Oki ML420 Replacement Parts

Accessories 67

Replacement Parts Item Part Number

Both Models

Ribbon Cartridge ( )------------------------------- 42377801

Platen Knob ( )------------------------------------- 51902220

Power Cord ( ) ------------------------------------- 56631801

Printhead ( ) ---------------------------------------- 41923901

Model ML420

Access Cover ( ) ----------------------------------- 42115401

Sheet Guide ( )------------------------------------- 51009509

Pull-Up Roller Assembly ( ) --------------------- 42044701

Model ML421

Access Cover ( ) ----------------------------------- 42115301

Sheet Guide ( )------------------------------------- 51009410

Pull-Up Roller Assembly ( ) --------------------- 42045701

Contents

Main Page Safety Page Contents Chapter 2: Helpful Hints ...........................................8 Chapter 3: Using Your Printer................................ 10 Chapter 4: Menu Mode............................................ 25 Chapter 5: Maintenance........................................... 42 Index .......................................................................... 94 Chapter 6: Troubleshooting..................................... 60 Appendix A: Parts & Accessories ............................ 66 Chapter 1: Introduction Oki Data on the Internet Printer Features Chapter 2: Helpful Hints Saving Time Internet Support Paper Park Saving Money: Forms Tear-Off Operation Tips Top of Form (TOF) Turning the Platen Knob Controlling Access to the Printer Chapter 3: Using Your Printer Page Top of Form (TOF) Top of Form (TOF) and Forms Tear-Off Determining if Forms Tear-Off is Off or On Setting Top of Form (TOF): Forms Tear-Off OFF (Default Setting) Setting Top of Form (TOF): Forms Tear-Off Set to ON Temporarily Changing the Top of Form Position Resetting Top of Form to the Factory Default Forms Tear-Off Feature Potential Problems with Software Packages Changing the Forms Tear-Off Setting Manual Forms Tear Off Paper Park Changing Paper Paths Continuous Forms to Single Sheets Single Sheets to Continuous Forms Printhead Gap Print Quality Epson and IBM Emulations MICROLINE Emulation Character Pitch Printer Reset Emulations Changing Emulations Chapter 4: Menu Mode Menu Mode Keys Entering and Exiting Menu Mode Resetting the Menu to the Factory Defaults Printing the Menu Settings Changing the Menu Settings Menu Settings Table Page Page Page Page Page Page Explanations of Menu Items Page Page Page Page Page Page Chapter 5: Maintenance Replacing the Ribbon Cartridge Page Loading Paper Rear Feed Page Page Page Page Page Page Page Page Top Feed (Single Sheets) Page Clearing Paper Jams Rear-Feed Paper Jams Rear-Feed, Repeating Paper Jams Page Single-Sheet Paper Jams Cleaning the Housing Chapter 6: Troubleshooting General Information Problems / Solutions Page Page Page Page Appendix A: Parts & Accessories Purchasing Parts & Accessories Replacement Parts Accessories Appendix B: Printer Control Codes Page (continued) Epson FX Commands Page Epson FX Commands (continued) Commands Page Commands (continued) Appendix C: Specifications Emulations (co-resident) Print Speed Characters per Line (cpl) Graphics Resolution Resident Fonts Bar Codes Paper Thickness: Tractor Feed Paper Specifications: ML420 Paper Specifications: ML421 Environmental Requirements Electrical Requirements Physical Specifications Appendix D: Installation Location Unpack Page Page Install the Ribbon Cartridge Power Connection Computer Connections Parallel (LPT): IEEE 1284 USB: Specification 1.1 Compliant Loading Paper Testing the Printer Font Sample Test Rolling ASCII Test Hexadecimal Dump Mode Emulations Printer Drivers Loading the OKI Driver Using a Compatible Driver Index A B C E F G H I L O P R S T U W Z