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MFC7420
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CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING
9.1 ERROR
INDICATION ................................................................................................ 9-1
9.1.1 Equipment
Errors ................................................................................................. 9-1
[ 1 ] Error messages appearing on the LCD ....................................................... 9-1
[ 2 ] Error codes shown in the "MACHINE ERROR X X" messages................... 9-5
9.1.2 Communications
Errors...................................................................................... 9-11
9.2 TROUBLESHOOTING ............................................................................................ 9-15
9.2.1 Introduction......................................................................................................... 9-15
9.2.2 Precautions ........................................................................................................ 9-15
9.2.3 Checking Prior to Troubleshooting ..................................................................... 9-15
9.2.4 Troubleshooting Based on Problem Type .......................................................... 9-16
[ 1 ] Paper feeding problems ............................................................................. 9-16
[ 2 ] Software setting problems ......................................................................... 9-18
[ 3 ] Malfunction................................................................................................. 9-21
[ 4 ] Image defects ............................................................................................ 9-27
[ 5 ] Incorrect printout ........................................................................................ 9-48
[ 6 ] Network problem ........................................................................................ 9-50
[ 7 ] Troubleshooting of the control panel.......................................................... 9-54
[ 8 ] Troubleshooting of fax functions ................................................................ 9-56
APPENDIX 1 SERIAL NUMBERING SYSTEM
APPENDIX 2 FIRMWARE INSTALLATION
A2.1 INSTALLING THE UPDATE DATA TO THE MACHINE.................................. App. 2-1
A2.2 SETTING ID CODES TO MACHINES.............................................................. App. 2-9
APPENDIX 3 CUSTOMIZING CODES ACCORDING TO SHIPPING DESTINATION
APPENDIX 4 FIRMWARE SWITCHES (WSW)
APPENDIX 5 WIRING DIAGRAM
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