Brother HL 1240 - B/W Laser Printer Service Manual page 216

Definitions of Warnings, Cautions, and Notes
The following conventions are used in this User's Guide:
Warning
Indicates warnings that must be observed to prevent possible personal injury.
!
Caution
Indicates cautions that must be observed to use the printer properly or
prevent damage to the printer.
Note
Indicates notes and useful tips to remember when using the printer.
To Use the Printer Safely
Warning
After you have just used the printer, some internal parts of the
printer are extremely hot. When you open the front cover or rear
cover of the printer, never touch the shaded parts shown in the
following illustration.
cleaning the printer, make sure you have turned off the power switch
and unplugged the power cord from the power outlet.
High Temperature
Front view
There are high voltage electrodes inside the printer. Before
Turning off the Power Switch and Unplug the Printer
TABLE OF CONTENTS
High Temperature
Rear view