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LG DU52sz61d - Just changed bulb and the picture is still real dim

Except for a two inch vertical strip on the right hand side.

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Why my t.v screen is one inch less from down side?


Vertical scan output section circuit fault.
http://electronicshelponline.blogspot.com/
Visit this site to get more details.

Feb 19, 2015 | Standard (CRT) Televisions

1 Answer

Picture went black except for partial green and blue lines &2 thin red lines


Vertical scan section circuit fault. Check and replace damaged component/s at its vertical scan output section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Jan 17, 2014 | RCA MM36100 36" TV

1 Answer

My Mitsubishi Black Diamond Television Model BDS2151S has a green strip of about 4 inches along the top of my picture. I imagine this is a tube problem but was curious if it was fixable, expensive to fix...


F. lonergan,

The problem is not verry serious, the problem is in the vertical deflection cct. change elctrolytic
capacitors which is in the vertical supply.

Apr 08, 2011 | Standard (CRT) Televisions

1 Answer

No picture just on line in the middle left to right


I know the line is horizontal but the problem is in the "Vertical" circuit of the set that deflects the picture from the middle of the screen to the top and bottom.

Only a few easy possible reasons for this.

1) set has developed bad solder connections in the vertical output circuit--it happens as a normal thing and most sets like this the picture will have opened and closed before going to just a line.

2) a part in the vertical output circuit is bad---most common is a IC chip for output. Not real hard to get at or replace and is inexpensive.

If it is as stated here a 27 inch set it may not be economical to fix and cheaper to just consider replacing it.


Let me know if you have questions.


SD TECH

May 02, 2010 | Sansui 27 inch TV

1 Answer

Very dim picture but bulb is good


Hello onsitecomps/David
With all of this bumping and knocking, still the problem you are having should not be occurring. This is due to the fact that the light engine is basically protected from that kind of activity. Now I feel that I have to explain how the light engine works, because there are a few things I am going to ask you and I want you to know why I am asking you these specific questions.
First of all a light engine works in the following manner:
A digitized video signal is sent into the signal and control bus of a DLP processor the signal is used to activate the transistors that control the mirrors that reflect light from the light source (the bulb) to the screen (more explained in next sentence) of the TV. The light from the mirrors then is reflected into a color wheel which spins at a rate which allows the individual monochromatic lights from the mirrors to be reflected with its proper color sequence (this is what creates the color picture from the monochromatic light from the DLP processor). This is a high level description, yet it is accurate for the questions I am about to ask.
1) Is the color wheel moving? (you can tell because it will make a fan like noise when it is turning)
2) Is the bulb at its proper luminance? (you can tell by using a light meter)
3) Are all the lenses in place? (you can tell by opening the light engine and inspecting the lenses)
4) Is the light from the bulb striking the DLP processor mirrors? (This sounds like what is not happening in your case, this or the processor is bad, being blocked by an obstruction, or out of alignment)
I believe that the last question is what is happening in your case, please correct me if you think that my assessment might be incorrect.
As for doing any of the work yourself, I would advise against this because this is what may have happened in the first place with the first owner. (who knows for sure). I would suggest getting this repaired by a qualified TV repair shop since the placement of these parts and the handling is very critical. If you do plan on doing this yourself you will need the following items:
1) voltmeter (to measure the voltage levels on the DLP processor, and the other points on the circuit board)
2) schematic diagram with service manual (To see where parts are located and to indicate where test points are)
3) light level power meter or you can use a temperature meter and do the conversion formula for watts to lumens (heat energy to light energy)   4) Ohmmeter (to measure resistances of components and circuit devices)
5) Signal generator (to create/generate a reference signal source with which to test against)
Now, if you know what these pieces of test equipment are and how to use them great have at it, if not, my original statement hold true: get a qualified TV repair person to take care of this issue.
I hope this helps,
Thank you,
Shuttle83

Jul 23, 2008 | LG DU-52SZ61D TV

1 Answer

Polaroid ttm-2401


To me, sounds like a picture tube issue. horizontal / vertical controls don't fix it. then its dead.

Jun 22, 2008 | Polaroid TTM-2401 TV

1 Answer

Jvc model av36230


you know its in vertical section, try to look for a capacitor and changed it, this is more of a capacitor problem.

May 16, 2007 | JVC AV-36320 36" TV

2 Answers

Picture deterioration


Your whole problem my freind is dryed up capacitors. You should go, if you have the technical ability to replace these capacitors, to http://servicemanuals.net, download the schematic diagram, and start replacing the waveshaper capacitors in the vertical drive circuit.

Sep 23, 2006 | Sony KV-35V35 TV

4 Answers

Sanyo TV model DS25710 or DS25730


Set has a bad vertical sweep IC. Also This Sanyo has a tendancy , when the IC blows out , to take the fusable resistor in the sweeo supply that feeds the vertical IC. This set should only be serviced by a trained technician because of ther high Voltage that lingers within. This repair should run you antwhere from 85.00 to 150 bucks. Good Luck

Jul 31, 2006 | Sanyo DS24205 24" TV

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