Ken & Kristine -
First, Keystone produces a generic owner's manual that covers all of its RV models. The manuals are revised and updated every so often but there is no manual that is specific for your Laredo.
There may be an owner's manual if you go to the Keystone website (
www.keystonerv.com) and look for the Owner's Manual download link. I haven't gone there recently and am not sure how far back the downloads are available.
Secondly, there are no schematics for anything - plumbing, wiring, etc., - Keystone does not make them available despite repeated requests from owners.
I can't give you specific directions about the location of the converter in that model -- perhaps someone who has a 2007 Laredo will be able to tell you where it is located.
Lastly, --- welcome to the forum!!