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Sharp tv 29fl94

Have changed the horizontal outputs and other components around the flyback but have not changed the flyback

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Check the frequency at the base of the horizontal output transistor. If there is no frequency, check the chroma IC. If there is frequency, replace the Line Output Transformer {LOT}

Posted on Jul 17, 2013

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How do i fix my crt sharp 21G2-s tv whose screen is total black when switched on?


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. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

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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. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Nov 21, 2014 | Sharp Televison & Video

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I have sound but no picture on my tv sharp aquos 20 inch


if you mean have sound but no Pic.or no raster, horizontal section is the culprit. most problem is at the Horizontal output section that drives the Flyback transformer. Pull out that HV cap & test them to ground if there is some arc coming out. No arc means failed output section or the flyback transformer need to be replace..

Sep 25, 2013 | Sharp Aquos LC-20B4U-S 20 in. LCD EDTV

1 Answer

TV BEKO BK20M


Check horizontal oscillator and output components. Check horizontal output components. Flyback transformer, horizontal output transistor. Pictures of suspected parts attached.6_13_2012_3_41_09_am.jpg6_13_2012_3_41_23_am.jpg6_13_2012_3_41_46_am.jpg

Jun 12, 2012 | Beko Televison & Video

1 Answer

I have a 32" Sharp LCD tv and last night we had a


You have a bad HOT, horizontal output transistor. It will have a number on it, and you can find it here.
http://shop.ebay.com/i.html?_nkw=horizontal+output+transistor+&_cqr=true&_nkwusc=horizontal+output+transitor&_rdc=1
Watch part replacement videos to get this working again. Also check for bad parts around this transistor if you have multimeter and component experience.

Jun 19, 2011 | Sharp 32R-S50 32" TV

1 Answer

We replaced the transformer for our RCA F27650. It was sparking and now it is not, but now the screen won't turn on. It is just black. We hookd all the wires up like they were. we can hear sound, but...


Hello
Along with the flyback transofrmer, its horizontal output transistor also must be replaced. I don't know whether you have replaced it or not. If not, replace it too. It can be located very near to the flyback transformer, a three terminal component, black in colour, usually screwed to a metal heatsink. Then switch on the TV and measure the video output voltage at the video output card pluged directly to the picture tube neck. The collector of the video aoutput transistors must come around 145VDC. If it also is there, advance the screen control on the flyback transformer to get a raster. If that voltage is not there, it means that the flyback transformer is not working, and horizontal oscillator stage should be checked for oscillation, check the lined drive transformer for its primary winding open, Check the entire horizontal oscillator section. The collector point of the line drive transistor, the transistor that drives the line drive transformer, a small transformer soldered diretly to the printed circuit board; should be checked with frequency meter. The frequency at that point should come around 15525HZ approx: OK.

Mar 19, 2011 | RCA F27650 27" TV

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Sharp tv primo 21`inch turn on red light only


check your horizontal transistor maybe it's shorted replace horizontal transistor or maybe the fusible fuses are open check for open resistors at the horizontal section of the circuit.

Dec 22, 2010 | Sharp Televison & Video

1 Answer

Sound but no image


I had the same problem with my sis tv. You have to open the front grill and see if the filament on the neck of the crts is lit. If it not you may want to check the horizontal ouput transistor(Q416- for open or short) and its related components around it. If it lit you may want to replace the vertical output IC,Q301 and check the related components around it.
The horizontal and vertical output is on the deflection board where the flyback transformer.. you need to open the back of tv and take the board out to check...

Apr 16, 2009 | Toshiba TN61X81 61" Rear Projection...

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RCA F36650 36" 2002 xbox ready tv


Yes it is the Horizontal Output and a few capacitors and resistor that needs changing. If you are good at desoldering and soldering you could do this. I think on this set its the Q4401, caps C4402, Cr 4402, Check Q4802, C4102, If you just want to try new parts and hope it works then you have to check voltages at different points to fix set. Now it also could be Bad Flyback in this set too. I have seen where you change flyback and horizontal output and c4402 would do it. R4118, R4114

Sep 09, 2007 | RCA F36649 36" TV

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