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Dead set value of horizontal transistor

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You're going to need more info than you provided, there are hundreds of h.o.t.'s for t.v. sets you need make/model #'s

Posted on Oct 02, 2009

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29pt5301/15 chassis GR2.4AA Dead only flashing red LED standby. 148V on transistor horizontal, and 38V on transistor vertical is ok.


Check the frequency at the base of the horizontal output transistor. It should be in betwen 15.5 to 15.7 KHz. If you want more details about service help, try any service help sites. There are so many can be at internet.

Jun 12, 2012 | Philips Televison & Video

2 Answers

I troubled samsung tv the horizontal transistro was exceed heat


It is because the flyback is drawing to much current and it needs replace, and if it still drwing tomuch current,you could have a bad picture tube.

Apr 09, 2012 | Televison & Video

1 Answer

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

HORIZONTAL TRANSISTOR


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.

May 22, 2009 | Sony Televison & Video

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Dead set!


First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..


Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

Jul 30, 2008 | Televison & Video

2 Answers

Dead set lg studio works v452 monitor


lg g505 this moniter 5 or 10 mnt woking then hot transister is damaged why this problem ?

Jan 26, 2008 | LG Studioworks 45 14" CRT Monitor

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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