2007 Canon iPF710 Service Manual (P/N DU7-1244-000)

• Canon-issued imagePROGRAF iPF710 service manual — document no. DU7-1244-000, October 2007, Rev. 0; a 238-page PDF for the 36-inch desktop large-format printer.
• Explains the print engine and ink system from the ink tank unit and tube path through the carriage, PF-03 printhead, purge unit, and maintenance cartridge, together with mist airflow, media feed, roll rewind, platen suction, and cutter operation.
• Covers major repair access and component replacement for the exterior covers and waste-ink box; drive, ink tube, carriage/head-holder, and feeder assemblies; purge and ink tank units; head management sensor and multi sensor; and the main controller, power supply, and relay PCBs.
• Details required post-repair setup including feed-roller eccentricity tuning, multi sensor gap calibration and optical-axis correction, head management sensor position adjustment, printhead registration, old/new feed-roller type selection, cutter replacement mode, and PCB data transfer.
• Maps electrical diagnosis at connector and pin level for the main controller, carriage relay, and head relay PCBs, with sensor and motor functions, firmware-update coverage, and service-mode I/O status displays.
• Provides named diagrams and diagnostic references including the Printer Diagram, Print Signal Sequence, Ink Passage schematic, Paper Path schematic, Power Supply block diagram, four-part General Circuit Diagram, warning/error/service-call tables, and service-mode test patterns.

System Overview and Functional Specifications

Written for qualified service personnel, this manual combines Canon’s theory of operation with installation, maintenance, troubleshooting, and repair information for the iPF710. The technical reference follows print data from USB, Ethernet, or the optional IEEE1394 interface through the main controller ASICs and memory to the carriage relay and head relay PCBs. It explains print-drive timing, nozzle selection, head-temperature control, automatic nozzle checking and backup, capping, wiping, suction, ink filling, and pigment-ink agitation.

The mechanical sections trace ink flow from the tanks and sub-buffers through the supply valves and tube assembly to the printhead and waste-ink collection points. Separate coverage explains carriage drive and height control, multi sensor functions, roll and cut-sheet feeding, feed-roller encoding and eccentricity correction, roll-media rewind, cutter operation, and the fans used for platen suction and ink-mist collection. Specification tables cover supported media paths, media-specific print modes, borderless-printing limits, interface requirements, main controller memory and firmware architecture, and the 15–30 °C operating and print-quality environment.

Repair, Calibration, and Diagnostic Coverage

The disassembly/reassembly chapter starts with a major-component flow diagram and then documents access to the assemblies listed above. It also covers automatic and manual ink drainage, manual cap release and wiper-unit movement, ink-supply valve operation, approved grease locations, and printer transport and reinstallation. Required follow-up work is tied to the affected parts: LF TUNING and LF TUNING2 after feed-roller or encoder replacement, GAP CALIB and OPTICAL AXIS after carriage or multi sensor replacement or removal, NOZZLE CHK POS after head management sensor service, and the dedicated PCB replacement mode used to transfer stored settings and counter data.

Service mode provides current switch and sensor states, warning and error histories, printhead and ink information, nozzle and solid-fill test patterns, head-adjustment patterns, and counters for printer life, carriage travel, purge cleaning, ink use, media use, cutter cycles, and monitored service parts. The maintenance chapter also ties selected service-part numbers to parts-counter states for waste-ink, carriage, tube, purge, sensor, motor, and fan assemblies. Firmware coverage includes the GARO Firmware Update Tool and L Printer Service Tool over USB, network, or optional IEEE1394. The special-tool list identifies the Cover Switch Tool QY9-0103-000, MOLYKOTE PG-641 grease CK-0562-000, and PERMALUBE G-2 grease CK-0551-020.

Canon flags several repair traps that matter on this model. The main controller PCB and maintenance-cartridge relay PCB must not be replaced together because settings and counter data are transferred between them during board replacement. Red screws identify factory-set locations that are not to be disturbed. The carriage must also remain level during removal so its protective Mylar sheets stay in place; if they come off, the carriage rollers can contact one another and degrade print quality.

Electrical sections can remain live whenever AC power is connected, and leaked ink is conductive. Power isolation, ESD control, and ink-drain precautions are required before housing or ink-path repair; energized checks should be limited to the diagnostic conditions defined by the manual. Troubleshooting is centered on connector and pin assignments, service-mode data, firmware handling, and warning/error code identification rather than a symptom-by-symptom replacement matrix. The publication is not a full illustrated parts catalog, and its PCB coverage stays at the functional block, connector, and pin level rather than component-level board repair.