Broken VT510

Gregory Beat w9gb at
Sun Jul 26 12:40:34 CDT 2020

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.

Boundless Technologies
1916 State Route 96
Phelps, NY 14532
Phone (toll-free): 1-800-231-5445

Phone: 1-315-548-6189
Fax: 1-315-548-5100

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.

Date: Sat, 25 Jul 2020 14:36:06 -0400
From: Paul Koning <paulkoning at>
To: "cctalk at" <cctalk at>
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?


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