Question about Samsung Televison & Video
Ihave ctv samsung CS568BS PROBLM IS NO PICTURE NO SOUND RASTER WITH RETRACE LINES PRESENT TDA8842 RGB OUTPUTS ZERO BUT OSD IS PRESENT I CHNGD 8842 IC NO IMPROOVEMNT KINDLY GIVE ADVISE OR ITS CKT DIAGRAM PLEASE.
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Posted on Jan 02, 2017
could be but there are a few checks that need to be donr first.. Try to turn down the g2 control just a bit on the flyback transformer. If no effect unsoder the blure drive transistor on the crt board If the blue is still there that means the crt is shorted and you could try to clean the elements with a crt rejuvenator and see if that helps. If the screen goes to red and green after you disconnect the blue drive transistor then you need to check the osd drivers as well as the rgb output drive from the video IC. If the blue gun in the tube shorted or leaky I have in the past and it really works a isolation transformer that plugs in to the crt socket and the other end plugs into the crt. What this does is isolate the the gun of the crt from the filiments and thats where they get shorted or leaky but for how long it will last who knows.
Posted on Mar 26, 2006
Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket
Posted on Dec 27, 2006
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