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Loewe xelos 5270 zw. picture becomes green

Loewe xelos 5270 zw. after tv has been on for maybe 10 minutes or more the tv picture becomes dark and mostly green in colour.

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  • tinapb Feb 03, 2010

    thanks, i'll try your suggestions. if they dont work am i looking at buying a new tv or should/can i get it fixed?

    thanks again

  • tinapb Feb 07, 2010

    the set is 6 years old. is ok then green and dark - then it returns to normal.

    thanks

  • tinapb Feb 07, 2010

    yes - thank you

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  • Master
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Hi there,

Well most probably the cathodes have worn out. The emission material on the surface slowly becomes inactive. Usually you see one color go first, then the others. At the same time you will observe a loss in sharpness, because a larger cathode area is being used, giving a bigger spot. Rejuvenating is done by applying a (too) high filament voltage, in order to bring new emission material to the surface. It will not work for long and there is the risk of burning the filament wire for good. You won't be able to see it without taking the back off, but your CRT (picture tube) filament is going out. You could try to wriggle the CRT Tube Socket back on a little tighter then watch it for a while again. Then again, it may also be that for some mysterious reason your VG2 voltage has dropped below spec. A too high VG2 voltage will cause a smaller cathode area to be used, leading to a sharper picture but accelerated cathode wear.
Please post comments for more help or information........

Good Luck!!

Thanks

Posted on Feb 03, 2010

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  • Master
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If your set is over 12 years old I would say it could be having picture tube problems. It could also have a bad component in the video drive circuit. The picture tube could be checked by a competent shop to ascertain that the tube is OK. If it is the repair of the problem causing the loss of drive should not be difficult or costly by a reputable shop. It does sound like a problem which would be beyond your capabilities. Find a reputable shop. Let me know how you make out or if I can be of any more help.

hardrocko

Posted on Feb 03, 2010

  • Kim Yearick
    Kim Yearick Feb 07, 2010

    I can't believe the fix I advised wouldn't work but yes if you adjust or have someone adjust the screen drive and the unit still looks dark then your CRTs are done. They are not worth replacing these days and yes you would be looking at a new unit. Let me know.



    hardrocko

  • Kim Yearick
    Kim Yearick Feb 08, 2010

    6 years would be premature for a tube failure. Obviously the green is going into accelerated drive compared to blue and red. You could have a dirty screen drive control or a bad focus divider block. You will probably need a qualified tech to check that out for you. Give it a try and let me know how you make out.



    hardrocko

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