Lexmark W820 Service Manual - Page 13

1. Introduction 4025-Finisher 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: • Magnetic tip Phillips screwdrivers, large and small • Flat-blade screwdrivers • Analog volt ohmmeter (a digital volt ohmmeter may also be used) 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. Introduction 1-1