Brother MFC-8420 User Manual page 20

22
Troubleshooting and routine maintenance ..................... 22-1
Troubleshooting ............................................................. 22-1
Error messages ........................................................ 22-1
Document jams......................................................... 22-5
Paper jams ............................................................... 22-6
If you are having difficulty with your MFC............... 22-12
Improving the print quality ...................................... 22-17
Packing and shipping the MFC..................................... 22-21
Routine maintenance.................................................... 22-24
Cleaning the scanner.............................................. 22-24
Cleaning the printer ................................................ 22-25
Cleaning the drum unit ........................................... 22-26
Replacing the toner cartridge ................................. 22-27
How to replace the toner cartridge ......................... 22-27
Replacing the drum unit.......................................... 22-32
Checking the drum life............................................ 22-35
Page Counter ......................................................... 22-35
23
Optional accessories ......................................................... 23-1
Memory board ................................................................ 23-1
Installing the optional memory board........................ 23-2
Network (LAN) board...................................................... 23-5
Before starting installation ........................................ 23-6
Step 1: Hardware installation.................................... 23-6
Step 2: Connecting the NC-9100h to an Unshielded
Paper Tray #2......................................................... 23-11
G
Glossary .............................................................................. G-1
Document is jammed in the top of the ADF unit. .. 22-5
Document is jammed inside the ADF unit. ........... 22-5
Paper is jammed in the duplex tray
(For MFC-8820D) ........................................... 22-10
Twisted Pair 10BASE-T or 100BASE-TX Ethernet
Network ................................................................ 23-9
LED ...................................................................... 23-9
TEST SWITCH ................................................... 23-10
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