
Troubleshooting and routine maintenance
157
C
Cleaning the corona wires
C
If you have print quality problems, clean the
corona wires as follows:
a
Turn off the machine’s power switch.
Unplug the telephone line cord first,
disconnect all cables, and then unplug
the power cord from the AC power
outlet.
b
Fully open the top cover by lifting up on
the handle (1).
IMPORTANT
When the scanner is open, you cannot
open the top cover.
c
Take out the drum unit and toner
cartridge assemblies.
IMPORTANT
• We recommend that you place the drum
unit and toner cartridge assembly on a
clean, flat surface with a sheet of
disposable paper or cloth underneath it in
case you accidentally spill or scatter toner.
• To prevent damage to the machine from
static electricity, DO NOT touch the
electrodes shown in the illustration.
1
Summary of Contents for MFC-9120CN
Page 1: ...USER S GUIDE MFC 9120CN MFC 9320CW Version A USA CAN ...
Page 16: ...xiv ...
Page 100: ...Chapter 11 84 ...
Page 101: ...Section III Copy III Making copies 86 ...
Page 120: ...Chapter 14 104 ...
Page 121: ...Section V Software V Software and Network features 106 ...