Canon MultiPASS MP730 / MP700 Service Manual (P/N HY8-19B3-000)

This Canon Revision 0 service manual, dated April 2003 and carrying cover code HY8-19B3-000, covers the MultiPASS MP730 and MP700 in their listed 120V USA, Canadian, and Latin American configurations. It also supplies general, G3/color communication, scanning, printer, copy, and photo-print specifications. The 150-page PDF is suited to experienced printer/fax technicians and advanced repairers who are comfortable with ESD-safe circuit-board handling, service-mode diagnostics, and illustrated mechanical repair work. Coverage centers on fault isolation, selected component replacement, adjustments, and service test functions rather than basic operator instruction.

• Exact application data covers MultiPASS MP730 H12-2692 (120V USA), MP730 H12-2696 (120V CND/LTN), MP700 H12-2702 (120V USA), and MP700 H12-2706 (120V CND). MP730-only material is clearly identified for the ADF, NCU, telephone-line, and facsimile functions.
• Mechanical coverage explains the carriage, purge, ASF/paper-feed, paper-eject, contact-sensor, and MP730 document-feed assemblies, including their motors, rollers, encoder films, and detection sensors.
• Illustrated repair procedures cover removal and replacement of the SPCNT board and ROM, MP730 NCU board, operation panel, contact sensor, print and ASF assembly, power-supply unit, and MP730 separation unit and guide.
• Troubleshooting addresses display messages and service codes as well as no-power faults, abnormal panel operation, paper pickup, carriage movement and home-position errors, print-quality defects, scanner and ADF failures, memory-card faults, and G3 communication problems.
• Adjustment and diagnostic coverage includes CS LED lights-on duration, printhead position alignment, nozzle checks, D-RAM and contact-sensor tests, print test patterns, panel and sensor checks, MP730 modem/NCU frequency and G3/V.34 signal tests, line detection, and waste-ink counter reset.
• Reference graphics include the Mechanical Layout, Electrical Layout, Sensor Layout, Scanning Section, Test Mode Menu, and full-system Wiring Diagram. The Wiring Diagram documents board and assembly interconnections at connector level; it is not a set of board-level circuit schematics.

What the Technical Reference Adds

The printer theory ties the carriage, purge, and paper-feed sections together rather than treating them as unrelated parts. It explains carriage home-position detection and encoder-film feedback, the purge motor's control of suction, capping, wiping, valve operation, and carriage locking, and the optical ink-sensing method. A cleaning-mode table identifies the conditions that trigger printhead cleaning or suction. The maintenance list covers consumables and cleaning locations while stating that no periodic inspection or periodic replacement parts are assigned.

The service-data section shows how settings are registered from the operation panel and maps SSSW, menu and numeric parameters, country-specific NCU/TYPE data, Genesis/UHQ image processing, and printer service functions. It also covers controlled data initialization, ROM version and checksum display, system-data and system-dump reports, communication histories, and error-report output. The special-tool table specifies FLOIL G311S (TKC-0953), FLOIL KG-107A (QY9-0057), MOLYKOTE PG-641 (CK-0562), and MOLYKOTE EMD-110 (HY9-0023).

The manual warns against loosening the red paper-spacing and paper-feed-motor screws because their adjustment is difficult to recover in the field, and it describes how grease, scratches, or excessive spring tension can compromise the carriage encoder film and cause position-reading faults. Before SPCNT-board replacement or a ROM upgrade that changes stored data, the publication calls for preserving needed reports because the required initialization can erase image memory, user settings, and service data.

Scope and Safety

The disassembly chapter is intentionally limited to assemblies expected to need replacement more often and directs the reader to the separate Parts Catalog for general disassembly and assembly. This PDF is not a complete parts catalog or a complete set of exploded-parts breakdowns. Detailed descriptions for the full SSSW/parameter set and remedies for non-model-specific fax error codes require the separate G3 Facsimile Service Data Handbook and G3/G4 Facsimile Error Code List. Expanded user operations and user-report samples are covered by the separate User's Guide.

Disconnect AC power, the telephone line, and computer cables before disassembly. Work involving the power-supply primary, telephone-line primary, conductive ink, hot components, moving mechanisms, or powered diagnosis requires the grounding, ESD, and workshop precautions specified in the manual.