Canon imageRUNNER C3480/C3380/C3080/C2880/C2550 Service Manual (2008) (P/N DU7-1192-020)

Canon service manual P/N DU7-1192-020, Revision 2, April 2008, covers the Color iR / imageRUNNER C3480, C3380, C3080, C2880, and C2550 families, including the G- and i-series variants listed above. The cover also names C2550i; individual procedure headers identify the applicable models.

PDF Search, Bookmarks, and Diagram Detail

Search and circuit diagrams: PDF text search and embedded bookmarks provide access to the chapters and appendix. Small connector, pin, and signal labels in the large-format circuit diagrams require zooming.

One 774-page printable PDF contains 19 chapters and a 22-page timing-chart and circuit-diagram appendix. The total includes the cover, preliminary pages, 34 blank divider pages, and manufacturer back cover.

Image Systems, Paper Transport, and Service Diagnosis

The following selected coverage highlights outline the repair and diagnostic content. Other included topics include user-mode settings and approved servicing solvents and lubricants.

• Image formation: Drum and process-unit service, developing, primary and secondary transfer, waste-toner collection, and image-stabilization controls, with related replacement procedures.

• Paper handling: Cassette and manual-feed pickup, registration, duplexing, pre-fixing transport, delivery, jam detection, and replacement of rollers, clutches, motors, and sensors.

• Controller and electrical diagnosis: Main, reader, and DC controller systems; memory and HDD service; power supplies, high-voltage boards, driver circuits, and network checks.

• Service modes and calibration: DISPLAY, I/O, ADJUST, FUNCTION, OPTION, TEST, and COUNTER references, diagnostic test prints, fault codes, and post-replacement setup.

• Installation and software: Host-machine and accessory setup, automatic gradation correction, image-position adjustment, MEAP/RDS service tasks, SST downloads, and USB software upgrades.

• Fixing and maintenance: Step-by-step fixing-film and pressure-roller replacement procedures, temperature-control diagnosis, nip-width checks, scheduled servicing, and durable-component replacement guidance.

Canon wrote this manual for qualified service personnel learning the machine’s technical theory, installation, maintenance, and repair.

Reader, Laser, and Color-System Repair

Dedicated replacement sections cover the reader controller and CIS, scanner motor, laser scanner, process and drum units, ITB, and transfer-cleaning assemblies. The theory sections explain CIS gain, offset, and shading correction, main- and sub-scan synchronization, laser-power control, and high-voltage bias generation.

Image-stabilization coverage includes ATR, D-max, PASCAL, ARCDAT, ATVC, and color-displacement correction. Post-repair references identify the label data, initialization, and calibration associated with CIS, laser-scanner, secondary-transfer-roller, and controller replacement. These references connect component replacement with the setup needed to assess image quality afterward.

Process-unit handling: Closing the lower-right cover with the process unit partly withdrawn can let the secondary-transfer high-voltage contact scratch the ITB belt. Incorrect toner-refill or waste-toner shutter positioning can interrupt toner feed, scatter toner, or damage parts when the process-unit handle is turned.

ITB closure: Uneven closure can cause color displacement or light images; incorrect pressure on the cover or closure with the support arm engaged can damage the assembly.

Paper Transport and Fixing-System Service

The paper-handling chapters map drive routes, roller and sensor locations, feed-speed control, and delay or stationary jam detection. Replacement instructions extend to pickup units, separation components, the registration motor, manual-feed assemblies, and the duplex feed frame.

Paper-path drawings distinguish the copy tray, Finisher-Z1, and Finisher-Y1/Saddle Finisher-Y2 configurations. The fixing chapter explains temperature regulation, pressure/release control, protective functions, and fixing-system error codes alongside the component-replacement instructions.

Fault Isolation and Electrical References

Symptom-based guidance addresses blank or light output, fogging, uneven density, focus problems, streaks, ghosting, poor color reproduction, skew feed, pickup faults, control-panel problems, noise, network failures, and fax/transmission faults.

Diagnostic patterns include 16-gradation, full-page halftone, grid, MCYBk horizontal stripes, 64-gradation, and full-color 16-gradation test prints. Error, SEND, jam, and alarm-code references support fault tracing, while PING checks distinguish remote-host, loopback, and local-host network tests.

Electrical tables identify clutches, solenoids, motors, fans, sensors, switches, lamps, heaters, PCBs, connectors, variable resistors, LEDs, and check pins. Drawings include the main-body cross section, Connections Among Major PCBs, copier/Box/SEND/fax/PDL image-data flows, and printer/reader/option power-supply routes. The appendix adds reader and printer timing charts and General Circuit Diagrams A501–A516.

Controller Replacement and Software Recovery

Controller-box procedures cover its boards, SRAM, Boot ROM, SDRAM, and HDD. The replacement references distinguish data restoration, initialization, service-label entry, and test-print requirements for the affected components.

MEAP coverage includes application and license management, backup, HDD replacement, and recovery; RDS coverage addresses communication settings, tests, logs, and errors. Software work includes HDD formatting, backup-data upload/download, SST-based installation, and USB upgrades. SST procedures require a suitably equipped PC and the appropriate Canon system software.

The manual warns that interrupting HDD access or a software download/write operation can corrupt data or leave the machine unable to start.

Installation, Accessories, and Coverage Limits

Installation procedures address the scanner, drum units, toner retainers, cassettes, DADF, card reader, key switch, voice kits, wireless network adapter, inner tray, and serial interface.

Canon issued the manual for all sales localities, so some accessory and user-mode information is region-specific. Several finisher, puncher, and paper-deck entries refer to separate installation literature. This host-machine manual therefore does not provide full internal repair coverage for every accessory.

Specific Finisher-Z1 troubleshooting addresses stapler sensor-lever and controller-software faults, including the serial breaks listed above. Finisher software downloads call for the Canon Downloader PCB FY9-2034.

Maintenance Planning and Service Tools

Scheduled-service checklists cover image checks, glass cleaning, waste-toner collection, feed and transfer components, and leakage-breaker inspection. Durable-component tables provide replacement guidance and part references, with estimated service lives subject to operating conditions.

Canon’s tool list includes digital multimeter FY9-2002, cover switch TKN-0093, tester extension pins FY9-3038/FY9-3039, CA1 test sheet FY9-9030, D-10 test sheet FY9-9129, and loupe CK-0056.

Service precautions address electrical isolation, laser exposure, the heated fixing system, toner, the lithium battery, and heavy-machine handling.

Sample Image-Position Adjustment Standards

For cassette-fed copies, the installation section specifies a first-side horizontal image margin of 2.5 ± 1.5 mm. The corresponding second-side margin for duplex copies is 2.5 ± 2.0 mm.

Cassette 1 leading-edge image-margin checks specify 4.0 mm with a +1.5/−1.0 mm tolerance on both sides. These standards accompany the mechanical registration and service-mode adjustment procedures.