Lexmark MS621 Service Manual

Service menus........................................................................................... 137
Understanding the printer control panel....................................................................................................137
Using the printer control panel...............................................................................................................................137
Understanding the status of the power button and indicator light...............................................................138
Using the home screen.............................................................................................................................................138
Diagnostics menu............................................................................................................................................ 140
Entering the Diagnostics menu ..............................................................................................................................140
Reports..........................................................................................................................................................................140
Advanced Print Quality Samples............................................................................................................................140
Event Log......................................................................................................................................................................140
Input tray quick print...................................................................................................................................................141
Output bin quick feed ...............................................................................................................................................142
Printer Setup................................................................................................................................................................142
Printer diagnostics and adjustments.....................................................................................................................144
Additional input tray diagnostics............................................................................................................................146
Configuration Menu.........................................................................................................................................147
Service Engineer menu..................................................................................................................................150
Entering Invalid engine mode.................................................................................................................................150
Entering the Service Engineer (SE) menu............................................................................................................150
General SE ...................................................................................................................................................................150
Network SE ..................................................................................................................................................................150
Parts removal.............................................................................................153
Removal precautions...................................................................................................................................... 153
Data security notice...................................................................................................................................................153
Handling ESD‑sensitive parts..................................................................................................................................154
Controller board/control panel replacement ......................................................................................................155
Restoring the printer configuration after replacing the controller board ....................................................155
Restoring solutions, licenses, and configuration settings ...............................................................................158
Updating the printer firmware ................................................................................................................................159
Backing up eSF solutions and settings ................................................................................................................160
Disconnecting ribbon cables....................................................................................................................................161
Ribbon cable connectors ..........................................................................................................................................161
Zero Insertion Force (ZIF) connectors...............................................................................................................161
Horizontal top contact connector .....................................................................................................................162
Horizontal bottom contact connector..............................................................................................................165
Vertical mount contact connector.....................................................................................................................168
Horizontal sliding contact connector ................................................................................................................171
Low Insertion Force (LIF) connector.................................................................................................................174
Printhead assembly adjustment .............................................................................................................................175
Removal procedures....................................................................................................................................... 177
Left side removals............................................................................................................................................ 177
4600-830, -835, -895
Table of contents
5

Lexmark MS621 Specifications

General

Print Technology	Monochrome Laser
Print Resolution	1200 x 1200 dpi
Standard Memory	512 MB
Maximum Memory	2560 MB
Standard Input Capacity	650 pages
Maximum Input Capacity	2300 pages
Standard Output Capacity	250 pages
Maximum Output Capacity	250 pages
Connectivity	USB, Ethernet
Recommended Monthly Page Volume	2, 000 - 20, 000 pages
Media Types Supported	Plain, Cardstock, Labels, Envelopes
Processor	1 GHz
Supported Operating Systems	Windows, macOS, Linux
Duplex Printing	Standard