Brother MFC5490CN Service Manual page 89

CHAPTER 4 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.
4.1 ERROR INDICATION ............................................................................................. 4-1
4.1.1 Equipment Errors ...................................................................................... 4-1
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4.1.2 Communications Errors............................................................................. 4-24
4.2 TROUBLESHOOTING ........................................................................................... 4-31
4.2.1 Introduction................................................................................................ 4-31
4.2.2 Precautions ............................................................................................... 4-31
4.2.3 Checking Prior to Troubleshooting ............................................................ 4-31
4.2.4 Troubleshooting Based on Problem Type ................................................. 4-33
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4.2.5 Problems Encountered Frequently in the Past.......................................... 4-42
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4.2.6 Possible Component Defects and Resulting Problems............................. 4-45
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CONTENTS
Error messages appearing on the LCD............................................. 4-2
Error codes contained in "MACHINE ERROR X X" messages ......... 4-7
Control panel and LCD problems ...................................................... 4-33
FAX problems.................................................................................... 4-33
Communications problems................................................................ 4-33
Paper/document feeding problems ................................................... 4-34
Print-image problems ........................................................................ 4-35
PC-driven printing problems.............................................................. 4-40
Printing from memory cards--Compact Flash, Memory Stick,
SD Memory Card, xD-Picture Card and USB flash memory drive .... 4-41
Others ............................................................................................... 4-41
Paper jams ........................................................................................ 4-42
"MACHINE ERROR 4F" error message............................................ 4-43
Ink-related problems ......................................................................... 4-43
Auto document feeder (ADF) malfunction ......................................... 4-44
ADF mechanism................................................................................ 4-45
Scanner mechanism ......................................................................... 4-46
Head/carriage unit drive and purge mechanisms.............................. 4-47
Confidential