Lexmark MS521dn MS421dn MS421dw MS321dn B2546dn B2442dw B2338dw M1246 M1242 Service Manual and Parts List Manual

Machine type / model: 4600‑230 4600‑238 4600‑430 4600‑438 4600‑490 4600‑630 4600‑690

Accurate, clear and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Present service manual and parts list manual Lexmark MS521dn MS421dn MS421dw MS321dn B2546dn B2442dw B2338dw M1246 M1242 contain clear instructions and procedures on how to fix the problems occurring in your equipment.
The information contained in this repair manual is necessary for the repair, but also prevention, resulting in a longer life of your equipment.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
To see what contain, please read table of contents:

Product information
Edition notice
Notices, conventions, and safety information
Laser notice
Safety information
General caution statements
Change history
Change history

Printer model configurations
Finding the serial number
Supported paper sizes, types, and weights
Supported paper sizes
Supported paper types
Supported paper weights
Tools required for service

Troubleshooting overview
Performing the initial troubleshooting check
Fixing print quality issues
Initial print quality check
Gray background or toner fog check
Blank pages check
Print is too dark check
Print is too light check
Paper curl check
Folded or wrinkled paper check
Solid black pages check
Repeating defects check
Skewed print check
Streaked vertical lines appear on prints check
Horizontal light bands check
Vertical light bands check
Vertical dark bands check
Vertical dark streaks with print missing check
White streaks and voided areas check
Fine lines are not printed correctly (specifically Chinese characters) check
Clipped pages or images check
Compressed images appear on prints check
Incorrect margins on prints check
Toner rubs off check
Toner specks appear on prints check
Paper jams
Avoiding jams
Identifying jam locations
Paper jam in door A
Paper jam in the rear door
Paper jam in the standard bin
Paper jam in the duplex unit
Paper jam in trays
Paper jam in the multipurpose feeder
200 paper jams
202 paper jams
230 paper jams
240-241 paper jams
242-244 paper jams
User attendance messages (0-99.99)
User attendance messages
Unsupported or unresponsive toner cartridge service check
Unsupported or unresponsive imaging unit service check
Mismatched supplies error service check
Maintenance kit low service check
Printer hardware errors
111 errors
121 errors
126 errors
128 errors
133 errors
140 errors
155 errors
16y errors
171 errors
6yy errors
Procedure before starting the 9yy service checks
900 errors

Understanding the printer control panel
Using the printer control panel
Understanding the status of the power button and indicator light
Diagnostics menu
Entering the Diagnostics menu
Advanced Print Quality Samples
Event Log
Input tray quick print
Output bin quick feed
Printer Setup
Printer diagnostics and adjustments
Additional input tray diagnostics
Config Menu
Service Engineer menu
Entering Invalid engine mode
Entering the Service Engineer (SE) menu
General SE
Network SE

Removal precautions
Data security notice
Handling ESD-sensitive parts
Controller board/control panel replacement
Restoring the printer configuration after replacing the controller board
Restoring solutions, licenses, and configuration settings
Updating the printer firmware
Backing up eSF solutions and settings
Disconnecting ribbon cables
Ribbon cable connectors
Zero Insertion Force (ZIF) connectors
Horizontal top contact connector
Horizontal bottom contact connector
Vertical mount contact connector
Horizontal sliding contact connector
Low Insertion Force (LIF) connector
Printhead assembly adjustment
Removal procedures
Left side removals
Left cover removal
Main drive gearbox removal
MPF gearbox removal
Fuser actuator removal
Reverse solenoid removal
Cartridge gearbox removal
MPF solenoid removal
Pick roller clutch removal
Right side removals
Right cover removal
Interconnect cable removal
Sensor (tray present) removal
Cooling fan removal
Controller board removal
Toner cartridge smart chip contact removal
Cartridge barrel shutter sensor kit removal
Front removals
Nameplate removal
MPF with front access cover removal
Control panel assembly removal
Control panel (2.4 inch display) flat cable removal
Control panel (2.4 inch display) cover, buttons, and board removal
Control panel display (2-line) removal
Transfer roller removal
Jam access cover removal
Sensor (front door) removal
MPF pick roller and separator pad removal
Sensor (MPF paper present) removal
Front input guide removal
Bottom removals
Power supply removal
Duplex assembly removal
Sensors (duplex and input) removal
Sensor (toner density) removal
Sensor (trailing edge) removal
Pick roller assembly removal
Rear side removals
Rear door and cover removal
Fuser removal
Redrive assembly removal
Sensor (bin full) removal
Redrive gear plate removal
Top side removals
Top cover removal
Printhead removal
Optional 250/550-sheet tray removals
Separator roller assembly removal

Printer configurations
Attaching cables
Printer roller locations
Printer sensor locations
Controller board connectors

Inspection guide
Scheduled maintenance
Maintenance kits
Resetting the maintenance counter
Lubrication specification
Cleaning the printer
Cleaning the printhead lenses

Assembly 1: Covers
Assembly 2: Control panel
Assembly 3: Electronics 1
Assembly 4: Electronics 2
Assembly 5: Electronics 3
Assembly 6: Electronics 4
Assembly 7: Paper transport 1
Assembly 8: Paper transport 2
Assembly 9: MPF and standard tray
Assembly 10: Optional trays
Assembly 11: Maintenance kits (MS521, B2546, and M1246)
Assembly 12: Miscellaneous

Power consumption
Product power consumption
Sleep Mode
Hibernate Mode
Off mode
Total energy usage
Selecting a location for the printer
Noise emission levels
Temperature information

Available internal options
Input/output configurations and capacities

POR sequence
Print cycle operation
Print engine layout
Print cycle
Printer operation
Printer sections
Printer paper path
Printer paper path sensors
Main drive
Tray drive

Part number index
Part name index

Lexmark MS321 MS421 MS521 M124x B2338 B2442 B2546 4600‑230 4600‑238 4600‑430 4600‑438 4600‑490 4600‑630 4600‑690 Lexmark MS521dn MS421dn MS421dw MS321dn B2546dn B2442dw B2338dw M1246 M1242

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