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Question about Igo flat star plus 21" problem

Question about Igo flat star plus 21" problem please solve my problem Picture have sinking and H-output transistor over hit and AFC problem

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Posted on Jan 02, 2017

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SOURCE: lg flat 21 inch tv

You have to check the high voltage diodes near the horizontal transistor and the small transformer. Diodes might have gone leaky. Check the capacitors also.Replace the black colored diodes with new ones with identical part no.

Rarely EHT coil will have problem.

Posted on Sep 15, 2010

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SOURCE: My igo 14'' tv no sound no picture all switches

Check the Logic board and switch modulator controller they are faulty

Posted on Apr 14, 2013

gopakumarg43
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SOURCE: Onida 21 flat tv h output transistor over hit and after ten minutes blow of

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 Jan 13, 2017

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Onida 21 flat tv h output transistor over hit and after ten minutes blow of


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.

Jan 13, 2017 | Televison & Video

1 Answer

Turns on then Off right away


Likely bad output transistor(s) which are the large transistors mounted to the heat sink. Use a multimeter and set to diode check to find the bad transistor(s). Replace the shorted transistors..... and any bad components in the bias / output section of the amp. That is the most likely the trouble with your receiver although there could be many other problems.

Dec 12, 2013 | Harman Kardon AVR 320 Receiver

1 Answer

Igo 21 colour flat tv


Check the video output stage circuit. Check the video output transistors. These transistors can be located at the video output card, at the neck of the picture tube, will directly plugged on to it. If the red output transistor is open, this kind of fault can occur. Replace it and check. To get some details, http://electronicshelponline.blogspot.com/ Pull up older posts.






Dec 04, 2013 | Televison & Video

1 Answer

My igo 14'' tv no sound no picture all switches


Check the Logic board and switch modulator controller they are faulty

Apr 14, 2013 | Televison & Video

1 Answer

Samsung crt monitor


Check power section for proper power supply. check main capacitor or change it .if this problem not solve then check horizantan output transistor(this is placed near eht on hit sink big in size)

Jul 12, 2008 | SAMTRON 55V 15" CRT Monitor

1 Answer

Power went out, tv won't come on


If you are lucky, it's only a blown fuse, but with a blinking light on the front, this is doubtful. I would pull the back cover anyway and check the fuse. If fuse is ok, then normally if you have no sound and no picture, you have a blown "horizontal output transistor". Look for the big wire (usually red) coming from the picture tube to the circuit board. The red wire goes to a large object on the circuit board called the "flyback" transformer". Usually very near this transformer you will find the h.o.t. (horizontal output transistor). It will normally be mounted on a silver piece of metal (a heat sink), about 2 or 3 inches square or possibly rectangular. The transistor has three pins coming out of it and is probably the largest transistor you will see that has only 3 pins. The upper portion of the transistor will be clamped (or screwed) into the metal heat sink. You have to desolder the h.o.t. and replace it with a new one. The h.o.t. usually costs only about $10.00. If the fuse and h.o.t. are good, then the "flyback" is probably bad and they run from $25 to $100. If the TV is worth only about $200, then replacing the flyback is not recommended, because there is no guarantee that this will solve the problem. Keever.

Mar 02, 2008 | Mitsubishi WS-65908 TV

1 Answer

Repair of Sony 21'' flat screen television set


problem lies in the power supply check opto coupler or check horizontal output transistor and lot

Nov 22, 2007 | Sony 21" Trinitron P202 Flat Screen...

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