2010 Canon IPF 750 / IPF755 Service Manual (P/N 0023–1254)

• 278-page PDF of Canon’s iPF750 series Service Manual, iPF755 edition, dated January 4, 2010.
• Ink-system repair procedures cover removal and reassembly of the ink tank, ink tube, purge and waste-ink collection units.
• Carriage, drive-motor, cutter and linear-encoder service includes illustrated removal, installation and handling precautions.
• Post-replacement adjustments address optical-axis alignment, head-to-paper gap, feed-roller eccentricity and head-management sensor position.
• Service-mode checks cover nozzle discharge, sensor states, carriage and purge operation, memory and printhead contacts.
• Electrical troubleshooting combines connector-location drawings and pin-function tables with separate warning, error and service-call tables.

Written for qualified service personnel, this manual covers the technical theory, installation, maintenance and repair of the printer.

Printer Mechanical and Electrical System Walkthrough

This technical reference details the operation sequences of the machine. It covers start-up initialization, ink supply systems, and power-off routines. The manual divides the mechanical system into two primary areas: the ink passage and the paper path.

The ink passage section explains the subtanks, supply and air-passage valves, suction pumps, and the PF-04 printhead assembly. Paper-path coverage follows roll media and cut sheets through the feed system, with feed-roller sensors, platen suction and cutter-position detection. It also explains how the multi sensor handles media-width and skew detection, head-height measurement and remaining-roll barcode reading.

The Print Signal Sequence, Print Drive Timing and Ink Passage diagrams connect the operating descriptions to data flow, mechanical timing and ink routing. Separate power-on and power-off flowcharts show where initialization, recovery and capping fit into normal operation.

Disassembly, Replacement and Repair Precautions

The adjustment chart links replaced components to the required setup work. Carriage-motor adjustment also applies to work involving the carriage belt or linear encoder. The replacement procedures specify a new multi-sensor reference plate and subsequent calibration when changing either the carriage unit or the multi sensor.

Incorrect handling of ink-filled tubes and valves can cause backflow and leakage; conductive ink can damage electrical components. The board-replacement section explains the sequence needed to preserve printer settings and operating data when replacing the main controller and maintenance-cartridge relay boards.

Transport and reinstallation coverage distinguishes local moves from moves requiring ink drainage, including preparation when an electrical or firmware fault prevents normal operation. The disassembly chapter covers major assemblies and refers to a separate parts catalog for other component disassembly.

Specification Highlights and Component Data

The manual maps out the main controller board component layout and explains ASIC data processing. The Power Supply Block Diagram and main-controller and carriage-PCB connector drawings support electrical fault tracing. Pin tables identify signal names, input/output direction and function for motors, sensors, valves and power connections.

For repair diagnosis, PRINT INF report explanations cover warning, error and jam histories, printhead replacement history, nozzle-condition data and component-life counters. The error tables relate displayed messages and codes to detection conditions and corrective actions, while the service-call table identifies the components associated with more serious faults.

Reference tables cover media sizes, interface specifications, operating noise, power consumption, cleaning-operation timings and lubrication locations. Consumable-parts data links selected part numbers to life estimates, service counters and warning states. The service-tool list identifies the cover-switch tool, QY9-0103-000, and specified maintenance materials. Firmware sections describe the imagePROGRAF Firmware Update Tool and L Printer Service Tool.

Observe the manufacturer’s electrical-isolation, moving-part and ink-handling precautions during service; the manual warns that electrical components remain energized while the printer is connected to AC power.