Question about Samsung Televison & Video

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Samsung TV used tda9381ps/N3/3/1774ic nopicture nodisplay plainretrace line

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High voltage is needed to power the screen. Check the high voltage circuit. Take off the rear panel. The high voltage is need where the 120 volts. There is a high voltage transformer and on the output the volts should equal at least 390 volt DC - check it at the capacitor. If not, check the capacitor. The one in the TV is 100 uf rated at 450 volts. I put in a 370 uf rated at 400 volts.

Posted on Jan 01, 2018

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Posted on Jan 02, 2017

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srinibash_ka
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SOURCE: 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.

Posted on Jan 12, 2012

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gopakumarg43
  • 76060 Answers

SOURCE: 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.

Posted on Aug 29, 2016

gopakumarg43
  • 76060 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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TDA9381PS/N3/3/1997 Samsung plano tv..my video input is not working plz help me out


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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.

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1 Answer

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.

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My Samsung TV has only a faint picture and full sound.


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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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replace the vertical driver ic and the proccesor ic

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1 Answer

Nopicture


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