I have adjusted the color on this set to death and cannot get it to correct. It has a hazy apprearance and is somewhat dark. Flesh is horrible on some stations and better on others. I have cleaned the lenses and the mirror. Is there a way to reset the system to wipe out the hundreds of corrections I have made and start all over? I have went to the convergence and tried to reset to factory settings, but it does not help.
Your TV should be about 6 to 7 years old Im seeing in this manual. This set is common for the coolent fluid inside the CRT,s to get contaminated and cause all sorts of problems. Like hallos around objects, part of the picture being slightly off color, washed out colors and picture, ect. This is something you can do if your extremely carefull and very handi at doing things. If your not, contact a servicer in your area and get an estimate on the repair cost. The best way to see if it is the coolent, is to look directly into all three lens when the set is on and see if you see little things floating around inside the tubes and or it looks cloudy inside, like a fog or film is inside the lens. If you need the information to do this, I will post it here, but like I said, if you have very little handi man talent, do not attempt this yourself , as it could do alot of damage instead of good. Good Luck, and let us know how you made out. Here is the info by the way in case you need it.
Changing Projection TV Coolant
1. Tip the TV set so the expansion chambers are pointed up. The expansion chamber is a small white/clear plastic bulb-like thing
that is attached to one side of each of the CRT's up near the top lens. In some TVs, the expansion chambers are already pointed
up - In this case you don't have to tip the TV
2. Cover the circuit boards below the CRT's with several paper towels to prevent accidentally spilling any coolant onto the boards.
The coolant is corrosive and will destroy the circuit boards. Don't skimp on the paper towels here - they are cheap!!!
3. Remove the four screws that hold on the focusing lens assembly and remove the focusing lens assembly.
4. Note the position of the expansion chamber then remove the expansion chamber. It will need to be reinstalled in basically the
same position so remember the position or take a picture if you need to. There is a small o-ring on the neck of the expansion
chamber where it threads onto the CRT housing - Don't loose it!
5. Use the baster and tube to suck the fluid out from the hole where the expansion chamber was removed. This hole is fairly small...
maybe 5/16" or so.
6. Once most of the fluid is out, remove the four screws that hold on the lens cover plate.
7. Remove the lens cover plate, the lens & the large o-ring. (be gentle with the o-rings!!!)
8. Clean the CRT chamber & lens with denatured alcohol. Use 100% cotton balls so you don't scratch anything.
9. Clean the CRT chamber and lens with distilled water. Again, use 100% cotton balls so you don't scratch anything. This will rinse
out the alcohol residue. You need to use distilled water for this so there is no mineral residue.
10. Gently clean the large o-ring with distilled water (don't use the alcohol because it might eat the o-ring) Dry off the o-ring and
lightly coat it with 100% pure silicone (not siliconized acrylic caulking or acrylic latex caulking - ONLY USE 100% SILICONE).
Use your fingers to rub a thin layer of silicone all over the surface of the o-ring. Then place the o-ring in the groove in the CRT
housing.
11. Place the lens in its position on the o-ring.
12. Place the lens cover plate over the lens and install the four screws.
13. Clean your baster and tubing with denatured alcohol then rinse with distilled water.
14. Use the baster and tube to suck clean fluid from the bottle and install it into the CRT through the expansion chamber hole. Go
really slow when it is almost full to minimize overflow. Wipe up any overflow immediately. There will be a small air pocket in
the CRT when you are done - you will not be able to fill the chamber 100% - This is O.K. Just be sure to fill it as far as possible
so the fluid is just up to the edge of the expansion chamber hole.
15. Install the expansion chamber. Be sure to install it in the same position as it was before you removed it. Also be sure that the
small o-ring is on the neck of the chamber before you thread it on. The chamber is just plastic so don't over-tighten it or you
might damage it. Screw it on as tight as you can go by hand and then give it about 1/8 of a turn with pliers. (you might have to
use needle-nose pliers to get a good grip on it.)
16. Place the focusing lens assembly into position and install the four screws.
17. Turn on the TV and check for leaks over the next 20 minutes. Remember, you have not yet removed all the paper towels from
inside the TV. Remove these once you know there are no leaks.
Other things that should be done after replacing the fluid include...
1. Clean the mirror
2. Clean the top lenses of the focusing assemblies
3. Focus the CRT's
4. Adjust the convergence
Here is a list of things you will need:
1. Turkey baster
2. Vinyl tube
3. Cooling Fluid
4. 100% cotton balls
5. Paper towels
6. Denatured alcohol 91%
7. Distilled water
8. Pliers
9. Screw driver
Ordering Coolant:
www.mcminone.com Part # 20-4275
My TV used just a bit more than one bottle to change all three so I would suggest ordering two bottles.
Awesome! I am sure I can handle this. Thank you
Easier to do from the front or the back of the tv?
CRT coolant change and advanced convergence - how to
I documented the procedure I did on a Philips 55" rear projection 55p916
http://tinyurl.com/lmp6eu
CRT coolant change procedure
http://tinyurl.com/l7bd7r
basic and advanced convergence