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51H93 HORIZONTAL OUTPUT TRANSISTOR FAILURE - Televison & Video

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  • Anonymous Mar 03, 2009

    when i turn my set on its making a popping sound and will not come on

  • sonale May 11, 2010

    I am using an opocoupler for line driver. The transistor section is driven by 11volt. SOme transistors are used to drive the line. They are failing. Could you please tell me the reason.

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What's the question???

If the transistor has failed, it has to be replaced. The cause must be found and fixed before applying back the power, or the new replacement will probably soon fail.

Jerry G.

Posted on Apr 16, 2008

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HOT transistor TT 2222burn after second replace. TV Samsung Model CS-21Z45MJ


Hello
Before replacing an other one, replace the freewheeling capacitor, the capcitor fitted between the collector of the 2222 and earth; usually of a value of 3500pf 2000VDC, some times this value may differ from set to set. If this capacitor has opened of developed in value, the result will be the failure of the horizontal output transistor, at switch ON itself. The second reason is the short in horizontal yoke windings. Even one winding get shorted, it will cause to a heavy load flyback transormer which in turn to 2222 failure. The last reason for this fault is defective Line Output Transformer itsef. Check these three.
Before proceeding, desolder out the horizontal output transistor 2222 fro circuit, and measure the frequency at the collector point of horizontal driver transistor. It should be around 15625HZ [may differ a little], with no signal. If this frequency is found higher than normal, The main IC jungle should be suspected.
Anyway, go forward after checking this frequency. OK.

Jun 10, 2011 | Televison & Video

1 Answer

Red light flashes six times


6 blink's means H stop or Horizontal Drive failure. Check the Jungle and its soldering connection terminals for possible bad soldering or loose connection. In some cases jungle ic found defective.also check your horizontal drive transformer windings and connection that is connected at the base of horizontal output transistor. Open winding or loose connection would result to absence of horizontal drive at the base of horizontal output transistor..

Feb 13, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

H out transistor defetive & number missing plz solve


Hello

The horizontal output transistor number for Sony KV-ES34M61

Horizontal output - [Q6807] == 2SC5480-01
Pin output - [Q6808] == 2SC5480-01 Again

Please replace bothe the transistor at the same time. Check horizontal output transformer [LOT of HOT], for any defects.. Ok

Jan 06, 2011 | Sony KV-ES34M61 34" TV

1 Answer

Tv will not turn on even when reset button is pushed all you hear is a clicking noise


You need to replace the power supply on your set, this happen when horizontal output fail.

Dec 18, 2010 | Toshiba 51H93 51" Rear Projection HDTV

1 Answer

Aiwa tv-14ST3 horizontal output always shorted


Hello
If horizontal output gets shorted always, something may be wrong with Line Output Transformer [LOT], or deflection yoke. If LOT windings inside is short, hrozontal output transistor will get overheated, and will be get shorted soon. If there is winding short in the Deflection yoke, even a sinlgle winding gets shorted, it puts a great load on LOT, which in turn effect horizontal output transistor. The third main reason for horizontal output transistor failure is due to an open or dry solder at the capacitor connected to its collector to negative It will be usually 2500pf to 3500pf, according to the TVs screen size. You just check these three and be sure about the fault.
Ok.

Oct 26, 2010 | Aiwa Televison & Video

1 Answer

What is the problem if only retrace line appears on screen and without picture output? what circuit has a problem if b+ voltage increases up to 150vdc and it kills the horizontal output transistor...


1. Check the opto coupler in the SMPS circuit. Replace it with
new one. DO NOT SWITCH ON TV WITHOUT OPTO COUPLER.
This is feed back, to the switching transistor to control the oscillator.
2. Horizontal out put transistor going defective.

This is due the failure of diode near the EHT coil primary and
the transistor. The reverse leakage of the high voltage diode can not be
checked by the meter. Hence replace all the black coloured diodes
in the horizontal deflection circuit diodes with identical part no.
Horizontal out put TR will get over heated and will rupture. When you
replace with new transistor switch on TV and switch off immediately.
The heat sink should not get heated or warm up. This is the only way
you can protect the transistor when you replace other components one
by one.

After checking all the small components, finally EHT coil.



p

Aug 19, 2010 | Televison & Video

1 Answer

Toshiba 51H93 .


check for cracks in the driver circuit, also i believe this maybe on of the models that had a kit that helped from driving the h-output to hard causing it to get hotter then normal.

Apr 11, 2008 | Toshiba 51H93 51" Rear Projection HDTV

1 Answer

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.

Apr 09, 2008 | Toshiba 51H93 51" Rear Projection HDTV

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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