Question about Sony Televison & Video

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HORIZONTAL TRANSISTOR can someone please tell me the value of the original horizontal transistor of this model....thanks

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  • acgmanila May 22, 2009

    thanks for the response/advice bro....i really appreciated it..

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There is no generic Horizontal Transistor for all Sony Televisions. Having repaired many different tyupes of sets over the years, the only thing that will help you is a set of schematics, and the model numbers on the transistor. You will need the schematics to find/check the other components in the display circuit that may also be bad. Very rarely did I just need to replace a HT without other power supply components as well.

Nowadays, it really does not pay to bother opening most CRT sets anymore. If you can get the schematics, you usually spend $25-$35 just on those, before you get into the actual repair.

Posted on May 22, 2009

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1 Answer

What's the cause I already install three horizontal output of Samsung TV model number CT-15N30MJ always busted horizontal transistor?


Check the capacitor connected to the collector of the horizontal output transistor to ground for loose solder or open. Replace that freewheeling capacitor [ usually comes between 3900Pf to 9600Pf 2000V]. Replace it with an other one of same capacitance value; before proceed. Even if it blows out the horizontal output transistor; entire circuit should be checked. Check the deflection coil too for shorted winding.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

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Sunsui tv model dftv270 turns off by itself how do i fix is


There are several versions of this model. They all have the same problem. The problem I'm speaking of , the location numbers of bad capacitors. So I will give you values and you will need to search and replace these. Find an ESR meter to locate bad capacitors. In the vertical deflection look for 50 volts at 4.7Mf, 35 volts at 100Mfs,50 volts and 25 volts at 1 Mfs. Be sure to resolder the vertical IC and don't solder the pins together. Find the smallest electrolytic caps valued at 50 volts 1 Mfs and replace these. These are scattered through out the main board. Other small caps include the 25 volt 10 Mfs, several of these as well. You also may want to inspect the capacitors near the flyback transformer and horizontal transistor and the horizontal output transistor. You will have to seek and find the weak or bad caps here. I will tell you, the shut down is mainly a capacitor issue. Caution is required when you remove these. The circuit traces in these TVs are very delicate and you can destroy this TV in seconds.Thanks for asking me and show all hands of support!

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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

Pls help me to solve my problem.why the horizontal out always short the B+ is normal 95v? thanks.


Good day!

If the H-out is always short when you power the TV.If the TV can't stay the power for at least 30 minutes the problem could be the ply-back transformer is partially shorted,replace it with the same type,ratings and value.

Or if the power of the TV stays 30 minutes and above before the H-out is shorted.Please check the H-out if it is original or generic because generic H-out transistor is easy to over heat than to the original.Better to check the transistor if have a numbers or letters on the dots that found on the front of the transistor.It is very tiny use a magnifying glass to see it.If the transistor have it,it is original if none it is generic.

I hope this information will be helpful.Thank you and good luck.
And don't forget to rate my answer.

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When it is shifted to right vice versa, it indicates a distortion on the horizontal output. Try replacing all the capacitors around the horizontal output area with the same original value. Make sure the horizontal output transistors you replace hasn't started going gone bad already if you know how to check them. Them dimness in the picture is caused by the horizontal output not putting enough high voltage to the CRT. Look for leaking capacitors too. Also replace the resistors around the horizontal output, they may have burnt out or changed in value from overloading cause by the malfunction of the flyback, and the transistor.

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1 Answer

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IGBTs do not work well at high frequencies. They are not very linear, either. Even if it works, you'll likely wind up with a compressed and distorted picture.

Just put in an equivalent output transistor and call it a day.

Peace.

Marco

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