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Onida 21 tv dead . powersupply dead repeated failure poweroutput transistor all spares good in powersupply but failure for power output transistors

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

Marrie
  • 563 Answers

SOURCE: power supply failure

I've asked the exact same question to a factory engineer at a well known manufacturer and they could'nt aswer this either

Posted on Apr 02, 2008

scott201201
  • 170 Answers

SOURCE: Horizontal output transistor failure

check b+ comming from p/s. also check for blue flat caps in line with h-output circuit. if blown out the side. remove them from circuit. also might have a HVT goin bad. I believe this is also the model that might have a mod for h-out running too hott that requires adding a resister in the h-drive circuit. also try a heavier duty h-output.

Posted on Apr 09, 2008

  • 1 Answer

SOURCE: Disney DTD1363-car, Need part # of transistor

The tv keep shuting off an the dvd door won't open. I have model # DTD1363-CAR

Is there any recall on the tv

Posted on May 21, 2008

ladywinn
  • 5138 Answers

SOURCE: Replaced Flyback Transformer and Horizontal Output Transistor

I am proud to see you got your set working Good job!

Posted on Aug 26, 2008

premtech
  • 934 Answers

SOURCE: dead set, HOT transistor keeps shorting

It's the copper coiled magnet on the neck of the crt closest to the front of the tube.

Posted on Dec 21, 2008

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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

Sony tv 21 inch horizontal output transistor failing frequently


• Power Supply B+ is higher than normal


• Partially shorted Flyback Transformer


• Bad Deflection Yoke


• Too much oscillation on the Jungle IC


• Bad capacitors around the horizontal output transistor

Sep 27, 2012 | Jwin JV-TV9090 21 inch TV

1 Answer

I have a onida tv 21ess250bl .at standby position red light on but tv not on.selution this problem


your microchip in the power supply is bad or it can be horizontal output transistor.the flyback or diode 401.if you are not a tech have it repaired by one good luck.

Sep 13, 2011 | Televison & Video

1 Answer

Onida 21''ctv picture coming in stamp type {cutting from four sides}


Hello
Replace its Horizontal output Transistor. If the base-emitter junction has a leak inside it, this type of fault will occur. Before replacing it, check the main DC voltage to LOT [Line Output Transformer]. It should come around 102VDC. If there is not this much voltage, check the electrolytic filter capacitor connected across thie supply line to main negative for open or value developed. Replace the same is good. Till there is low voltage found, check the retifier diode that rectifies this 102 volt DC. If all the above are OK and still you get a stamp like raster, check the heat of the Horizontal Output Transistor described above. if it overheats, LOT is defective and should be replaced with same type and number. OK.

Jun 12, 2011 | JVC Televison & Video

1 Answer

29 onida oxigen h out complant


you mean a horizontal output transistor problem with your tv unit?. there are possible cause why a horizontal transistor get bad. it depends to what kind of trouble does the tv unit have. here are some of trouble that i encountered of H-out problem and how i fix it
  • leak regulator transistor, the problem of the tv unit when you turn on it works but suddenly shut down then the horizontal output get bad. now how are you going to know if the transistor is leak and shorted. by means of a digital multi tester or an analog tester. a good transistor must have a reading of .4 to .9 in a digital tester below or above to the range is said to be leak transistor. a regulator transistor is usually found at power supply section. how to test a transistor using the digital tester. get the tester and then pull out the transistor to chassis board. vinceisaac_24.jpg as you can see in the image above is a digital tester some other brands may vary in ranges but all the function are the same. now set the pointer to the resistance checking select to the range with diode sign. a transistor have 3 pins for base, emitter and collector (component term ) with the use of test probe now touch one end of probe either of the 3 pins and other probe to the other pin.check the reading to the display of tester if no reaction reverse the polarity until you find the correct reading as what i said a good transistor is about .4 to.9 and then try this process to the other pin of transistor to check if all the junction are good.
  • defective deflection yoke, the problem with the tv every time you turn on unit the horizontal output get damaged. a deflection yoke composed of two windings for vertical and horizontal coil ( technical term ). now how will you know if the coil has problem. a yoke has 4 wires, 2 wires for vertical and the other 2 wires for horizontal now with the use of digital tester set the pointer to the resistance checking either in a lower range. touch with the test probe either of the 2 wires check the reading if 0000 that means shorted sometimes cause by an over heat the insulation get damaged. repeat the process to the other 2 wires, a good coil at least has a reading about .5 to 1 ohm for horizontal and for vertical around 1.6 to 6 ohms it may vary depending to the yoke needed by the tv unit. vinceisaac_25.jpg the image above is sample of deflection yoke it was located and installed at the neck of ( crt )picture tube. if one of the coil winding has problem it always damaged horizontal output transistor and other part . i hope this trouble that i encountered will help you too to fix your problem good luck.

Jun 03, 2011 | Televison & Video

1 Answer

No sound coming from speakers Blaupunkt GTA470 Amp


Amp Failure:
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure. Transistor Failure/Checking Transistors:
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.

Dec 31, 2008 | Blaupunkt PCA460 Car Audio Amplifier

1 Answer

Amp turns on just fine but no sound comes out


Amp Failure:
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure. Transistor Failure/Checking Transistors:
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.

Seems as you have blown an output. Seek repairs.

Dec 29, 2008 | Power Acoustik A3000DB Car Audio Amplifier

2 Answers

Rca 2006 32v434t dead shorted out put


One special transistor is there. Before you change the transistor please sure that this is the first time problem or repeat H output TR failure. If it is first time means simply change the special type of transistor C5591. This is the high current rated tr and Panasonic is the manufacturer. Repeat H out failure means do the following simple works. If there is any capacitor between H sync output from Ic and horizontal drive transistor. Reduce the mf value and slightly increase flyback capacitor value. And then put the new horizontal output transistor.

Sep 06, 2007 | Proscan PS36800HR 36" TV

1 Answer

1996 Sony 32" Trinitron - Suddenly lost picture and sound


The most common problem with TV was the failure of the Horizontal Output Transistor, this will also damage 2 transistors in the power supply and a resistor in the power supply also. (From memory): Horizontal Output location # Q501, 2 power supply transistors Locations Q601, Q602, and resistor Location R607. Also solder the Horizontal drive transformer, you can find it by following the circuit board from the base of the Horizontal output. Some models used an IC instead of the 2 transistors in the powersupply, it will have six legs and check like 2 transistors. Good Luck.

Jun 04, 2007 | Sony KV-32S26 32" TV

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