Brother Facsimile Equipment MFC7420 - Manual (Page 188)

Confidential
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.
CONTENTS
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...................................................................................... 9-11
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