Question about JVC AV-27230 27" TV

1 Answer

JVCAV-N2043TV,Horiontal Output Transistor burns out everytime if fix a new one

Horizontal Output TransistorD1875 burns out whenever i fix a new one. It only takes two hrs for Tv to switch off.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Contributor
  • 31 Answers
Re: JVCAV-N2043TV,Horiontal Output Transistor burns out...

Hi There,

The Hor Output transistor is connected to the Line Output Transformer. This transfromer provides a lot of voltages around your TV set but includes the very high voltage to the Picture tube...

These transformers are specially tuned to resonate at a certain frequency,
The Hor output transistor needs to match this if the wiring inside the transformer is shorted by "just a bit" the picture will be visible but the transistor is struggling to match the transformer impedance,from the mismatched the transistor draws more current from the power supply.. runs hot then burns out...

Usually manufacturers provide a Trip circuit that detects that an overload on the power supply is occuring and cuts the power to the Line output stage ...this is usually detected by a clicking sound within the power supply its called hiccuping.

If some one has altered the correct setting on the power trip circuit then the next thing that happens is the Transistor goes Blooooey like in your case.....

So to save you a lot of money replacing the output transistor
please replace the output transfromer as well next time...

But please... please... re-check the power supply trip circuit to save you a lot more expense in the future....

Best Regards From YUBEUT

Posted on Nov 10, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

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

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 | Standard (CRT) Televisions

1 Answer

Will not come on. light blinks 6 times

Six blinks denotes the absense of horizontal sweep. Check the horizontal output transistor, whcih can be located very near to the LOT [Line Output Transformer]; for short. If it is shorted, LOT must be suspected. Replace the line output transistor with a new one, and switch ON the tv for a short period of time, say 6 seconds or so, and check the heat of the replaced transistor. If it overheats within this time, be sure that LOT is damaged; shorted inside; and should be replaced with same type and number. If a digital multimeter which can measure frequency is available, take the frequency at the collector of the horizontal driver transistor. It should come around 15525Hz. If not replace the jungle IC. OK.

Jun 19, 2011 | Sony FD Trinitron KV-32HV600 32" TV

1 Answer

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

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

1 Answer

The TV will not turn on. It blinks in standby for 6 times and shuts down.. Unit is about 10 yers old.

6 blinks = No Horizontal (H STOP), no raster, goes to the blinking self diagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206 (or similar component references for your model) and replace flyback transformer if required.

Generally, whenever horizontal OCP (over current protection) occurs, the primary cause is usually the flyback transformer (these short circuit/burn out), the horizontal output transistor(s) and the tuning capacitors in the transistor(s) collector circuit must all be replaced together. It is also a good idea to check the ABL (or beam limiter) circuit as components may have been compromised in it due to the failing flyback.

You could take it to a service centre and obtain a quote for estimated repair costs, then you can decide afterwards if it is worth repairing or not. It may not be economical and/or expensive.

Mar 03, 2011 | Sony FD Trinitron WEGA KV-34XBR910 34" TV

1 Answer

Audio and picture go dead red light blinks 7 times

A protection circuit has cut in - possibly due to a fault in the line output stage (flyback transformer could be short-circuit and horizontal output transistor could also be shorted).

Assuming the power supply/HT rail is all OK, replace the above parts, touch up any suspect solder joints, check and replace any capacitors (electrolytic and the tuning caps in the collector of the horizontal transistor - always replace these caps (rated at around 2kV - 6kV) whenever you replace the flyback)

Jan 24, 2011 | Sony FD Trinitron KD-36XS955 36" TV

1 Answer

H out transistor defetive & number missing plz solve


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

I have a Sony Trinitron 34" tv. It will not turn on. The red light blinks 6 times then pauses and blinks 6 times again. Is this an easy fix or time to get a new t.v.?

ur tv has problem with horizontal output stage. check the horizontal output transistor. if it found short replace the same and switch on the tv. if the same fault occur again, then the lot (line output transformer) may be faulty. also check for any dry soldering in the power supply stage and horizontal output sage.

Jan 03, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Hi My toshiba CX36H60 has a problem -- no picture but sound is good. what could be the issue and how to rectify it. Please suggest.

As sound output is ok, main board is correct with respect to sound output, video IF and ther stages. The fault lies on the horizontal output section. It may be LOT fault. Check it further for horizontal oscillator stage, and horizontal output stage. Check the collector voltage at the horizontal driver transistor. If you have a frequency meter, check the frequency of that point. It should be somewhere near 15625Hz. If the frequency there is Ok, then proceed to horizontal output stage. Check the horizontal output transistor. If it seems to be faulty, replace it with similar type and number. If the replaced horizontal output transistor heats abnormally within seconds after swich on the set, surely LOT has troubel. Replace it also with same model mumber and type.

Oct 16, 2010 | Toshiba CX36H60 TV

2 Answers

RCA big screen tv

whenever fuse blows every time it is the indication of short circuit in tv. so please do not put fuse unless you know the cause of blowing fuse. these are the reasons of blowing fuse. 1 main filter cap.short. 2 rectifier diode short. 3 swithing transistor short 4 horizontal output transistor short 5 caps & diodes connected to flyback transformer short. 6 print short. 7 at last if every thing ok then flyback transformer defective. hope this will help. if you are not a tech person call skilled tech to fix it. good luck

Sep 24, 2007 | RCA P60828 TV

1 Answer

Tv problem

The F27442 uses the CTC203 series chassis and that symptom is very common. If the horizontal output is shorted you MUST resolder the coil in series with the base of that transistor and the pins of the small horizontal drive transformer. When they have been properly resoldered you can put in a new original horizontal output transistor. If the output transistor shorts out again then your flyback (high voltage) transformer is shorted and needs to be replaced.

Aug 08, 2007 | RCA F27442 27" TV

Not finding what you are looking for?
JVC AV-27230 27" TV Logo

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Standard (CRT) Televisions Experts

The Knight
The Knight

Level 3 Expert

66413 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

Are you a JVC Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides