On Mon, Nov 19, 2018 at 11:41 AM Alan Perry via cctech < cct...@classiccmp.org> wrote:
> > I recently picked up a Rainbow 100. The PVA between the safety glass and > the CRT on VR201 that came with it has broken down and failed badly. > > I have seen videos and read about removing the safety glass, cleaning out > the PVA, and reattaching and resealing the safety glass. > > All that I have seen basically sticks the safety glass on at its edges and > leaves a void where the PVA had been. It seems to me that the PVA was > providing some implosion protection. Would it work to replace the PVA and > attach the safety glass to the tube with an optically clear adhesive sheet? > I have seen that this exists, but have never used it before. > > Also, I have never worked on a CRT before. I am trying to find a local > person who can observe me and stop me from doing something stupid. If I > can’t find someone, what am I more likely to do wrong? How can I be sure I > discharged it before touching it? > I have a VR201 that's like this myself, and I've been too scared to try to fix it. Instead, I've tried bodging together various hacks to try to get the signal into a modern composite to VGA converter... Finally, a VR201 specific question. I booted the Rainbow over the weekend > and, looking through broken-down PVA, I could see the Rainbow has booted > and I could enter DOS commands. I could also see white retrace lines. What > is the likely cause of that on a 35-year-old CRT? > Pics? Warner