Canon Pixma MP620 / MP620B Service & Repair Manual

• Servicing the 2008–2010 Canon Pixma MP620 and MP620B inkjet photo all-in-one printers requires accurate reference material.
• This official 44-page Canon U.S.A. publication combines the 2008 Service Manual and the 2009 Parts Catalog into a single technical resource.
• Documents the mechanical assembly, electrical error codes, and factory-standard adjustment procedures needed for accurate bench diagnostics.
• Features 12 detailed exploded-view diagrams, 15 troubleshooting symptom tables, and a complete adjustment index for service-mode initialization.
• Serves as the definitive reference standard for addressing the QM3-3716-000 cassette unit and related print engine components.

Component and Maintenance Breakdown

The documentation maps out the exact maintenance, error reporting, and disassembly logic for this printer series. Content begins with a structured maintenance section that defines service-level adjustments for the logic board, ink absorber, and carriage unit. You will find critical data for error interpretation here. It directly translates blinking LED codes to specific system failures, covering carriage errors, line feed issues, and ink sensor faults.

Repair sections detail the teardown process for the external housing, scanner unit, operation panel, logic board, and ink purge drive system. Addendums provide updated instructions for print unit removal and logic board support plate management. The publication concludes with verification procedures to confirm print engine performance post-service. This includes test pattern generation and EEPROM information reporting to help accurately identify specific component part numbers.

Specifications and Reference Values

Technical specifications document the operational parameters for the Pixma MP620, including the 25 ppm maximum print speed and 1200 dpi resolution threshold. Maintenance data lists the correct factory grease application (FLOIL KG-107A) for the carriage rail and APP code wheel gear shaft surfaces. Reference values for ink absorber counters are documented at 10% increments for precise EEPROM setting calibration.

Specific voltage and electrical values are listed for the AC adapter (100V-240V 50/60HZ). To ensure personal safety and prevent logic board damage during bench work, technicians must adhere to the specified capacitor discharge wait time. Always allow approximately one minute after removing the power cord before handling any internal components. The logic board assembly requires 64 MB of buffer capacity during standard operation.