@FuchsDanin

2 months ago

I spent most of my life servicing CRTs, CRT projectors, and other consumer electronics. I know what's causing the cloudy display here, and it will improve overall intensity as well as dramatically improve clarity -- it's algae growing in your coolant. It causes localized groups of cloudiness, an overall dingy washed out image, and if you look into the CRT and move around you can see a parallax effect because it's between your eyes and the surface of the CRT. Most CRT projectors had a coolant reservoir sealed against the face of the tube, to reduce heat and allow them to crank up light intensity without suffering burn-in as quickly. This coolant is not circulated, and MANY MANY MANY models suffered growth in the chamber. It was believed to be contamination in the production and assembly process. The repair process is theoretically simple but can be complicated because of how packed together that model is -- on every single model, there is a rubber boot with a cap holding it down, to allow thermal expansion. Orient the boot upward, remove the cap, empty and flush the chamber with 99% isopropyl, and replace it with CRT coolant. Remove ALL AIR from the system (NO bubbles, POUR SLOW) and reassemble with the boot pushed in a little, to allow for expansion as mentioned. MG Chemicals still sells the stuff, on Amazon. The "water cooling" parts you highlighted were actually the very thoroughly wrapped and potted HV components for the CRT. I would sincerely love to provide my knowledge to help you guys out!

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