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The green and red gun is weak, the glycol leaked over a board and shorted out

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  • sharnitaking Sep 04, 2008

    model number is-:SP-54T5HP

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Whats the model number of your set. please respond to this same post when replying

Posted on Sep 03, 2008

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Blue green and yellow base picture no red colour


This could be from a couple of reasons. It could be a transistor, or resistor on the neck board that controls the red gun on the tube if it is a tube tv. It could also be a weak red gun in the tube itself and may need rejuvenated. Or maybe it can also be a bad solder joint on the PCB that connects the yoke connector.

Oct 28, 2012 | Televison & Video

1 Answer

I have a Mitsubishi, probably since 2001. About 18 mos ago the problem began suddenly with no audio and no video. In checking I have been told it might be a convergence fix, however I get the code 2-4


2,4 is vertical problem.

The set will blank the 3 picture tubes but usually you will still have sound.

Another issue with these sets is GLYCOL which is a coolant much like anti-freeze but more concentrated and toxic that cools each of the tubes screens.

These sets had problems with it leaking from any of the 3 tubes down onto the boards---With speaker grill pulled off the front and the inspection plate behind it removed you from the front will see 3 large circuit boards.

The necks of the tubes are hanging down and the vertical circuit is on the middle board near the very front.

Some models if you look up the neck of the tubes will have a plastic tray to catch any Glycol--others do not-----those can get Glycol onto the boards.

Carefully look for any signs of liquid--does not need to be much and if you see signs DO NOT TOUCH IT WITH YOUR HANDS as it will be absorbed into your body and is very Toxic.

This is the reason many landfills will not accept this type of set.

The Glycol is a clear liquid not unlike mineral oil in appearance--anything it gets on gets shorted as it is conductive.

Again, looking from front (middle board a tan color and board to right is green---) the green board to right is signal and process board--if glycol there it will look tarnished where connections are or even a white residue on the board.

If no Glycol the vertical circuit is causing this.

If Glycol on the vertical circuit it can be removed with water and dried--then the real issue is what to do about the leak.

I have answers for that but you need to see if GLYCOL is your problem.

YOU HAVE TO LOOK VERY CAREFULLY FOR THE GLYCOL as it is easy even for someone like me who has seen hundreds of these sets with leaks to see sometimes.

SD TECH

Apr 21, 2012 | Mitsubishi Televison & Video

1 Answer

What couses red diagonal line and red back ground picture on my toshiba television.


short on crt board check driver transisters on crt board if you want to confirm then switch them with green gun transisters from crt just swich them and see if next coclor show difrent if yes transister bad if not open crt cathode from red side to see if crt cathode shorting

Mar 05, 2012 | Toshiba Televison & Video

1 Answer

WS-65819 Shuts off


Yes, remove front speaker grill (pulls off) and inspection plate behind it.

There are 3 large circuit boards as you look from the front---signal to the right, power to the left and Deflection (vertical and Horizontal) in the middle.

What you want to look for is on the middle board any sign of GLYCOL which sometimes leaks from the picture tubes above it.

It is a clear liquid and even tiny amounts can short or stop the board from working; most damage should be in first 3 inches from front of the board----if you find any DO NOT TOUCH IT as it is toxic.

Glycol damage is not uncommon and the first thing you want to look for.

Jan 26, 2012 | Mitsubishi WS-65819 TV

1 Answer

Our Samsung slim fit t.v. is displaying a completely RED picture. Any trouble shooting tips?


if the problem is always red picture every time you open your TV unit i may say that there is problem in your CRT chassis board or at chroma driver. open your unit then pull out the chassis board clean with lacquer thinner and then check possible loose contact re soldered parts at color amplifier section and parts at chroma board which is the driver of red, green, and blue gun. it is connected at the neck of picture tube. after you try all this option test your unit then observed if it is ok now. if still doesn't change red picture again check defective parts at chroma board pull out the driver transistor of green drive since the problem is reddish so there is no green drive check if it is leak or shorted also check open resistor. also you need to consider is the voltage of all the driver transistor are almost the same to have good picture.

