Maintenance requirements are reduced by using only a subset of the functions of a media processing device having plural function units for processing processed media. When a control unit of the media processing device receives a command from a host computer to disable a function of an inkjet printer unit disposed to a conveyance path for the processed media or to disable a function of a contact image sensor unit disposed to the conveyance path, a function-disabled mode is entered that disables the specified function. While in the function-disabled mode, detected operating errors related to the disabled function are not reported to the host computer.