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Retrace Line Fault

I have Samsung Plano Flat TV Model CZ21K5VB. I have replaced the defective FBT beaing Model FUH 21A001B(S) with the same make of the Chinease Model. But I'm finding retrace line fault.

Kindly suggest what to do.

Thanks.

R.N.Prasad

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6 Suggested Answers

techman
  • 3130 Answers

SOURCE: Blue Saturation with retrace lines visable

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

SOURCE: av32d305 yaa retrace line on the top of the picture

yes on the top of the picture

Posted on Nov 29, 2007

  • 2267 Answers

SOURCE: retrace lines in top of tv...

These lines are cause by defective capacitors in the vertical section of the TV. No adjustment will work unless the capacitors are replace. The values of the capacitors are between 1uF, 10uF or possibly a 47uF.
I do not have the service manual at this moment but you can google it by the model number of your TV.
Let me know if you need further assistance.

Posted on Jun 16, 2009

welcomejee
  • 10594 Answers

SOURCE: SONY TV PICTURE TURN GREEN WITHOUT RETRACE

Picture goes to high green with retrace lines that shows picture tube is defective and requires replacement.
Usually in above symptom, TV goes to standby mode and standby light blinks when green raster problem occurred.
New TV is better option because picture tube of KV-34XBR960 would not be available any more.
Thanks.

Posted on Aug 14, 2009

  • 1 Answer

SOURCE: TELEVISION CHASIS HAVING TDA 9370 SINGLE IC

Try zener from abl.

Posted on Sep 13, 2010

gopakumarg43
  • 68301 Answers

SOURCE: white screen with retrace lines

Hello

your TVs chroma IC has damaged. It has shorted circuits iniside, and you have to replace it with same type and number. If you have a good concept of soldering and desoldering, you can replace it. If you are not able to do so, leave it to any expecienced technician. Just open your TV, and measure the voltages at the three colur cathodes at the picture tube base board. If these voltages are very low, say at about 30VDC or so, measure the main input voltage to the video output section, and it should be around 260VDC or so. If it is not there this type of fault can occur. Measure this voltage first. If there is voltage as mentioned above, no doubt, the chroma Ic has damaged. OK.


Posted on Dec 11, 2010

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I am unable to find in your statement about which brand or type of motherboard is used. One thing i come to know your using service mode kit. knowing in your statement your are a technical person. My simple idea is first you set the TV in standby mode using remote. Then in FBT reduce the screen control minimum position, the release standby. Now the tv is oscillated, now slightly increase screen control till get maximum video and zero retrace line set in position. Even no improvement give me clear picture of brand and microprocessor ic etc. there is a chances to solve by having the above details.

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