Quoting from the link above:
Ricoh Error Code 495, SC495 Fix - Printer, Copier, Fax Machine
October 02, 2012, 11:18:43 pm »
The Ricoh copier error code 495 / SC495 is a toner recycling unit error code.
If you receive this error you will want to check:
Your Waste toner transport is nor working ( motor overload )
Check Toner end sensor detective, (is not connected )
If the problem persists you may need to contact a local service technician to take a look at your copier.
Contact us by phone, email, or reply to this post with any questions you may have, we can always help.