Bleeding CRT Tubes

A big thank you goes out to forum member Kai (kschmit2) for providing these instructions and videos in this section!

A situation can arise in air-coupled CRT projector tubes where coolant glycol needs to be bled out in order to relieve pressure that may have built up over time (under certain conditions). This section covers how to check if this needs to be done to your projector, and instructions with videos for doing the actual bleeding.

Failure to relieve this pressure may eventually lead to the following:

(Thanks to forum member “Willie“ for providing the photo.  Sorry about the tube!)

Note: The topics in this section are considered advanced as it may require you to remove the tube(s) from the projector in order to check and fix the tubes.