Lexmark MS621 Service Manual

Table of contents
Product information......................................................................................2
Edition notice.................................................................................................2
Notices, conventions, and safety information.......................................... 9
Laser notice...........................................................................................................................................................9
Conventions.........................................................................................................................................................12
Safety information.............................................................................................................................................. 13
General caution statements............................................................................................................................ 18
Change history............................................................................................ 19
Change history....................................................................................................................................................19
General information....................................................................................21
Printer model configurations...........................................................................................................................21
Finding the serial number................................................................................................................................ 21
Paper support.....................................................................................................................................................22
Supported paper sizes............................................................................................................................................... 22
Supported paper types.............................................................................................................................................. 23
Supported paper weights ......................................................................................................................................... 24
Tools required for service................................................................................................................................24
Diagnostics and troubleshooting............................................................. 25
Troubleshooting overview.............................................................................................................................. 25
Performing the initial troubleshooting check.......................................................................................................25
Fixing print quality issues................................................................................................................................25
Initial print quality check............................................................................................................................................ 26
Gray background or toner fog check..................................................................................................................... 27
Blank pages check...................................................................................................................................................... 29
Print is too dark check................................................................................................................................................ 35
Print is too light check.................................................................................................................................................37
Paper curl check.......................................................................................................................................................... 40
Folded or wrinkled paper check .............................................................................................................................. 41
Solid black pages check............................................................................................................................................ 42
Repeating defects check........................................................................................................................................... 45
Skewed print check .................................................................................................................................................... 46
Streaked vertical lines appear on prints check ................................................................................................... 48
Horizontal light bands check.................................................................................................................................... 49
4600-830, -835, -895
Table of contents
3

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