Question about Grundig GF70-600 TV

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Grundig TV - Colours all mixed - still have fullpicture

My Grundig TV has a full picture but the colours are all over the place ( like a rainbow effect ) in circles on the screen - sound and picture is still clear tho.
Any suggestions ??
many thks.

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  • rosscop Aug 25, 2008

    many thanks for yr xplanation - i will follo yr advice.
    rgds
    rosscop

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Http://tv.manualsonline.com/manuals/mfg/grundig/grundig_lcd_hdtv_product_list.html

you can get manual you did not told us modal etc

Posted on Aug 25, 2008

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Hi rosscop

You have a magnetic interference problem. First, have you put any magnetic objects like speakers near the set recently. They will cause this. Turn the set off at the wall and wait for 15 mins for the PTC device that turns on the degauss coil to cool and operate. It is the loud burst of hum you here when you turn the set on from cold.

Grundig TV - Colours all mixed - still have fullpi - 0083efa.jpgThe PTC is a postive tempeture coefficient that allows alot of current to flow at first, heating up as it does, and then slowly less current as it heats. This is why you need to turn the set off and let it cool. If the problem remains The PTC may be faulty allowing too much current to flow and upsetting the magnetic flux about the tube. If you dont have the skills you will need a technician to sort it out for you.

Posted on Aug 25, 2008

  • Graeme Ross
    Graeme Ross Aug 25, 2008

    hope this helps to solve the problem. Sometimes all that is needed is an auto De Gauss of the tube(what i have suggested doing above). A tech may try a degaussing wand to resolve it also, but generally, either a nearby magnetc feild, or a fault in the PTC causes this problem to happen out of the blue. . Grundig Jumbos were notorious for colour impurity problems in the Southern Hemisphere, allegedly because the sets are manufactured in the northern hemisphere, and dont cope well with the lines of flux we have down under.



    Thanks for using FixYa.



    regards

    robotek

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