Lexmark X651de, X652de, X654de, X656de, X658de Service Manual

Lexmark X651de–X658de Series Technical Documentation

• Covers the 2010 Lexmark X651de, X652de, X654de, X656de, and X658de laser MFP series including duplex-enabled and high-capacity tray variants
• Original OEM publication P/N 12G9823, revision dated September 21, 2010
• Includes 124 distinct error-code troubleshooting tables, 15+ mechanical removal and installation procedures for fuser assemblies, and full paper-path sensor diagrams
• Downloads to your account within seconds of checkout
• Your order stays downloadable from your account for life
• OCR text layer lets you jump to a torque spec by keyword
• Suitable for printing individual sections for shop-floor use
• This 663-page document is the primary reference used for factory-level maintenance of the Machine Type 7462 series, providing definitive diagnostics for internal component faults

Diagnostic and Service Scope

This factory manual provides technical diagnostic data for the Lexmark X651de through X658de family of printers. Coverage extends to start-up diagnostics, power-on reset sequences, and the comprehensive error-code table for attendance messages. The text addresses complex issues such as printhead synchronization errors, laser power signal failure, and mechanical load errors within the main drive motor assembly. Detailed procedures assist with field-replaceable unit maintenance, covering the ADF unit, fuser assembly, and paper path sensors.

Specification and Reference Data

Technical specifications document operational parameters for various tray assemblies including the HCIT, 250-sheet, and 550-sheet trays. Intake sensor threshold data for the X651de–X658de series ensures accurate diagnostics during paper path jams. The guide provides reference values for the printhead motor and fuser control methods. Understanding what factory workshop documentation is structured assists technicians in locating specific parts for the 7462-series. Essential reference data includes:

• Sensor (input) service checks are provided for media path verification.
• Fuser unit assembly type 1 and type 2 configurations are documented for replacement.
• LVPS card assembly voltage specifications are maintained within the electrical component section.

All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 663-page Lexmark OEM service manual covering the 2010 X651de–X658de series, documenting diagnostic, electrical, and mechanical maintenance procedures for the 7462-series hardware.