On Wednesday, July 15, 2015 at 9:44:24 AM UTC-4, Whiskey Charlie wrote:
Hello,

Recently acquired an LX 4000 flight computer and variometer.

We only have an operating manual.

Where can I find an installation manual or schematic?

Thanks!

From their (LX) site (in German)... http://www.lxnavigation.com/manuals/
Another site.... http://www.bas.uk.net/manuals.html

Wing & Wheels may have them as may Cumulus Soaring.