2009 Ford F250 Owner's Manual - Page 79

Entertainment Systems Cleaning DVD and CD discs Inspect all discs for contamination before playing. If necessary, clean discs only with an approved DVD and CD cleaner and wipe from the center out to the edge. Do not use circular motion. Compatibility with aftermarket audio systems (headphone only mode) When the Family Entertainment System (FES) detects that the original radio supplied by Ford Motor Company has been removed from the vehicle, the FES will work in a state referred to as "Headphone Only Mode." This mode allows the FES to operate as a standalone system, without interface to the radio. While operating in Headphone Only Mode, the system will have limited functionality. • The system will only output audio to the headphones. It will not be capable of providing audio to the speakers. • The available sources in FES Headphone Only Mode are DVD-DISC and DVD-AUX, regardless of headphone channel (A or B). • When a disc is inserted into the FES while in Headphone Only Mode, both headphone channels (A and B) will be connected to FES-DISC. NAVIGATION SYSTEM (IF EQUIPPED) Your vehicle may be equipped with a navigation system. Refer to the Navigation system supplement for further information. SYNC (IF EQUIPPED) Your vehicle may be equipped with SYNC , a hands-free communications and entertainment system with special phone and media features. For more information, please refer to the SYNC supplement or to the SYNC section in the Navigation system supplement (if equipped). 79 2009 F-250/350/450/550 (f23) Owners Guide, 3rd Printing USA (fus)