The CRTs in this model of TV had a problem with internal leakage. The blue was usually the first to show the symptom (flicker). Because all 3 CRTs are connected to the same high voltage source, when 1 acts up, the other 2 suffer as well. You need to replace the Blue CRT. However, this TV has some age on it... 1 tube will lead to 2 tubes, and 2 tubes to 3... They only last about 7 years. If you love the TV, replace all 3 (about $200 each). I recommend replacing the Red and Blue first, adjusting the geometry and convergence to the original Green. Then replace the Green, adjusting the geometry and convergence to the new Blue and Red.

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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.
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1 Answer

Red Picture on My Rear Projection TV Phillips


Hello traci061882,

This might be an indication of defective CRTs (Cathode Ray Tubes). I would first check to see if the Green and Blue CRTs were functioning or have other issues such as coolant leakage (do visual inspection). Anything other then this will require you to contact a qualified TV repair Technician to troubleshoot the problem. I would suggest for starters that the technician perform a test on the CRTs with a CRT tester, This is the best way to do this it will cut to the possible cause right away, if the CRTs can be rejuvenated, at least you will have about two to three more years of use out of the TV before the CRTs are completely gone. However if the tubes are not the problem then the technician will have to troubleshoot the circuitry the connects to the CRTs.


I hope this helps,

Thank you,

Shuttle83

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1 Answer

Lines horizonal - seems to be caused by voltage to green CRT


Your green CRT is shorted. To test put your red crt socket on the green and your red on the green. then try turning up red control if the green now works its not your tube. If the same thing happens with the red socket on the green you can be sure its the green CRT if the green works properly with the red socket, then you have a problem in the green drive circuit and not the CRT. hope this helps.

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Samsung HCL4715W...


look for a blown fuse around the flyback

Dec 15, 2007 | Samsung HCL4715W 47" Rear Projection...

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Picture has turned green


Possible green CRT bad....remove lower front speaker cover
and access panel.......carefully disconnect green PC board
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Picture background is Red Sony KP-57wv700


Is it a reddish tint or the picture is just red? Did it just happened, or you are just noticing a gradual change? Reddish tint: Blue and/or green CRTs are getting weaker. More likely the green CRT. Unplug the unit and somehow remove the back cover, etc. to get a direct view of the CRTs. Use a flashlight to inspect each CRT through its lens. CRTs with excessive wear will show a definite "burn" mark where the picture forms. Compare the center CRT (green) with the other ones. Normal wear in all three tubes is expected. What is important is to notice the difference. A significant wear in one means it has to be replaced, but usually all three have to be replaced in order to get the right purity. This is a major overhaul, and unless the TV has a sentimental value, it's not worth it. Picture just red: Green and blue CRTs not firing. This is easily observed by running the TV with the back cover removed. Probably a loose connection, but you will need the manual to trace it. You could gently tap the chassis while the TV is running and see if this restores the blue and green CRTs.

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