Question about Projection Televisions
Double check all the voltages on the boards and compare. you might have a bad resistor or cap on the board causing this.
If everything above looks fine then your problem sounds like there is contaminated coolant inside the picture tubes and will have to be replaced in all three tubes. Not really a hard job to do as I will post a complete how to do this job. The best way to tell is to turn on the TV set and look down inside each lens. You will see things floating around inside the tube or see a haze on the picture tubes surface. See below for the instructions. Good LuckChanging 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 **** 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.
Posted on Apr 16, 2008
Ok, if it was the spiltter it would be dead, or picture would be doing something differant.
at this point i would check for solder cracks on all convergance ic's as they are big and mounted on heat syncs. also checking vertical ic for cracks and all yoke plugs and connectors. also i don't see a model number so i can't go much more on it, besides, askin you if you try to converge it, do the red and blue move? if not then you def got a prob with convergance ic's. solder them first if doesbt fix, check resisters and fuses incuding all solder in pico fuses. and replace the ic's
Posted on Apr 16, 2008
Try to check the connection at the back of TV if they are properly plug in, make sure cables are tightly connected. Loose cabling is one reason to produce those shadows and outline. Try to give TV a little dodge but be careful not to knock it off from its place. Hope that helps.
Posted on Apr 15, 2008
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