Oki B4500 Maintenance Manual page 5

5. TROUBLESHOOTING PROCEDURES .................................................. 53
5.1 Troubleshooting Tips ....................................................................... 53
5.2 Points to Check before Correcting Image Problems........................ 53
5.3 Tips for Correcting Image Problems ................................................ 53
5.4 Preparation for Troubleshooting ...................................................... 54
5.5 Troubleshooting Flow ...................................................................... 54
5.5.1 LCD Status Message/Problem List.......................................................... 54
5.5.2 LCD Message Troubleshooting ............................................................... 61
5.5.3 Image Troubleshooting ............................................................................ 69
6. WIRING DIAGRAM ................................................................................. 78
6.1 Interconnect Signal Diagram ........................................................... 78
6.2 PCB Layout and Connector Signal List ........................................... 79
6.3 Resistance Check ............................................................................ 95
APPENDIX A RS-232C SERIAL INTERFACE (OPTION) .......................... 97
APPENDIX B CENTRONICS PARALLEL INTERFACE ........................... 102
APPENDIX C UNIVERSAL SERIAL BUS (USB)...................................... 111
APPENDIX D LOOP TEST (RS-232C INTERFACE) ................................ 117
APPENDIX E DIAGNOSTICS TEST ......................................................... 118
APPENDIX F MULTI PURPOSE FEEDER MAINTENANCE .................... 129
APPENDIX G HIGH CAPACITY SECOND PAPER FEEDER .................. 145
APPENDIX H NETWORK INTERFACE (OPTION) ................................... 163
43502101TH Rev.1
Oki Data CONFIDENTIAL
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