Introduction; Maintenance Approach; Tools Required For Service; Symbols Used In This Manual - Lexmark W820 - Optra B/W Laser Printer Service Manual

1. Introduction

Maintenance Approach

The diagnostic information in this manual leads you to the correct field replaceable unit
(FRU) or part for the Finisher. Use the error code table, attendance message table, error
code service checks and attendance message service checks to determine the corrective
action necessary to repair the failing option. After you complete the repair, perform tests
as needed to verify the repair.

Tools Required For Service

The removal and replacement procedures described in this manual require the following
tools and equipment:
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Symbols Used in this Manual

Various symbols are used throughout this manual to either provide additional information
on a specific topic or to warn of possible danger that might be present during a procedure
or action. Be aware of all symbols when they are used, and always read NOTE,
CAUTION, and WARNING messages.
Note: A NOTE may indicate an operating or maintenance procedure, practice, or
condition that is necessary to efficiently accomplish a task. A NOTE may also provide
additional information related to a specific subject or add a comment on the results
achieved through a previous action.
WARNING: A WARNING indicates an operating or maintenance procedure, practice, or
condition that, if not strictly observed, could result in damage to, or destruction of,
equipment.
CAUTION: A CAUTION indicates an operating or maintenance procedure, practice, or
condition that, if not strictly observed, could result in injury.

Safety Details

Follow all safety instructions to prevent accidents while servicing the printer and attached
options. Always be aware of the potential dangers that are present when you are working
with electrical or mechanical equipment.
4025-Finisher
Magnetic tip Phillips screwdrivers, large and small
Flat-blade screwdrivers
Analog volt ohmmeter (a digital volt ohmmeter may also be used)
1-1
Introduction