Mechanical Components; Laser Components; Fuser Components; Safety Components - Lexmark W820 Service Manual

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 motor is running.

Laser Components

CAUTION: This 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.
To avoid permanent eye damage, follow these directions:
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Fuser Components

CAUTION: This printer uses heat to fuse the toner image to a sheet paper. The Fuser
Assembly is very hot. Switch off printer power and wait at least 45 minutes for the fuser to
cool before you attempt to service the Fuser Assembly or adjacent components.

Safety Components

Make sure covers and panel are in place and that all interlock switches are all functioning
correctly after you have completed a printer service call. If you bypass, or cheat, an
interlock switch during a service call, use extreme caution when working on or around the
printer.
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Service Manual
Before starting any service procedure, switch off the printer power and unplug the
power cord from the AC wall outlet.
Do not disassemble the Printhead Assembly or any laser component that displays a
Laser Warning sticker.
Use caution when you are working around the Printhead 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.
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