4. ADJUSTMENT ............................................................................….. 4 - 14.1 Adjustment Types and Functions ..........................…….....…..... 4 - 14.1.1 Printer Driver ………………………………………………………………… 4 - 14.1.2 Engine Maintenance Utility ……………………………….……… 4 - 24.2 Adjustment When Replacing a Part ……………………………… 4 - 24.2.1 Setting LED Head Drive Time ………………………………………… 4 - 24.2.2 Uploading and Downloading EEPROM Data ……………… 4 - 35. PERIODICAL MAINTENANCE ……………………………………… 5 - 15.1 Periodical Replacement Parts .................................................. 5 - 15.2 Cleaning .................................................................................... 5 - 25.2.1 Cleaning the LED Lens Array .................................................….. 5 - 26. TROUBLESHOOTING PROCEDURES ......................................… 6 - 16.1 Troubleshooting Tips ...........................................................… 6 - 16.2 Check Points Before Correcting Image Problems ................… 6 - 16.3 Notes When Correcting Image Problems ..............................… 6 - 16.4 Preparation Before Troubleshooting ......................................… 6 - 16.5 Troubleshooting .....................................................................… 6 - 26.5.1 Status Monitor Message List ...................................…………….……… 6 - 36.5.2 Status Message Troubleshooting ................................…….….. 6 - 66.5.3 Image Troubleshooting ................................................…….….. 6 - 127. WIRING DIAGRAM ......................................................................... 7 - 17.1 (b)Interconnect Signal Diagram (OKIPAGE 6w) ...................… 7 -17.2 PCB Layout ...........................................................................… 7 -27.2.1 a) Main Control Board (HBY PCB) (OKIPAGE 6w EPROM type) .…… 7 -27.2.2 High-Voltage Power Supply Board ........................................... 7 -38. PARTS LIST .................................................................................... 8 -1APPENDIX A LOCAL PRINTING/ DEMO PAGE PRINTING ............. A - 1APPENDIX B PARALLEL INTERFACE ............................................. B - 1APPENDIX C MAINTENANCE UTILITY GUI MANUAL (OKIPAGE 6W) C - 1