Oki ML420 Chapter 4: Menu Mode............................................ 25, Chapter 5: Maintenance........................................... 42, Index .......................................................................... 94, Chapter 6: Troubleshooting..................................... 60, Appendix A: Parts & Accessories ............................ 66, Appendix B: Printer Control Codes ....................... 69

6Microline 420/421 User’s Guide
Chapter 4: Menu Mode............................................ 25
Menu Mode Keys....................................................................... 25
Entering and Exiting Menu Mode ............................................. 26
Resetting the Menu to the Factory Defaults .............................. 26
Printing the Menu Settings......................................................... 26
Changing the Menu Settings...................................................... 27
Menu Settings Table................................................................... 28
Explanations of Menu Items ......................................................35
Chapter 5: Maintenance........................................... 42
Replacing the Ribbon Cartridge................................................... 42
Loading Paper............................................................................... 44
Rear Feed ................................................................................... 44
Top Feed (Single Sheets) ...........................................................53
Clearing Paper Jams .....................................................................55
Rear-Feed Paper Jams................................................................ 55
Rear-Feed, Repeating Paper Jams.............................................. 56
Single-Sheet Paper Jams ............................................................58
Cleaning the Housing ................................................................... 59
Chapter 6: Troubleshooting..................................... 60
General Information .....................................................................6 0
Problems /Solutions ..................................................................... 61
Appendix A: Parts & Accessories ............................ 66
Purchasing Parts & Accessories ...................................................6 6
Replacement Parts ........................................................................67
Accessories................................................................................... 68
Appendix B: Printer Control Codes ....................... 69
IBM Proprinter III Commands..................................................... 69
Epson FX Commands................................................................... 72
Oki MICROLINE Standard Commands ...................................... 7 5
Appendix C: Specifications...................................... 78
Appendix D: Installation.......................................... 84
Location........................................................................................ 84
Unpack.......................................................................................... 84
Install the Ribbon Cartridge....................................................... 87
Power Connection ........................................................................ 88
Computer Connections................................................................. 88
Parallel (LPT): IEEE 1284......................................................... 88
USB: Specification 1.1 Compliant............................................. 89
Loading Paper............................................................................... 89
Testing the Printer......................................................................... 90
Font Sample Test........................................................................ 90
Rolling ASCII Test..................................................................... 91
Hexadecimal Dump Mode ......................................................... 92
Emulations.................................................................................... 92
Printer Drivers ..............................................................................9 2
Loading the OKI Driver............................................................. 93
Using a Compatible Driver ........................................................93
Index .......................................................................... 94