Clear Choice Technical Services

LEXMARK MB2650, MX622, XM3250 Service Manual and Parts Manual

Home » Shop » LEXMARK MB2650, MX622, XM3250 Service Manual and Parts Manual

LEXMARK MB2650, MX622, XM3250 Service Manual and Parts Manual


Note: Up to 5 downloads only. Make sure to save your copy.

Categories: Lexmark, Manuals Tags: MB2650, MX622, XM3250


Service Manual Table of Contents

General information

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

Diagnostics and troubleshooting

Troubleshooting precautions

Troubleshooting overview
Performing the initial troubleshooting check
Power‑on Reset (POR) sequence
Using Safe Mode

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
200 paper jams
202–221 paper jams
230 paper jams
240–241 paper jams
242–244 paper jams
280 paper jams
281 paper jams
284 paper jams
29y paper jams
4yy 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
95y errors

ADF/Scanner hardware errors
84y errors

Other symptoms
Fax symptoms
Base printer symptoms

Service menus

Understanding the printer control panel
Using the control panel
Understanding the status of the power button and indicator light
Using the home screen

Diagnostics menu
Entering the Diagnostics menu
Advanced Print Quality Samples
Format Fax Storage
Event log
Input tray quick print
Output bin quick feed
Printer Setup
Printer diagnostics and adjustments
Scanner diagnostics
Additional input tray diagnostics
Output device diagnostics

Configuration Menu

Entering Invalid engine mode

Entering Recovery mode

Service Engineer menu
Entering the Service Engineer (SE) menu
General SE Menu
Network SE Menu
Fax SE Menu
Scanner SE Menu

Parts removal

Removal precautions
Data security notice
Handling ESD‑sensitive parts
Critical information for controller board or 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
MPF solenoid removal
Cartridge gearbox removal

Right side removals
Right cover removal
Hard drive removal
Interconnect cable removal
Sensor (tray present) removal
Cooling fan removal
Controller board removal
Fax card removal
Toner cartridge smart chip contact removal
Cartridge barrel shutter sensor kit removal

Front removals
Nameplate removal
MPF with front access cover removal
Top access cover removal
Bezel removal
Control panel display assembly removal
Control panel covers and buttons removal
Scanner front cover removal
Speaker removal
Control panel flat cable 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
Front USB host cable removal

Bottom removals
Power supply removal
Duplex removal
Sensors (duplex and input) removal
Sensor (index) removal
Pick roller assembly removal
Motor (pick) assembly removal
Sensor (toner density) removal
Sensor (paper present) removal
Sensor (trailing edge) removal
Paper present sensor flag removal
Pick/lift motor gearbox removal
Lift cam removal
Sensor (narrow media) removal

Rear side removals
Scanner rear cover removal
Rear door and cover removal
Redrive assembly removal
Fuser removal
Redrive gear assembly removal

Top removals
Top cover removal
Sensor (bin full) removal
Printhead removal

ADF/scanner removals
ADF restraint pad removal
ADF roller removal
ADF separator roller removal
ADF tray removal
Scanner assembly removal
ADF assembly removal
ADF left hinge removal
ADF right hinge removal
ADF access door removal
Flatbed scanner assembly removal
ADF flat cable removal
ADF cable removal

Optional 550-sheet tray removals
Separator roller assembly removal

Optional staple finisher removals
Staple finisher option removal
Stapler cartridge access door removal
Staple roll holder removal
Stapler right cover removal
Stapler left cover removal
Stapler rear door removal
Sensor (stapler access door) removal
Stapler carriage assembly removal
Stapler door close limit switch removal
Motor (stapler paddle) removal
Stapler rear cover removal
Sensor (stapler rear cover) removal
Trapped staple access door removal
Stapler service cover removal
Stapler controller board removal
Motor (stapler left tamper) removal
Motor (stapler right tamper) removal
Stapler rear cover close limit switch removal
Stapler cooling fan removal
Stapler power supply unit removal
Stapler interface cable removal
Stapler top cover removal
Sensor (stapler bin full receive) removal
Sensor (stapler bin full send) removal
Sensor (stapler pass through) removal
Tamper main assembly removal
Tamper sub-assembly removal
Tamper drive belt removal
Diverter gearbox removal
Stapler accumulator assembly removal
Sensor (stapler right tamper HP) removal
Sensor (stapler left tamper HP) removal
Sensor (stapler paddle HP) removal

Component locations

Printer configurations
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 printer
Cleaning the scanner
Cleaning the printhead lenses

Parts catalog

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: Imaging
Assembly 12: Fax card and hard disk
Assembly 13: Staple finisher option
Assembly 14: Staple finisher (right)
Assembly 15: Staple finisher (top)
Assembly 16: Staple finisher (rear)
Assembly 17: Staple finisher exit assembly
Assembly 18: Staple finisher tamper assembly
Assembly 19: Staple finisher accumulator assembly
Assembly 20: Maintenance kits
Assembly 21: Miscellaneous

Copier Lease Request

This will close in 0 seconds

Service Request

Quality and Affordable Service, Repair, and Maintenance for Your Copiers and Printers

Your business productivity is important to us, which is why we provide a hassle-free and affordable service for all models of copiers and printers in any condition. We offer great value for the money when it comes to our repair and maintenance services.

  • Factory certified and highly qualified service technicians
  • A highly trained service technician onsite within 24-48 hours
  • Affordable rates starting at $85/hour
  • High inventory of repair and replacement parts for most copier and printer brands

We are a one-stop shop for all your copier and printer repair and maintenance needs. 70% of our service requests are resolved on the 1st visit. You are guaranteed prompt and quality service wherever you are in the US.

For fast, reliable, and quality maintenance and repair for your copiers and printers, the choice is clear: Clear Choice Technical Services!

For an accurate diagnosis and a faster transaction time, please fill out the form below.

This will close in 0 seconds

Remote Computer/Copier/Printer Support

Remote Support Information

*Copier and Printer

We typically connect to your computer, which should be on the same network as the copier. This allows us to access the copier's Web Interface for more effective troubleshooting and to adjust any settings that may require modification or configuration.


We will explore various troubleshooting steps, and if the issue is related to the network, we may discuss it over the phone without remote access until we resolve the problem.

Machine Capability

Please confirm if your copier can still copy or print standalone (e.g., without any computer or network connection) to ensure we address your issue effectively. Complete this questionnaire to the best of your ability, and we will get back to you promptly to schedule remote support. Thank you for choosing our services, and we look forward to assisting you.

This will close in 0 seconds

Maintenance Contract

    This will close in 0 seconds