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Horizontal transistor - Televison & Video

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2n3011 2n3055 are generic parts, really need make and model of the tv. Some sets are picky.

Posted on Nov 26, 2014

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Hi! i have hitach CRT tv has a problem of switching. the power supply is okay but there is no horizontal signal.I have changed the video amp TDA 8362 but still the same problem.


You need to check if you have horizontal drive to the base of the horizontal out transistor. With a scope check the primary and secondary of the horizontal drive transformer to find out where you are losing the drive.

Feb 01, 2015 | Televison & Video

1 Answer

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

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I loss the horisontal regulator of my philips tv with 25pt463a/7ir model


Hello
You are talking about the horizontal output transistor damage I assumes and post this solution. If LOT has internal winding short, the horizontal output transistor will get shorted. It will be best to replace the horizontal output transistor, alongwith the LOT

Mar 03, 2012 | Televison & Video

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When i turn on horizontal output tripping. B+ and low voltage ok


Hello
Check the LOT and Horizontal Output Transistor. If horizontal output transistor get shorted [collector to emitter or collector to base], this kind of fault will occur. Here there is nocollector to emitter short as B+ is ok. Check for collector to base leak. It is best to repalce the horizontal transistor with a new one, and switch on the Tv for a short while, say 10 seconds or so, and feel the heat of the replaced transistor. If it gets overheated, of LOT makes a whisiling of hissing sound, LOT is faulty, and shoul be replaced sith same type and number. OK.

Apr 17, 2011 | Sony PVM-14N6U TV

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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

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Red light comes on when powed up but then goes out when push ch button and thats it


Check the voltage to B+ on horizontal section, make sure the voltage is 115 Volt to 125 Volt, and also Check the transistor horizontal output, include Transistor horizontal driver. there must exist at the base of the transistor voltage of 0.5 volts -1.5 from IC Horizontal.

Sep 30, 2010 | Televison & Video

5 Answers

Horizontal output transistor keeps failing


The horizontal output transitor is always connected to the primary winding of the flyback transformer (via collector) and also to the horizontal deflection coil via an electrolytic capacitor. The most likely suspect for damaging the transistor is the fylback transformer. In some countries there are electronic stores that test flyback transformer by winding a few turns on the ferrite core and applying a test voltage. This test will only test the secondary. The primary winding is difficult to test for turn to turn short because the resistance is quite low and you do not know the 'good' resistance.

May 15, 2007 | ViewSonic E70f 17" CRT Monitor

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