6 Microline 420/421 User’s GuideChapter 4: Menu Mode ............................................ 25Menu Mode Keys ....................................................................... 25Entering and Exiting Menu Mode ............................................. 26Resetting the Menu to the Factory Defaults .............................. 26Printing the Menu Settings ......................................................... 26Changing the Menu Settings ...................................................... 27Menu Settings Table ................................................................... 28Explanations of Menu Items ...................................................... 35Chapter 5: Maintenance........................................... 42Replacing the Ribbon Cartridge ................................................... 42Loading Paper ............................................................................... 44Rear Feed ................................................................................... 44Top Feed (Single Sheets) ........................................................... 53Clearing Paper Jams ..................................................................... 55Rear-Feed Paper Jams ................................................................ 55Rear-Feed, Repeating Paper Jams .............................................. 56Single-Sheet Paper Jams ............................................................ 58Cleaning the Housing ................................................................... 59Chapter 6: Troubleshooting ..................................... 60General Information ..................................................................... 60Problems / Solutions ..................................................................... 61Appendix A: Parts & Accessories ............................ 66Purchasing Parts & Accessories ................................................... 66Replacement Parts ........................................................................ 67Accessories ................................................................................... 68Appendix B: Printer Control Codes ....................... 69IBM Proprinter III Commands ..................................................... 69Epson FX Commands ................................................................... 72Oki MICROLINE Standard Commands ...................................... 75Appendix C: Specifications ...................................... 78Appendix D: Installation .......................................... 84Location ........................................................................................ 84Unpack .......................................................................................... 84Install the Ribbon Cartridge ....................................................... 87Power Connection ........................................................................ 88Computer Connections ................................................................. 88Parallel (LPT): IEEE 1284 ......................................................... 88USB: Specification 1.1 Compliant ............................................. 89Loading Paper ............................................................................... 89Testing the Printer ......................................................................... 90Font Sample Test ........................................................................ 90Rolling ASCII Test ..................................................................... 91Hexadecimal Dump Mode ......................................................... 92Emulations .................................................................................... 92Printer Drivers .............................................................................. 92Loading the OKI Driver ............................................................. 93Using a Compatible Driver ........................................................ 93Index .......................................................................... 94