Xerox Phaser 7700 Service Manual page 3

Power Supply and Electrical Components: Before starting any service procedure,
switch off the printer power and unplug the power cord from the wall outlet. If
you must service the printer with power applied, be aware of the potential for
electrical shock.
Do not touch any electrical component unless you are instructed to do so by a service
procedure.
Mechanical Components: Manually rotate drive assemblies to inspect and gears.
Do not try to manually rotate or manually stop the drive assemblies while any
printer motor is running
Laser Components:
WARNING:
This printer generates a laser beam as part of the printing process.
The laser beam in this printer is invisible. Direct eye exposure to the
laser beam may cause eye injury or blindness.
To avoid permanent eye damage, follow these directions:
Before starting any service procedure, switch off the printer power and unplug
the power cord from the AC wall outlet.
Do not disassemble the Laser Scanner Assembly.
Use caution when you are working around the Laser Scanner Assembly or
when you are performing laser related troubleshooting or repair procedures.
Never place a mirror or a reflective tool or object in the laser beam path.
Do not disassemble the printer in such a way that the laser beam can exit the
print engine during a print cycle.