2008 Canon MP630 / MP638 Inkjet Printer Service Manual (P/N QY8-13CB-000)

The 2008 Canon MP630 / MP638 Service Manual, QY8-13CB-000, Revision 0, covers maintenance, diagnostics, and repair of these multifunction inkjet printers. Regional coverage includes versions with and without CD/DVD printing.

Text search and navigation: The main text and tables are searchable; lettering within images and test-print samples is not. There are no embedded PDF bookmarks. Small labels in the lubrication drawings need zooming.

• Error diagnosis: Operator Call and Service Call tables, LED indications, LCD messages, and Troubleshooting by Symptom for paper-feed, print, and scan faults.

• Paper feed and carriage: ASF unit removal, carriage unlocking, carriage unit removal, spur and platen unit removal, and paper feed motor adjustment.

• Ink system service: Ink absorber replacement, purge drive system and switch system unit removal, print head deep cleaning, and ink system function checks.

• Logic board settings: EEPROM initialization, destination settings, ink absorber counter resetting and value transfer, with EEPROM information print references.

• Alignment and correction: Automatic and manual print head alignment, LF/Eject correction, and CD/DVD print position correction for supported regional models.

• Scanner and controls: Scanner unit and document pressure sheet replacement notes, operation panel removal, and button, LCD, and Easy-Scroll Wheel tests.

This manual is written for qualified service technicians working on these printers.

Error Codes and Fault Isolation

The error tables connect each indication with fault conditions, check points, and possible replacement items. Examples include B200 VH monitor errors, 5B00/5B01 ink absorber errors, 5100 carriage errors, and scanner faults.

Troubleshooting distinguishes rear-tray ASF faults from cassette PF pick-up faults, helping narrow a paper-feed problem to the affected mechanism before parts are selected.

EEPROM information print references cover stored error information and absorber data. The Service test print sample also shows ink system and CD/DVD sensor check results.

Disassembly, Wiring, and Parts Catalog Scope

Photographs document external housing, scanner unit, and document cover removal, internal cable routing, and access to the paper feed mechanism and carriage assembly.

Cable wiring and connection shows right-side wiring, ink sensor and inner cover open sensor cables, and left-side grounding. These are routing photographs, not electrical circuit schematics.

Canon states that the manual alone is insufficient for complete disassembly and reassembly and refers to a separate Parts Catalog for additional graphics. That catalog is not included.

Calibration and Service Tool Requirements

Service-mode procedures use Canon's Service Tool, which the manual specifies for a pre-registered computer. Service Tool software is not included with the PDF.

The replacement table links each component to its required adjustments and post-repair checks. Absorber replacement thresholds are covered, along with the distinction between resetting the counter after absorber replacement and transferring its value when fitting a logic board.

LF/Eject correction after roller, platen, encoder, or logic board work includes a pattern chart and explains how saved values supersede the factory E-MIP setting.

Grease application drawings and tables specify FLOIL KG-107A, tool number QY9-0057-000, for the carriage rail, related sliding surfaces, and Easy-Scroll Wheel base. Automatic print head alignment specifies Matte Photo Paper MP-101; manual alignment uses plain paper.

Repair Precautions and Final Checks

Before proceeding with any internal checks, always ensure the device is completely disconnected from power to prevent electrical shock. The manual also addresses capacitor discharge and static protection for electronic components.

Repair notes flag the LCD cable's vulnerability during panel work and the risk of damaging timing slit films through scratches, bending, or grease contamination.

The Standard inspection flow covers nozzle-check printing, copying, USB printing from both paper sources, and relevant direct-print or communication functions. Transportation notes address carriage locking and protection of the print head after repair.

English PDF and Included Pages

One printable English PDF contains 47 pages total: one cover/publication page, one table-of-contents page, and 45 numbered service pages. Both front-matter pages are already included in the total.