Canon iR2270/2870/3570/4570 Factory Service Manual – 2004

Canon factory service manual dated October 8, 2004, for the iR2270, iR2870, iR3570, and iR4570 series, with locality- and power-version differences identified throughout.

Searchable PDF, Chapter Bookmarks, and Page Breakdown

Search and diagram detail: PDF text search is available, with embedded bookmarks for the contents and all seventeen chapters. Zoom in to read small connector and pin labels in dense wiring diagrams.

One printable, English-language PDF contains 876 pages: 26 pages of front matter, 848 pages of chapter material including chapter dividers, one dated closing page, and one final blank page. Forty blank pages are already included in these totals.

Controller, Imaging, and Paper-Path Service

The selected coverage below highlights major service areas rather than reproducing the full contents. Other topics include LCD touch-panel adjustment and leakage-breaker inspection.

• Controller and reader repair: Main controller PCB, HDD, SDRAM, Boot ROM, reader controller, CIS, and scanner-motor replacement, with related setup requirements.

• Image formation: Laser scanner, drum, developing assembly, hopper, toner-feed system, transfer roller, and high-voltage PCB service.

• Paper handling: Pickup, registration, duplex, and delivery repairs involving cassette and manual-feed assemblies, rollers, clutches, solenoids, sensors, and drive assemblies.

• Fixing system: Step-by-step replacement procedures for the fixing unit, film, pressure roller, cleaning roller, and related sensors.

• Factory adjustments: Image-position, CIS, shading, laser, developing, drum/APVC, feeder-registration, and paper-width adjustments, including controller-replacement settings.

• Diagnostic references: Major PCB Wiring Diagram, service-mode I/O tables, image-fault troubleshooting, error and jam codes, and connector and power-supply data.

Written for qualified service personnel, this manual assumes the technical knowledge needed for copier diagnosis, internal repairs, and service-mode adjustments.

Controller Repairs and Calibration Records

The main-controller material explains HDD partitions, startup and shutdown, system software, and the image-data paths used for copy, Box, SEND, fax, and PDL printing before moving into board, memory, Boot ROM, and hard-drive replacement.

Post-replacement setup: The manual identifies the settings and components that must be preserved, transferred, or restored after controller and HDD work. P-PRINT records, service-label values, and Service Support Tool (SST) references connect hardware replacement with the calibration and software work required afterward.

This pairing helps technicians plan the complete repair instead of treating a replacement board or drive as the end of the job.

Interrupting main power during HDD access can cause an E602 fault, HDD damage, or data loss. The shutdown-flow diagram explains the protection sequence associated with drive access.

Imaging, Transport, and Fixing Mechanisms

The original-exposure section follows reader-motor operation, original-size detection, and shading controls. Laser and image-formation chapters explain APC, scanner-motor and shutter control, APVC/ATVC stabilization, charging, developing, toner supply, transfer, and drum cleaning.

Scanner and image-formation timing charts show how these operations relate. Paper-path drawings distinguish the base machine from configurations using a copy tray, 3 Way Unit-A1, Finisher-S1, Finisher-Q3, or Saddle Finisher-Q4.

The manual separates iR2270/iR2870 and iR3570/iR4570 construction where mechanisms differ, including duplex drives and main-drive components. The fixing chapter adds film-speed and temperature-control theory, paper-passage detection, protective functions, and fixing/delivery drive repair.

Installation and Accessory Coverage

Installation material covers initial drum and toner setup, APVC correction, image-position adjustment, and operational test prints. TCP/IP checks use remote-host, loopback, and local-host addresses; Card Reader-C1 and NE Controller-A1 installation are also covered.

Applying power during initial installation while the fixing-assembly release cover remains fitted can damage the fixing heater.

Accessory scope: System maps identify Finisher-Q3, Saddle Finisher-Q4, Finisher-S1, punch units, DADF-N1, Side Paper Deck-Q1, 2-Cassette Pedestal-Y2, heater kits, and print/fax/send/MEAP options, with configuration dependencies.

This is the core machine service manual, not a separate illustrated parts catalog. Accessory configuration maps and related fault references do not amount to full internal repair coverage for every option; several configurations refer to separate installation procedures.

Electrical Diagnosis and Scheduled Service

Electrical fault isolation follows the machine’s signal and power paths. Rated-output tables cover the printer, controller, accessory, and All-Night power-supply PCBs, supported by connector maps and references for variable resistors, LEDs, check pins, motors, fans, sensors, switches, lamps, and heaters.

Service-mode references explain DISPLAY, I/O, ADJUST, FUNCTION, OPTION, TEST, and COUNTER, including DC-CON, R-CON, FEEDER, and SORTER entries.

Fault tracing: Detailed E602 material distinguishes HDD and partition faults. SEND errors, printer/finisher/ADF jam codes, alarms, and finisher, puncher, and DADF faults are covered. Image-fault sections address uneven density, blank or streaked output, smudging, ghosting, no-power conditions, and abnormal noise.

Component-location references help connect those symptoms with the responsible sensor, load, PCB, or mechanical path.

Scheduled-service material identifies periodically replaced parts, durables, consumables, cleaning points, inspection criteria, oils, solvents, and lubricants. Specified tools include Digital Multimeter FY9-2002, Cover Switch TKN-0093, Tester Extension Pins FY9-3038 and FY9-3039, and NA-3 Test Chart FY9-9196.

Board and drive work requires the specified shutdown and power isolation. The laser unit is not intended for field adjustment.

Selected Drum-Speed and Fixing Specifications

The drum-unit specifications distinguish the two engine groups: process speed is 137 mm/sec for the iR2270/iR2870 and 230 mm/sec for the iR3570/iR4570.

For all four models, the fixing-system table specifies a control temperature of 180°C at PSTBY. The accompanying material explains main-thermistor temperature detection, sub-thermistor protection, and fixing-film speed control.