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I want to know the model no. of line output transformer

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Google the model number with line output transformer in the search line.
That should do it.

Posted on Jan 03, 2011

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1 Answer

What is the name line output transformer(L.O.T) for LG colour tv circuit?


Line Output Transformer [LOT]. 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/

Dec 16, 2014 | LG Televison & Video

1 Answer

There is a malfunction in the THT


Hi Hashim.
EHT (Extra High Tension) usually reefers to the 24kv to 30kv, focus and first anode (A1) voltages required to operate the crt (picture tube). These voltages are supplied by the line output stage, primarily the line output transformer (often refered to as the flyback transformer). This transformer steps the voltage up to 8kv and an embedded rectifier trippler circuit tripples this to 24kv dc to supply the final anode voltage to the tube (Hence the big rubber cap and thick cable.
The line output transformer is driven by a smaller transformer (line driver transformer) via the line output transistor.
The driver stage is fed by the hoizontal oscillator circuit.
So we can see that a failure in any part of this circuitry will most often result in no picture. The line output transformer is the heart of the system, it not only supplies the EHT voltage it also has to
supply an LT voltage for the vertical output stage but also the sound output stage.
A Fault in the A1 circuitry would result in a very dark picture but sound ok. Or the picture badly out of focus.
The line output transistor going short circuit results in no picture and no sound with the set shutting down to the standby mode or
hic upping (making a ticking noise. This problem would be amongst the most common and is easily confirmed with an Ohm meter. The line output transformer itself can develope an internal short with the same results (less common). Failure of the line oscillator and driver stages are most easily confirmed with an
oscilloscope. A fault in the power supply will also give these symptoms. To confirm line output stage is functional look to see if the tube heaters are glowing, this supply also comes from the line output transformer. Can you feel the static if you run the back of your hand across the front of the screen (often feels like running your hand through cobwebs. this would indicate that the EHT is present and the fault is elsewhere. Understanding how something
works enables you to find out why it doesn't. If you have occasion to replace a short circuit transistor, be sure to reslder all pin connections to the line driver transformer. I've found dry joints here
to be a cause for random inttermittent failure of this transistor,
Best regards from Vintie.

Jan 07, 2014 | Sony WEGA® KV-XR25M80 TV

1 Answer

Sony tv model kv 29m87


Contact the authorized service center for Sony.

Jul 15, 2013 | Televison & Video

1 Answer

I have trace lines on da screen


The 'Screen' voltage to the picture tube is more than normal. You can adjust this voltage by built in pot meter along with the line output transformer, inside the main circuit broad. But do this work you must nave knowledge in electronics, and work experience. It is fatal try to adjust this voltage, because, the set must be powered On, while you adjust this voltage. The pot-meter can be located on the Line Output transformer itself, marked as 'Screen"

Jul 19, 2012 | RCA Televison & Video

1 Answer

Dc shut down


Check the LOT [Line Output Transformer] and [HOT], Horizontal Output Trnasistor for fault. In most cases, collector to Emitter junction of the horizontal output trnasistor found faulty. Replace it first. If it do not help you, replace the Line Output Transformer.

Mar 22, 2012 | RCA Televison & Video

1 Answer

TV COMES ON BUT GOES BACK OFF


Line output transformer ro Line output transistor to your tV is faulty. Just replace the Line putput transistor first. If it do not help you, replace Line output transformer {LOT}.
Image of LOT is attached.3_17_2012_5_07_58_am.jpg

Mar 16, 2012 | Televison & Video

1 Answer

I just want to know, what is the part number of flyback transformer on my teli panasonic TC-20P1.


Part number is required only if you are ordering with the company and here in this case you can specify the model number as the data base is available with them.
Otherwise the flyback/ line output transformer can be removed and taken to any spares shop to be identified for the replacement.

Jun 15, 2011 | Panasonic Televison & Video

1 Answer

We replaced the transformer for our RCA F27650. It was sparking and now it is not, but now the screen won't turn on. It is just black. We hookd all the wires up like they were. we can hear sound, but...


Hello
Along with the flyback transofrmer, its horizontal output transistor also must be replaced. I don't know whether you have replaced it or not. If not, replace it too. It can be located very near to the flyback transformer, a three terminal component, black in colour, usually screwed to a metal heatsink. Then switch on the TV and measure the video output voltage at the video output card pluged directly to the picture tube neck. The collector of the video aoutput transistors must come around 145VDC. If it also is there, advance the screen control on the flyback transformer to get a raster. If that voltage is not there, it means that the flyback transformer is not working, and horizontal oscillator stage should be checked for oscillation, check the lined drive transformer for its primary winding open, Check the entire horizontal oscillator section. The collector point of the line drive transistor, the transistor that drives the line drive transformer, a small transformer soldered diretly to the printed circuit board; should be checked with frequency meter. The frequency at that point should come around 15525HZ approx: OK.

Mar 19, 2011 | RCA F27650 27" TV

2 Answers

I need a transformer


Hello
It is not clear from your post, that which transformer part number you wants to know. Anyway I'm hereby send you the part numbers of it two main transformers.
[1] Horizontal Ouput Transformer, or Line Output Transformer or Flyback transformer [HOT or LOT or FBT]; Part number is (257807)
[2] Switeched Mode Power Supply transofrmer [ SMPS transformer]: Part number is (257807)
OK.

Dec 16, 2010 | RCA F36650 36" TV

1 Answer

Sony boombox model cfs-b11 transformer


Your tape requires 9 volt transformer as shown in below schematic..

7676255.jpg

Part number is 1-450-016-11

Mar 05, 2009 | Sony Audio Players & Recorders

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