Is there a forum or other help available for doing trouble shooting
and/or minor repairs on Xerox digital copiers? Our business is a
non-profit and cannot afford a service contract, the service calls are
also sky high ($250 + $125 ea 15 min. + travel time) We repair our own
computers and have people with technological know how who could handle
this if we had some knowledge.

How does this look to you?
As there was little information in your question as to what type of
printer(s) you are looking solutions for it may be a useless link.

http://www.fixyourownprinter.com

Can you give a model number and description of the issue?