Printer Power Supply And Electrical Components; Mechanical Components; Printer Laser Components - Lexmark W820 Service Manual

4025 Options

Printer 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 options with the printer power applied, be
aware of the potential for electrical shock.
CAUTION: 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 sprockets and gears.
CAUTION: Do not try to manually rotate or manually stop the drive assemblies while any
printer or option motor is running.

Printer Laser Components

CAUTION: The printer generates a laser beam as part of the printing process. The laser
beam is a concentrated narrow beam of light that produces extreme heat at its focal point.
The laser beam in this printer is invisible. Although you cannot see the beam, it can still
cause severe damage. Direct eye exposure to the laser beam may cause eye injury or
blindness.
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Service Manual