Strange Spots on Trinitron CRT

[andy]

...

[RobtWB]

odd to see on a Sony set
I have a 67 Zenith rectangle crt that has the same looking "mold" spots as I see on your Sony set - always assumed aging of the pva between safety glass and crt face

[wa2ise]

Older American color CRTs the faceplate is stuck on with a silicon like glue. And can be removed by various techniques, search this forum for "cataract". Though none were like Sony's.

If you remove the CRT from the cabinet, don't take the yoke and other stuff attached to the neck area off the CRT, as that will require you do a convergence over again, and that is a PITA.

Be sure to wear eye protection, as CRTs can be dangerous if they implode. A full face shield would be better. And long sleeves and full length pants too, idea is to keep flying bits of glass out of the skin and eyes.

[jhalphen]

Good day to all,

Thank you! gentlemen for your replies. I've learned something: that Sony also used a plexiglas protection faceplate on some of its tubes - never suspected that.

TV belongs to a friend so i won't be attempting removal.

Best Regards

jhalphen
Paris/France

[ChrisW6ATV]

Originally Posted by andy

It's a cataract. Sony used bonded safety glass on some CRTs until the early 80's.

Yes, I have seen Sony CRTs with faceplates, too, but none (until now) with a "cataract".