A line printer of the type using a 384-character type carrier receives a 240-character type data array from a computer designed for a 240-character line printer and converts the 240-character array into a 384-character data array with no partial character sets. The converted 384-character data array corresponds exactly to the characters on the type carrier. The type carrier includes a number of dummy characters in each character set if the type carrier employs other than 48-character sets.