2001 Canon BJ-W9000 Service Manual
Maintenance, troubleshooting, and service procedures for the Canon BJ-W9000 large format printer—covers disassembly, ink supply, paper path systems, electrical components, and diagnostic flowcharts. Ref: QY8-1373-000
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Models Covered & Key Technical Specifications
Canon BJ-W9000 (QY8-1373-000) — 2001 Precision Engineering Reference | BJ-W9000 Series Repository.
- Verified Unit Dimensions: Maximum printing resolution reaches 1200 × 600 dpi establishes the horizontal/vertical addressability Bounds.
- Measured DPI Rating: For optimal photographic output, 1200 × 600 dpi yields the bi-directional print capability Topology.
- Prescribed Securement Values: Media width capacity specifies 610 mm to 1092 mm (24" to 43") as the supported roll dimension Matrix.
- Nominal Clearance Data: The operating temperature range is standardized to 5°C–35°C for environmental condition Standards.
- Defined Output Rating: Printing speed corresponds to 7 minutes (Fast), 14 minutes (Regular), and 29 minutes (Fine) per A0 sheet Margin.
- General Physical Specs: Maximum printer dimensions maintain 2010 mm width × 745 mm depth × 1280 mm height (including stand) Protocol.
Professional Workshop Service Manual & Technical Specifications
Technical Service Manual: Canon BJ-W9000 (2001) Library-Master
Engineering-Metrics: Canon BJ-W9000 (2001) // Serial-Range: Large-format printer control / ink circulation Logic // Asset-ID: Service documentation for field technician deployment.
| Specification | System Architecture | Documentation Scope |
|---|---|---|
| Print System | Four BJ print heads, six-color dye-ink configuration | Complete technical reference provided |
| Resolution Capability | 1200 x 600 dpi bi-directional printing | Performance parameters documented |
| Paper Feed Mechanism | Dual automatic cassettes plus manual cut-sheet input | Assembly and operational procedures included |
| Ink Management | Separate supply bottles with closed/open sub-tank architecture | Circulation pathways and valve operation detailed |
| Electrical Integration | System, image process, head, carriage, mech., and motor controllers | Connector positions and signal specifications included |
Engineering chapters address the printer's mechanical foundation alongside firmware operations, integrating power-on initialization with thermal protection protocols for the print head assembly. The document encompasses ink supply sequencing from bottle through sub-tank circulation to air buffer delivery, plus waste-ink collection through purge unit operations. Maintenance information covers the nozzle check sensor system, wiper blade assembly positioning, and belt tension verification procedures, while the carriage controller manages 1200dpi timing synchronization with linear encoder feedback during bidirectional printing mode.
Core Framework
The troubleshooting section provides comprehensive sensor detection functionality, addressing covers/cassettes, ink passage components, carriage position detection, and paper path monitoring across five distinct sensor categories. Testing procedures include panel check operations, LCD verification, and key responsiveness analysis via the service mode interface. The document references operator call error codes alongside warning/error/firmware error classifications, with error history retrieval through the counter information download function implemented via SCSI interface communication.
Operational Standard
Detection functionality covers twelve distinct sensor types monitoring ink supply status at three levels (full, medium, empty) within each colored sub-tank, pressure roller engagement state, and automatic jam recovery mechanisms that advance roll media 100mm before cutting during unexpected power loss scenarios. Paper path components integrate spindle rotation detection with cassette pick-up sensor feedback, skew detection via reflection-based measurement, and eject sensor timing to establish leading edge positioning over the platen surface prior to printing initiation.
Technical Sequences
Head management operations integrate nozzle ejection detection following printer power-on, with automatic cleaning initiated after 12-hour idle periods and mandatory operations after 72-hour standby conditions. The document specifies ink consumption rates during cleaning cycles, ranging from 0.5 grams for preventive nozzle array maintenance to 3.55 grams following complete head replacement procedures. Excessive temperature protection employs three protection levels that progressively escalate from carriage halt-and-wait protocols through forced suction cooling at the home position to immediate printing cancellation with mandatory five-minute temperature reduction before technician-initiated head replacement becomes permitted.
Strategic Benchmarks
The printer documents torque specifications for belt tension adjustment procedures to ensure proper carriage drive synchronization and paper feed roller engagement without mechanical stress on the drive motor assemblies. Dip switch configuration validation confirms factory default settings within the system controller following component replacement, while the nozzle check position auto-adjustment protocol establishes optimal sensor detection alignment following carriage unit or purge unit service operations.
Strategic Methodology
Circuit diagrams provide complete electrical schematics for the system controller incorporating 2Mbyte DRAM work storage, 32Kbyte backup SRAM with lithium battery retention, and FLASH ROM printer control program implementation. The image process controller architecture integrates four specialized GA units performing real-time RGB-to-YMCK color conversion with gamma correction and binarization for six-color output generation, while the motor controller manages bidirectional DC brushless carriage motor operation and DC servo feed motor feedback control through encoder counter integration and servo PWM modulation circuitry.
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