Fixya
https://www.fixya.com > ... > Sony
Sep 13, 2018 - To unlock the main panel keys, press the MENU button for 10 seconds. Read full answer. Aug 05, 2011 • Sony VPL-CS7 Multimedia Projector.
pro.sony
https://pro.sony > ue_US > pdf > vpl-dx220
PDF
Efficient, easy-to-use projector for classrooms and meeting rooms: with excellent picture quality and low ownership costs. The VPL-DX220 XGA projector is a ...