DMP 302 (26-2849) Self Test Faxback Doc. # 4171 The printer has a built-in self test feature to check the print quality and general printer operation. Before running the self test, be sure to load the printer with 8 1/2" by 11" paper since the test prints from one end of the platen to the other. CAUTION: Printing on the platen can shorten the life of the platen and the print head. To run the self test: Press and hold [LINE/FORM], and turn on the printer. The printer prints the ASCII 95 characters in various fonts programmed into the printer. To stop the self test, press [ON/OFF LINE]. The self test printout also provides information about your printer. Have this information handy if you call for service.