2001 Canon BJ-W9000 Large Format Printer Service Manual (P/N QY8-1373-000)

The Canon BJ-W9000 Service Manual, QY8-1373-000, Revision 0 (February 2001), covers technical theory, installation, maintenance, and repair for this high-speed, large-format bubble jet printer. Canon wrote it for qualified service personnel.

This 455-page PDF contains 419 pages of printer service documentation, a 35-page TU-01 take-up unit service manual, and one closing back cover.

• Ink-system work covers carriage, sub-tank, purge, ink bottle, and waste ink tank removal and reassembly precautions, with automatic and manual ink-drain procedures.
• Paper-path repair includes roll media cassettes A/B, pressure rollers, the feed motor and feed roller assembly, cut sheet feed unit, and cutter installation details.
• Factory adjustments address roll-feed drive belt tension, wiper blade positioning, and nozzle-check auto position adjustment after component replacement.
• Service mode documents sensor and clutch I/O checks, operation-panel testing, nozzle test prints, component counters, and error-history review.
• Controller diagnosis is backed by the General Circuit Diagram, board schematics, and connector pinouts for the system, image process, head, carriage, mechanical, and motor controllers.
• The TU-01 section adds installation, cardboard tube holder service, and symptom-based troubleshooting for automatic and manual winding.

Document Structure & Technical Reference

Part 1 covers ink handling, electrical precautions, and the safe operation of moving assemblies. To ensure personal safety and prevent equipment damage, always review these precautions before performing any hands-on mechanical work.

Subsequent sections cover general specifications, SCSI-II (Fast SCSI) interface configurations, and installation environments. Setup extends to leveling, check-valve release, ink filling, transport preparation, and reinstallation. The interface section also explains the built-in SCSI termination, which cannot be disabled.

Part 4 functions as the core technical reference, detailing firmware logic, electrical component layouts, and sensor detection functions. The six-color dye-based, bidirectional print system uses four BC-1100 print heads, each with three nozzle arrays, and BCI-1101 ink bottles, including photocyan and photomagenta.

The ink-delivery sections explain how open and closed sub-tanks work with carriage air buffers, supply and suction pumps, and A-C/C-S/A-H valve control. Waste ink monitoring covers both tank weight and conductive leak detection.

Named references include the Schematic Diagram of the Ink Passage (for one color) and Overview of Paper Path. The Power Supply Block Diagram and Covers/Cassettes Sensor Layout support supply-circuit and cover-interlock diagnosis.

Operational Data & Maintenance Diagnostics

Troubleshooting separates operator calls from warning, service-error, and firmware-error codes. Fault-isolation sections cover ink-circulation failures, valve-sensor errors, nozzle-check faults, carriage/feed motor overloads, and SCSI communication problems. Separate symptom charts address no-power, missing-color, and poor-output conditions that may not generate a display message.

The software sections document System Controller Version Up Software for firmware updates and counter-data backup and restoration during board replacement. CR/MT Controller Version Up Software and upgrade tool QY9-0114-000 are documented for carriage and motor controller firmware.

The troubleshooting utility monitors sensor states and sub-tank ink levels in real time. The PDF documents these utilities; software and firmware files are not included.

Repair Adjustments, Tools & Disassembly Limits

The Manual Print Position Adjustment Pattern supports alignment evaluation, while electrical troubleshooting includes motor-resistance and circuit-continuity checks. The tool list identifies dummy head QY9-0101-000 for wiper blade alignment and valve releasing tool QY9-0111-000 for the ink-bottle check valves.

Canon’s repair precautions explain how moving a capped carriage can damage the print heads, and how conductive ink on powered electrical assemblies can damage the circuitry.

Part 5 provides component-specific disassembly/reassembly procedures and precautions, but a separate Parts Catalog is required for complete disassembly and assembly. That catalog is not included in this PDF.

TU-01 Take-Up Unit Coverage

The appended manual covers cardboard tube holders for 2- and 3-inch cores, drive-ring and spring positioning, lubrication points, and the paper-sensor-controlled winding mechanism.

Separate fault trees distinguish FEED/FORWARD switch failure, loss of AUTO mode, and complete loss of winding. They include continuity and voltage checks, a circuit diagram, and a PCB component-location view. The TU-01 does not report error codes to the printer.