Chapter 9 Error Indication And Troubleshooting - Brother MFC-9420CN Service Manual

CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING

This chapter details error messages and codes that the incorporated self-diagnostic
functions display if any error or malfunction occurs. If any error message appears, refer
to this chapter to find which components should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main
sections of the machine and related troubleshooting procedures. This will help service
personnel pinpoint and repair defective components.
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 "MACHINE ERROR X X" messages ........................ 9-5
9.1.2 Communications Errors ..................................................................................... 9-15
9.2 TROUBLESHOOTING .................................................................................................. 9-19
9.2.1 Introduction ........................................................................................................ 9-19
9.2.2 Precautions ........................................................................................................ 9-19
9.2.3 Checking Prior to Troubleshooting .................................................................... 9-19
9.2.4 Troubleshooting Based on Problem Type ......................................................... 9-20
[ 1 ] Software setting problems ......................................................................... 9-20
[ 2 ] Image failure .............................................................................................. 9-23
[ 3 ] Paper transport error ................................................................................. 9-50
[ 4 ] Incorrect printout........................................................................................ 9-52
[ 5 ] Network problem ....................................................................................... 9-54
[ 6 ] Troubleshooting of the control panel ......................................................... 9-58
[ 7 ] Troubleshooting of fax functions ............................................................... 9-60
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