Oki ML490 Maintenance Manual
Also see for ML490 Series: User guideInstallationInstallationUser guideSafety & warranty
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Contents
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42114101 Rev.1 5 /3.3.20 Rear Tractor Assy ................................................................................................. 773.3.21 Rear Pressure Assy .............................................................................................. 783.3.22 Switch Lever ......................................................................................................... 794. ADJUSTMENT ...................................................................................................805. CLEANING AND LUBRICATION .......................................................................885.1 Cleaning ............................................................................................................................. 885.2 Lubrication ......................................................................................................................... 896. TROUBLESHOOTING AND REPAIR ................................................................976.1 Items to Check Before Repair ............................................................................................ 976.2 Troubleshooting Table ....................................................................................................... 976.3 Lamp Display ..................................................................................................................... 986.4 Connection Circuit Check for Printhead and SP/LF Motor............................................... 1026.5 Troubleshooting flow chart ............................................................................................... 104APPENDIX A PCB LAYOUT ...............................................................................116APPENDIX B SPARE PARTS LIST ....................................................................117APPENDIX C RS-232C SERIAL INTERFACE BOARD (OPTION) ....................1281. GENERAL ............................................................................................................................ 1282. OPERATION DESCRIPTION .............................................................................................. 1282.1 Element Description .................................................................................................. 1282.2 Circuit Description ..................................................................................................... 1292.2.1 Operation at power on .................................................................................... 1292.2.2. RS-232C interface .......................................................................................... 1292.3 Communication Procedure Flowchart ....................................................................... 1302.3.1 Mode a .......................................................................................................... 1302.3.2 Mode b .......................................................................................................... 1313. TROUBLESHOOTING FLOWCHART ................................................................................. 1323.1 Before Repairing a Fault ............................................................................................ 1323.2 Troubleshooting ......................................................................................................... 1323.3 Local Test .................................................................................................................. 1353.3.1 Circuit test mode ............................................................................................ 135 |
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