41316401TH Rev.9 6 /Oki Data CONFIDENTIAL5.4 Preparation for Troubleshooting .................................................................................... 945.5 Troubleshooting ............................................................................................................. 945.5.1 LCD messages list ............................................................................................ 955.5.2 Preparation for troubleshooting ...................................................................... 1005.5.3 Troubleshooting image problems ................................................................... 1116. CONNECTION DIAGRAM ............................................................................ 1256.1 Resistance Checks ...................................................................................................... 1256.2 Program/Font ROM Layouts ........................................................................................ 1297. Parts List ...................................................................................................... 133APPENDIX A CENTRONICS PARALLEL INTERFACE................................... 149APPENDIX B 2ND/3RD TRAY MAINTENANCE .............................................. 1531. Parts Replacement ...................................................................................................... 1531.1 Cover Idle Roller Assy .................................................................................... 1531.2 PCB ................................................................................................................ 1541.3 Feeder Drive Assy .......................................................................................... 1552. C7400/C7200 2nd/3rd Tray PARTS LIST .................................................................... 156
