I found an on-line, PDF copy of the Epson 1400 repair manual at http://www.resetters.ru/download/SM/P1410_B.pdf.
You might want to pull a copy of this and keep it on file if you have a 1400. It has all the error codes as well as instructions for a complete tear down should you want to do something like clean or replace your ink pads.
5/15/2012 - This link no longer works. Contact me if you need a copy. I can email it to you.