Brother MFC990CW Service Manual page 124

Inljet mfc/dcp
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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
[ 1 ]
[ 2 ]
4.1.2
Communications Errors (For MFC only).................................................... 4-25
4.2
TROUBLESHOOTING ........................................................................................... 4-32
4.2.1
Introduction................................................................................................ 4-32
4.2.2
Precautions ............................................................................................... 4-32
4.2.3
Checking Prior to Troubleshooting ............................................................ 4-32
4.2.4
Troubleshooting Based on Problem Type ................................................. 4-34
[ 1 ]
[ 2 ]
[ 3 ]
[ 4 ]
[ 5 ]
[ 6 ]
[ 7 ]
[ 8 ]
[ 9 ]
4.2.5
Problems Encountered Frequently in the Past.......................................... 4-43
[ 1 ]
[ 2 ]
[ 3 ]
4.2.6
Possible Component Defects and Resulting Problems............................. 4-46
[ 1 ]
[ 2 ]
CONTENTS
Error messages appearing on the LCD............................................. 4-2
Control panel and LCD problems ...................................................... 4-34
FAX/Telephone problems (For MFC only)......................................... 4-34
Communications problems (For MFC only) ...................................... 4-35
Paper/document feeding problems ................................................... 4-35
Print-image problems ........................................................................ 4-36
PC-driven printing problems.............................................................. 4-41
Printing from memory cards--Compact Flash*1, Memory Stick,
SD Memory Card, xD-Picture Card (For models with
PhotoCapture Center*2) and USB flash memory drive..................... 4-42
Wireless LAN (WLAN)*2 ................................................................... 4-42
Others ............................................................................................... 4-42
Paper jams ........................................................................................ 4-43
Ink-related problems ......................................................................... 4-44
ADF mechanism (For models with ADF)........................................... 4-46
Scanner mechanism ......................................................................... 4-47
Confidential

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