The phosphors all appear white, (I bet with a green trace) I could use a bright light this evening when it is dark to check. It looks like the fluid is mainly for color rather than cooling. I found a reference to a post dated 6/19/2002 at avsforum on how to repair a SD-187 that has leaked, and caused a "fungus" type of appearance in the display. From what I gather, the fluid can be drained, and the front shield removed, but I would have no way to experiment with it.
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Guys -- these SD187 tubes, at least in sony units, are easy to de-fungus. I dont imagine it to be different in any PJ that uses this tube other than the physical removal of the tube from the PJ. It does take some prep and might span several days, but total time should only be about 1-2 hours per tube once removed.
The first set I ever did was based off threads here. Until reading the threads I just swapped tubes. Now I wish I had all those tubes I tossed. The following is based in part on those threads and from my personal experience. If this is your first go round, do one tube at a time.
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First round up a razor knife, some black RTV silicone, fish air line tubing, a syringe if available, a Pyrex dish (LARGE), some dish detergent, a green scrubber thingy (NOT the harsh kind; get the soft one so you cant scratch glass!), one bic pen (the cheap Bic Stick type you can pull the ink insert out of) and finally, some coffee filters. I might be leaving a few things out...
Remove the bic pen ink tube. Carefully cut the ink tube (not the part you hold onto) so that you have about 3/4 inch of clear hard tubing without ink. Toss the pen carcass. From here on out this 3/4 inch X 1/8" (aprox) tube will be called the bic pen.
Attach 1 foot of air-tube to the bic pen tube. Silicone the seam of the tubing/pen and allow to dry overnight. The air tubing (end without the bic pen ) should be able to slip on/off the syringe (obviously without a needle) as-is. A "turkey baster" or similar device will probably work in place of a syringe. Congratulations. You just made the easiest adapter possible to (reasonably) fit these SD-130 and SD-187 tubes, and it will probably work for others.
Remove tubes from the PJ. I unsolder the wires from the magnetics so I do not need to remove the magnetics from the tube. You can also slide the magnetics off, but I think there is more risk in doing so. Make yourself a drawing so you dont forget which wires go where.
Get a deep pyrex type dish. Remove the two screws (fill holes) from the top of the tube. Make SURE you save the little gasket, else you will be siliconing the screws in place. Pay attention to how tight the screws are. Insert a long thin sewing needle into each each hole where the two screws were until you see the needle in the face of the tube. Remove the needle. Do this several times to clear the fill port so you can easily get the fluid in and out. Set your tube into the pyrex dish. The fill screws should still be removed. Tube may leak fluid- its OKAY! THATS WHAT THE DISH IS THERE FOR!
Grab your fish-air-bic-pen-silicone-contraption-hose adapter. Turn the tube sideways in the dish. Place the bic pen end onto one of the screw holes (which ever hole is higher up) and GENTLY blow air into the tube. Forcing air into the tube will build up pressure between the glass front and tube face, resulting in the fluid being rapidly ejected from the fill hole on the bottom. Tilt the tube as needed while blowing into the adapter to remove all fluid.
SAVE THE FLUID unless you are going to use new fluid. If you are going to use new fluid, skip down to the ________ line.
Now this fluid - argh what a slimy concoction it is... Cut a coffee filter so you have just a small portion of the cone. Paper clip the filter to the side of a glass, preferably something like a mason jar with a lid. I would not reuse the glass for anything else; dispose of it when you are done...
Take the adapter you made, using the syringe suck up some fluid from the Pyrex dish and place it carefully into the filter so that your cup catches the filtered fluid. It might take a LONG time for the fluid to pass through the filter. Don't rush it! Be careful- if *ANY* fluid escapes the filter and ends up into the cup unfiltered START OVER. Don't take shortcuts if you are filtering and re-using the fluid unless you are having a lot of fun so far. By the time you finish the few ounces of fluid, I think you will agree you don't want to do this again unless you are making $$.
Now that your fluid is filtered - and I am sure visibly clearer- put the cap on it (now you see why I said mason jar) and set aside. We will come back to it later)
___________ Skip down to hear if you are using new fluid_____________
CAREFUL! Insert a razor knife (The long thin kind) into tube between glass front and tube. Work razor back and forth carefully until the blade is visible inside the tube- then cut all the way around the face of the tube. You will reach a lip on the aluminum frame where the knife can not pass. Pull the glass black and cut the silicone in that portion until you have the glass off. Be careful not to gouge the aluminum or scratch the glass. If you made it this far, and the glass is in one piece, you WILL get the job done! Have faith!
