Preface - Lexmark W820 Service Manual

Preface

This manual describes the options for the Lexmark
Duplex Unit, Mailbox, and High Capacity Feeder. It contains maintenance procedures for
service personnel only and is divided into the following chapters:
1.
2.
3.
4.
5.
6.
7.
4025 Options
General Information contains a general description of the printer options and the
maintenance approach used to repair them. Special tools and test equipment are
listed, as well as general environmental and safety instructions.
Diagnostic Information contains an error indicator table, symptom tables, and
service checks used to isolate failing field replaceable units (FRUs).
Diagnostic Aids contains tests and checks used to locate or repeat symptoms of
printer option problems.
Repair Information provides instructions for removing and installing FRUs.
Connector Locations uses illustrations to identify the connector locations and test
points on the options.
Preventive Maintenance contains the lubrication specifications and
recommendations to prevent problems.
Parts Catalog contains illustrations and part numbers for individual FRUs.
TM
W820 printer: Envelope Feeder,
ix
Preface