Oki ML420 Maintenance Manual
Also see for ML420 Series: Specification sheetUser guideUser guideInstallationInstallation
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Contents
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42113901TH01 Rev.3 5 /Oki Data CONFIDENTIAL3.3.20 Rear Tractor Assy ................................................................................................. 763.3.21 Rear Pressure Assy .............................................................................................. 773.3.22 Switch Lever ......................................................................................................... 784. ADJUSTMENT ...................................................................................................795. CLEANING AND LUBRICATION .......................................................................875.1 Cleaning ............................................................................................................................. 875.2 Lubrication ......................................................................................................................... 886. TROUBLESHOOTING AND REPAIR ................................................................956.1 Items to Check Before Repair ............................................................................................ 956.2 Troubleshooting Table ....................................................................................................... 956.3 Lamp Display ..................................................................................................................... 966.4 Connection Circuit Check for Printhead and SP/LF Motor ............................................... 1006.5 Troubleshooting flow chart ............................................................................................... 102APPENDIX A PCB LAYOUT ...............................................................................114APPENDIX B SPARE PARTS LIST ....................................................................115APPENDIX C RS-232C SERIAL INTERFACE BOARD (OPTION) ....................1261. GENERAL ............................................................................................................................ 1262. OPERATION DESCRIPTION .............................................................................................. 1262.1 Element Description .................................................................................................. 1262.2 Circuit Description ..................................................................................................... 1272.2.1 Operation at power on .................................................................................... 1272.2.2. RS-232C interface .......................................................................................... 1272.3 Communication Procedure Flowchart ....................................................................... 1282.3.1 Mode a .......................................................................................................... 1282.3.2 Mode b .......................................................................................................... 1293. TROUBLESHOOTING FLOWCHART ................................................................................. 1303.1 Before Repairing a Fault ............................................................................................ 1303.2 Troubleshooting ......................................................................................................... 1303.3 Local Test .................................................................................................................. 1333.3.1 Circuit test mode ............................................................................................ 133 |
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