Question about Sharp 25R-S100 25" TV

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Sharp colored tv

No power only pilot light will lights up...but theres no power at horizontal output.

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  • rhaldtennis Oct 17, 2008

    what is the sign of busted flyback transformer?

  • zavalnitchi cornel May 11, 2010

    check the voltage on the collector of final horizontal first.check the driver transistor of the final horizontal.Please,ask me after that!

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Check the b+ supply of your flyback if they have check the horisontal transistor. check also if they have 5v supply in the system and 9v in the chroma ic or replace the memory ic.please reply.

Posted on Oct 29, 2008

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I have a sharp TV model no.27f541 that doesn't want to power up. When tried to power up I can hear the high voltage and see the filament light up for about 3 seconds and the TV cuts off.


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.

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Tda9380ps /n3/3/1664 using in sharp tv power supply ok ,but no EHT ,the power LED are glowing red light press program key to change green light to return in few miniutes to standby in red light


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 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 to the author of that site.

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1 Answer

Tda9380ps /n3/3/using in sharp tv power supply ok ,but no EHT ,the power LED are glowing red light press program key to change green light please to help send circuit diagram and IC pin configaration


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. Give a special attention to this 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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1 Answer

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If the power light flashes, it is an indication of shorted component/s on the main board circuit. most probably it will be with its Horizontal Output section. Horizontal output transformer, Horizontal Output transistor etc: Your set need a detailed check up.

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1 Answer

While watching tv it just blanked out and would not come back on. there are no lights on in back of tv. I also tried plugging it into another wall socket and nothing happened


that sound like horizontal section got bad. please recheck that horizontal output transistor & all component like capacitor.& resistor. good luck!

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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.

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2 Answers

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Dear sir/Madam,

Check power supply(SMPS) section.Check/replace all electrolytic capacitor without power capacitor and resoldaring power supply section after then check horizontal output transistor.


thanking you
uttam
uttam_bm@yahoo.com

Sep 20, 2010 | Sharp Standard (CRT) Televisions

1 Answer

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if the power indicator lamp lights on, but in stand-by mode. it signifies the power regulators are still working but the problem is in the horizontal section. you should check the horizontal output, or drive, range from transistor horizontal output and IC horizontal drive and if damaged must be replaced. if the indicator lights do not light on at all, you should check the power regulator such as transistor regulator. for more detail how to measure the Voltage on TV you can see in my Blog here : http://trend2download.blogspot.com/2010/08/how-to-measure-voltage-on-tv.html

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if the final flyback is ok ,then check the driver transistor and the voltage in his collector .Probably the flyback transformer is ok.please reply.

Oct 17, 2008 | Sharp 25R-S100 25" TV

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