Preface; Change History - Lexmark X746de Service Manual

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Preface

This manual contains maintenance procedures for service personnel. It is divided into the following chapters:
General information contains a general description of the MFP and the maintenance approach used to
1.
repair it. Special tools and test equipment, as well as general environmental and safety instructions, are
discussed.
Diagnostic information contains an error indicator table, symptom tables, and service checks used to
2.
isolate failing field replaceable units (FRUs).
3. Diagnostic aids contains tests and checks used to locate or repeat symptoms of MFP problems.
Repair information provides instructions for making MFP adjustments and removing and installing FRUs.
4.
Connector locations uses illustrations to identify the connector locations and test points on the MFP.
5.
Preventive maintenance contains the lubrication specifications and recommendations to prevent
6.
problems.
Parts catalog contains illustrations and part numbers for individual FRUs.
7.
Appendix A contains service tips and information.
Appendix B contains representative print samples.

Change history

Revision date
2013/08/02
2013/07/22
2013/06/25
2012/12/05
2012/10/30
2012/6/8
2012/5/30
Service Manual
xx
Updates
Added the topic
"Steps before starting the 9yy service checks" on page
Updated groupings to items 1 and 3 in the illustration in Assembly 3 of the parts catalog.
Added CPU fan removals and parts catalog entry.
• Added 282.01, 284.01, and 920.26 error codes in the
cover open service check" on page
• Added 906.05-906.08 error codes in the
(aligner) error service check" on page
• Updated
"950.00–950.29—EPROM mismatch failure" on page
• Changed the following error codes:
• 293 to 280.06
• 290 to 282.01
• 291 to 283.01
• 292 to 283.05
• Added the following error codes:
• 284.01
• 285.01
• 285.05
Added
"Print quality—white gapping" on page
• Changed PN 40X8307 to 40X6401 in th e Parts Catalog chapter.
• Added
"Cartridge guide wheel removal" on page
"282.01, 284.01, 290.26—ADF
2-143.
"147.xx, 906.05-906.08, 920.01—Motor
2-59.
2-137.
2-160.
4-55.
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