GR 1700 Master Misfeed

[sng4prt]

I am not a technician, but machine problem "fixer" most of the time. Our Riso GR1700 is way out of warranty and the school will no longer call a real repairperson. The error code is C26, but I have been everywhere I can find to look for a master misfeed. How can I access the entrance into the master disposal? Is there a schematic to show just what will move and can be removed? I'm ready to use a hammer.
Thanks.

[manuals4you]

Are you sure this isn't a Riso Duplicator?

http://www.justmanuals.com/riso-series-service-manual-p-43290.html