Scrub the tube face and glass cover getting it reasonably clean, then dry it with whatever is soft and lint free.
Now take your razor knife and remove as much silicone from the glass as possible. Do the same on the tube frame, again being careful not to gouge the frame.
Clean the fill holes out again with a needle, then with water. I place tubes into a large freezer bag and the tape the bag to the back of the tube to keep the magnetics dry. Use a sink sprayer to spray the fill holes and frame with as much force as you are comfortable using to make sure the holes are clean. Its important to remove every bit of that silicone along with the dirt from the fill holes. Remember- miss one piece and you will be starting all over.
Now that you have the silicone gone and the fill holes are clean, scrub the glass front (both sides) and tube face and allow to dry. Repeat several times. I PROMISE no matter how careful you are you will NOT (no way, no shape, no how!) get the tube face and glass front free from all that crud the first go round. Remember my warning--- miss one piece and you will be starting all over.
Make sure everything has been dried. I use a hair dryer so as to not leave lint on the glass.
Okay- Now we are ready for the serious stuff.
With someones help- apply a 1/4 inch bead evenly, IT MUST BE EVEN, all the way around the metal frame where the OEM silicone was.
Important hint: If you get ANY silicone where it doesn't belong --such as a big glob on the tube face --- STOP, let the silicone dry, then remove it and start over. If you try to remove the silicone while it is wet you will make 100 times the mess.
Have someone hold the tube face up for you. Carefully center the glass front. PRESS the glass into place on the frame. Make sure you can see the silicone touching the glass 100% along your bead. Its okay if some of the goo comes from the edge of the tube, and a slight bit inside the face wont matter much either, as long as it doesnt extend to where your raster will be. Again, make sure you can see the silicone touching the glass 100% along your bead. It wont hurt to press the glass into place again, but dont try to slide it around or you will mess things up.
Sit down and hold your tube ( dont even go there!) face up for about 15 minutes. This will allow the silicone to "skin" and hopefully the glass will not slide all around on the next step.
Dont slide the face around to see if the silicone has skimmed! It will slide, and you will have a mess.
Place a soft dishcloth on the tube face. Take an old plate and place onto the cloth, again being carefull not to slide things around. Holding the plate in place to keep the glass front on the tube face, carefully set the tube FACE DOWN on something level. If you have goofed and slid the front glass around you will probably end up starting over. Placing the tube face down at this point will allow the weight of the tube to be applied to the face/silicone while the goo cures. Allow the tube to dry face down for at least 24 hours, preferably a couple of days. Dont even think of picking it up before 24 hours has passed. Its better to allow a couple of days, if possible, for the silicone to completely cure.
Now that some time has passed, pick your tube up and check your silicone job. If you are satisfied it will not leak and that no silicone extends into any part of the phosphor used for the raster, you are ready to proceed.
Hint: Too much silicone around the edges can be carefully trimmed off. Too much inside or not enough? Sorry to say this, but you will need to start over.
Wow. Take a deep breath. Okay. the hard parts are over, and Im glad because Im getting tired of typing.
Set the cleaned/reassembled tube, into the (wash it first) pyrex dish. Grab your adapter and install in onto your syringe. Dip in your filtered fluid and draw up as much as practical. Insert bic pen of adapter as tight as possible over fill hole ans slowly release the fluid into the tube. If you are holding things properly and both fill holes are open you will spill little to no fluid. Have at it until all filtered fluid is in the tube. You will likely find you have about 1/8" or so of less fluid in the tube then when you started because of what the filter absorbed. Some use distilled water, some glycol, but nonetheless top the tube off with whatever you are comfortable with until you have a small bubble about 1 inch wide remaining. Clean the two screws and put back into the fill holes. Dont forget the gasket. If you lost the gasket or it broke, tighten the screws a few turns, then apply a drop of RTV silicone to the underside of the screw head. Tighten "finger tight" and allow to dry. Now tilt the tube various direction to make sure there are no leaks.
IMPORTANT- DONT SHAKE THE TUBE to try to get the micro-bubbles out! You might destroy the tube. the micro bubbles will work out on their own over a few days time once the tube is back in the PJ.
Re-install the tube into the PJ. Needless to say you probably need to do a full physical setup, calibration, registration, etc...
Smile- You only have two more tubes to go! :-)
Enjoy! Hope this helps someone. Maybe Ill take pics of the next one I do.
--Kieth