As noted, in another reply, the DEC VT-5xx terminal series was mfg. by ADDS. Boundless Technologies (former ADDS) shutdown sales a few years ago. They will service & supply parts, as long as inventory of proprietary parts exists. http://www.boundlessterminals.com/ Boundless Technologies 1916 State Route 96 Phelps, NY 14532 www.boundlessterminals.com Phone (toll-free): 1-800-231-5445 Phone: 1-315-548-6189 Fax: 1-315-548-5100 CONTACT PAGE: http://www.boundlessterminals.com/support.html We will continue to service and repair Boundless products at our Z-AXIS facility (Rochester, NY area) until spare parts are no longer available. While Boundless expects to maintain their website, in the near future, they HIGHLY recommend that you download ANY Manuals you might need in the future. http://www.boundlessterminals.com/documentation.html greg == Date: Sat, 25 Jul 2020 14:36:06 -0400 From: Paul Koning <paulkoning at comcast.net> To: "cctalk at classiccmp.org" <cctalk at classiccmp.org> Subject: Broken VT510 I recently brought home a VT510 that has been sitting in my office, rescued from a lab from way back when it was a DEC office (ZKO). Unfortunately, when I plug it in and push the power switch, nothing happens. Rather than just open it up and poke, I was hoping others here might have some experience with that model. Are the schematics anywhere? Not on Bitsavers as far as I can see. Are other terminals at all similar? The newest schematic I see is for the VT340. It would be nice to get the terminal working again. Alternatively, a wild idea would be to use the CRT in place of the "screen fungus" infested VR201 CRT I would like to repair. Any chance of that working? paul