Description: • Fuse error of monochrome drum cartridge.
The First use sensor problem. Especially "CALL SERVICE 17" is appeared when the fuse which is installed in the Drum Unit PCB is not blown out within a specific time.
win 7 is no longer supported by Microsoft so their drivers develop bugs
go the the Panasonic web site , find your model printer and the download compatible with win 7 and download and run from there
Press Menu first, then #9000*, next press 550, press Start, wait for printing, unplug the electric cord, wait 10 seconds or more, plug it again - sorted.