[cctalk] Re: Planar ELT320 Schematics?

Yeah – I don’t know much about the ELT320 technology, but if it’s really an electroluminescent panel then it needs somewhere around 100V of AC to light up the pixels. There’s a section on the lower left of the PCB that’s clearly some kind of switching power supply; my guess is that’s a good place to start. But a schematic would be really (really!) handy. Bob From: Glen Slick [mailto:glen.slick@gmail.com] Sent: Sunday, June 14, 2026 3:55 PM To: bob(a)jfcl.com; General Discussion: On-Topic and Off-Topic Posts Subject: Re: [cctalk] Planar ELT320 Schematics? On Sun, Jun 14, 2026, 3:34 PM Robert Armstrong via cctalk <cctalk(a)classiccmp.org> wrote: Darn - my beloved Planar ELT320 terminal has died. I was just sitting there using it and suddenly the screen went blank. The keyboard still works and the power LED lights, so not a simply power supply failure. Does anybody have a schematic or service manual for these guys? It's one of my favorite terminals - not only does it have a beautiful orange/amber EL display, but it's also way smaller and lighter than any VTxxx terminal of the era. Thanks Bob I also have an ELT320 that failed with a completely dead screen quite a while ago. I haven't done anything to troubleshoot it yet. My wild guess without anything to back it up is that maybe a high voltage inverter board for driving the display died. Maybe I'm lucky and it's just bad capacitors. I need to open it up again and take another look.