Question about Samsung TX-R2435 TV

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THE PICTURE OF SAMSUNG KIT IS CUTTING FROM BOTTOM LINEARITY RELATING TO IC TDA9381PS/N2/3/0660

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  • shahjeetsing May 12, 2009

    i urgently need the solution of that question.

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6ya6ya
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Posted on Jan 02, 2017

gopakumarg43
  • 73691 Answers

SOURCE: sinck problem

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Aug 11, 2017

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Lg 21" flat tv using ic tda9381ps n3 /3/1959.The display is white with retrace lines &picture


Check all the voltages at its video output card [CRT base PCB] If all are found OK, check and replace the chroma IC. The most probable cause is defective IC itself. Check its heating effect. Will overheat within minutes after the set is switched ON.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences of the author of that site.

Aug 29, 2016 | LG Televison & Video

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TDA9381PS/N2/3I1041 alernate ic name...?


To my knowledge there is not an alternate circuit. Take a closer look, the number you gave is for a vertical defliction IC.

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1 Answer

TDA9381PS/N2/3/0660 BASED SAMSUNG TV INSTANT GOES OFF WHEN POWER ON RASTER CAME AND TV TURN OFF WHAT THE POSSIBLE PROBLEMS SHOULD I CHECK?


This fault is in protection circuit.First check the 125V.D.C at sm out voltage.then eprom I.C.(memory) & Set the parameter by opening service mode Stanby>Display>Menu>Mute>Power on if require.

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LG vertical failiure vertical line at the bottom of the crt


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Nov 12, 2008 | Televison & Video

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My samsung cr32z30 32" hdtv turns off automatically after running for about 30min to an hour. also the picture is curved on both sides when watching tv in 4:3 ratio. the curve is most prodominate at...


Linearity coil (there are several) shorted causing HV to increase and causing HVSD, no replacement parts available. Replace sweep module to fix.

Nov 10, 2008 | Samsung Televison & Video

1 Answer

CRT TV vert section


Hi,

Vertical linearity is more of a DCV bias issue rather than feedback or AC coupling. Hence it would be more apt to suspect resistors rather than capacitors. Of course, it is also possible that the large IC that drives the Vertical output maybe at fault (least likely) but often would have trimpots for adjustment. Most current designs do away with trimpots and rely on self correcting (feedback loop) which is simply a resistor in the 100k range. In certain instances, it could be a thermistor or resistor or diode limiter attached to the yoke itself.

Best would be to use a service manual or at the very least a schematic diagram with voltage readings and compare actual on PCB against schematic.

If you could post back the make & model or preferably the chassis number of the TV, might be able to comment back known common vertical issues.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 05, 2008 | Televison & Video

1 Answer

Samsung projection 54"


Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.hdtvoice.com/voice/showthread.php?t=28929
Or send to ptscorp.com
http://www.hdtvoice.com/voice/index.php?s=

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