There's a downloadable version of the manual for the 1703 here:
http://www.sewconsult.com/kenmore/15..._158_1703.html
I have the 1803 manual which I would be glad to email to you, but it's a large file. The 1703 and 1803 were very similar machines - some of the information in this manual won't pertain to the 1703, but all the info about stitch settings, cams, threading, bobbins, needles, etc. should be the same.