Apr 09, 2011 | Televison & Video

1 Answer

Coolant is leaking onto circuit board and shorting it out


Glycol leaks can be a problem. How bad is the leak is it dripping on the boards. This stuff that s leaking is called glycol conductive anc corrosive. keep the set upluged. The seals in the crts have failed. they would have to be replaced. Very involed repair. it involves removing the tube and removing the glycol removing the seal cleaning the tube replaceing the seal refilling the tube putting the tube back in and aligning. at the shop such a repair is about 2 to three hours..if THE GLYCOL has leaked on the board then the board could have been damaged. AT this point you have to ask if it is worth it. always get a profesional to do this type of repair. i dont say this often but this is not a fix it yourself

Mar 18, 2009 | Sony Televison & Video

1 Answer

Jvc rear projection problem


the problem you are having is the convergance amplifiers have failed there may be some resistors and fuses blown also.
now, this can be caused by coolant leaking from the guns shorting out the board.you may investigate this yourself by unplugging the set open the back and check for fluid leaks around and under the CRTs and on the main board. if it is present don't touch this fluid (eytholene glycol sorta the same stuff you use in your car coolant). if it is there then yes you are looking at a high cost of repair, but if not your looking around $350.00 or so.

Feb 26, 2008 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Fluid Mold


yes it more than likely is related to the spill.
this model is famous for fluid leaks. each projector1.gif tube has a reservoir on the front of it with a fluid in it. this keeps the face of the tube cool.
this depends on how bad the damage is in the tv. in most cases we can reseal the tube and clean up the fluid 400-600.
Once you
take the tube out you will see where it leaked. The problem is that the
frame on the CRT that the heavy screws with springs are mounted on (that
hold the lens coupled to the CRT) is weak and they can bend. We have seen
several that have leaked after the customer moved the set. You can only
tighten them down so much because the frame bends. It is just stamped metal
and not welded at the corners to support the bend.

We remove the CRT, clean it all up, add a very small amount of RTV sealer to
the gasket, reassemble, let the RTV cure thoroughly and refill with coolant.
The extra sealer should prevent future leaks. Haven't had a recall yet.
Mits says replace the CRT...too costly.

You msut check the yokes carefully as well. If any coolant gets into them
you can end up with shorts there and a mess.

Clean the boards carefully and repair any corrosion damage. The coolant is
ethylene glycol and glycerine which is water soluable.

Feb 08, 2008 | Televison & Video

1 Answer

No red, orange, pink or green color!


Sounds like your green tube is low or is bad
Mitsubishi > VS XXXX
this model is famous for fluid leaks. each projector True True (``````````` (``````````` 0 95250 95250 clip_image002.png tube has a reservoir on the front of it with a fluid in it. this keeps the face of the tube cool.
this depends on how bad the damage is in the tv. in most cases we can reseal the tube and clean up the fluid 400-600.
Once you
take the tube out you will see where it leaked. The problem is that the
frame on the CRT that the heavy screws with springs are mounted on (that
hold the lens coupled to the CRT) is weak and they can bend. We have seen
several that have leaked after the customer moved the set. You can only
tighten them down so much because the frame bends. It is just stamped metal
and not welded at the corners to support the bend.

We remove the CRT, clean it all up, add a very small amount of RTV sealer to
the gasket, reassemble, let the RTV cure thoroughly and refill with coolant.
The extra sealer should prevent future leaks. Haven't had a recall yet.
Mits says replace the CRT...too costly.

You msut check the yokes carefully as well. If any coolant gets into them
you can end up with shorts there and a mess.

Clean the boards carefully and repair any corrosion damage. The coolant is
ethylene glycol and glycerine which is water soluable.


Nov 19, 2007 | Mitsubishi VS-60707 60" Rear Projection...

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