vSection V AppendixesA Safety and LegalChoosing a location .............................................................................................86To use the machine safely...................................................................................87Important Information...........................................................................................90Standard telephone and FCC Notices........................................................... 90Industry Canada Compliance Statement (Canada only) ..............................93Disconnect device ......................................................................................... 93LAN connection ............................................................................................93Laser safety ................................................................................................... 93FDA regulations.............................................................................................93Important safety instructions..........................................................................94Trademarks ................................................................................................... 96B OptionsOptions ................................................................................................................97Optional Paper Tray (6429897) ...........................................................................98Memory Board .....................................................................................................98DIMM types ................................................................................................... 98Installing extra memory .................................................................................99C Troubleshooting and routine maintenanceTroubleshooting ................................................................................................. 100If you are having difficulty with your machine .............................................. 100Improving the print quality ........................................................................... 106Setting Dial Tone Detection......................................................................... 111Phone line interference................................................................................ 111Error messages ................................................................................................. 112Checking if the machine has faxes in its memory ....................................... 116Sending faxes to another fax machine ........................................................ 116Sending faxes to your PC............................................................................ 116Document jams............................................................................................ 117Paper jams .................................................................................................. 118Routine maintenance......................................................................................... 122Cleaning the outside of the machine ........................................................... 122Cleaning the scanner glass ......................................................................... 124Cleaning the laser scanner window............................................................. 124Cleaning the corona wire............................................................................. 126Cleaning the drum unit ................................................................................ 127Replacing the toner cartridge (485-5).......................................................... 128Replacing the toner cartridge ...................................................................... 128Replacing the drum unit (485-4) .................................................................. 131Replacing periodic maintenance parts............................................................... 133Packing and shipping the machine .................................................................... 133Machine Information .......................................................................................... 134Checking the serial number......................................................................... 134Checking the page counters........................................................................ 134Checking the remaining life of parts ............................................................ 135