Canon iPF750 / iPF755 Printer Service Manual (2010)

Canon’s iPF750 series Service Manual, iPF755 edition, dated January 4, 2010, covers printer operating theory, installation, maintenance, troubleshooting, and repair.

Searchable PDF, Bookmarks and Page Breakdown

Search and diagram navigation: Searchable text and embedded bookmarks provide access to all eight chapters. Small electrical-diagram labels are readable when enlarged. The print-mode section contains blank table areas labeled T-2-1 and T-2-2.

Supplied as a single printable PDF with 278 pages, including 227 chapter-numbered pages, 13 contents pages, eight chapter dividers, three preliminary information pages, three cover/end pages, and 24 blank separator pages.

Ink-System Repairs, Carriage Adjustments and Service Diagnostics

These selected service topics outline part of the coverage. Additional sections include e-Maintenance/imageWARE Remote configuration and communication checks.

• Ink-system repair: Illustrated removal and reassembly procedures cover the ink tank unit, ink tubes, purge unit, and waste-ink collection components.

• Carriage and paper handling: Removal and installation coverage includes drive motors, the carriage, cutter, and linear encoder, with component-specific handling precautions.

• Replacement adjustments: Procedures address optical-axis alignment, head-to-paper gap, feed-roller eccentricity, carriage-motor adjustment, and positioning of the head-management sensor.

• Service-mode testing: Diagnostic functions check nozzle discharge, sensor inputs, carriage movement, purge operation, memory, and electrical contact with the printhead.

• Electrical fault tracing: Connector drawings and pin-function tables accompany separate warning, error, and service-call references with detection conditions and corrective actions.

Intended for qualified service personnel responsible for diagnosing faults, replacing assemblies, and completing the associated adjustments.

Ink Passage, Paper Path and Print Control

The operating descriptions follow initialization, ink delivery, printing, and shutdown. Mechanical coverage separates the ink passage from the paper path so the operation of each system can be traced through its components.

Ink delivery and recovery: Subtanks, supply valves, air-passage valves, suction pumps, and the PF-04 printhead assembly are explained alongside the purge and capping mechanisms.

Media transport and sensing: Roll-media and cut-sheet handling coverage follows the feed mechanism, feed-roller sensors, platen suction, and cutter-position detection. Multi-sensor explanations include media-width and skew detection, head-height measurement, and remaining-roll barcode reading.

The Print Signal Sequence, Print Drive Timing, and Ink Passage diagrams illustrate data flow, firing timing, and ink routing. Power-on and power-off flowcharts place initialization, recovery, and capping within the operating sequence.

Component Replacement, Calibration and Handling Precautions

Adjustment planning: A replacement-to-adjustment chart identifies the setup work associated with changed components. This helps technicians plan the calibration tasks that accompany a repair, including carriage-motor adjustment after work on the carriage belt or linear encoder.

Carriage-unit and multi-sensor replacement procedures call for a new multi-sensor reference plate and subsequent calibration. The disassembly chapter provides illustrated, sequential procedures for major assemblies and directs readers to a separate parts catalog for other component disassembly.

Ink and board handling: Incorrect handling of filled tubes or valves can cause ink backflow and leakage; conductive ink can damage electrical components. Board-replacement instructions explain how printer settings and operating data are retained when servicing the main controller and maintenance-cartridge relay boards.

Transport and reinstallation: Procedures distinguish local relocation from moves requiring ink drainage. They also address preparation when electrical or firmware faults prevent normal printer operation.

Follow the manufacturer’s precautions for electrical isolation, moving parts, and ink handling. Electrical components remain energized while the printer is connected to AC power.

Connector Pinouts, Error Tables and Service Reports

The main-controller component layout and ASIC explanations describe electrical processing within the printer. The Power Supply Block Diagram and connector-location drawings for the main controller and carriage PCB link board locations to the electrical reference tables.

Pin tables specify signal names, input/output direction, and function for motor, sensor, valve, and power connections. Error references connect displayed messages and codes with detection conditions and corrective actions; service-call entries identify associated components and faults.

PRINT INF reports: Explanations cover warning, error, and jam histories, printhead replacement records, nozzle-condition information, and component-life counters. These records provide operating history to consider alongside current symptoms and service-mode results.

Maintenance References, Tools and Firmware

Reference material includes media sizes, interface specifications, operating noise, power consumption, cleaning-operation timings, and illustrated lubrication locations. Consumable-parts tables associate selected part numbers with life estimates, service counters, and warning states.

The service-tool section identifies the cover-switch tool, QY9-0103-000, and specified maintenance materials. Firmware coverage explains the imagePROGRAF Firmware Update Tool and L Printer Service Tool.

Example Multi-Sensor Diagnostic Readings

For media-edge detection using diffuse reflection, the manual lists gain readings of about 10–35 for plain paper and about 8–25 for glossy paper when the multi sensor and media are normal. The corresponding media-output reading is about 500–600.

These service-mode examples accompany checks for sensor deterioration, media compatibility, and external light, providing conditions against which displayed readings can be assessed.