Canon IR C3100 Series (C2570 and C3170) 2005 Service Manual (P/N DU7-3113-000)

• Canon-issued OEM service manual dated July 19, 2005 — a 1,050-page English-language PDF. Covers the iR C3100 and iR C3100N, with model-marked sections for the iR C2570, iR C3170, iR C2570i, and iR C3170i.
• Traces the main controller, DC controller, reader controller, SRAM/HDD, expansion, UFR, Ethernet, power-supply, and high-voltage PCB systems, including startup logic and image-data paths for copy, Box, SEND, fax, and PDL functions.
• Details factory repair procedures for the CIS/reader, laser scanner, drum and developing rotary, intermediate transfer belt, transfer rollers, fixing unit, pickup, registration, and duplex systems, with removal, replacement, inspection, and post-repair checks.
• Covers installation and commissioning work such as drum and developing-unit installation, toner setup, developer and drum initialization, automatic gradation correction, image-position adjustment, cassette setup, and final image/operation checks.
• Organizes fault isolation through service-mode DISPLAY, I/O, ADJUST, FUNCTION, OPTION, TEST, and COUNTER data, plus image-fault diagnosis, detailed E-codes, SEND codes, and printer, finisher, and ADF jam codes.
• Provides PING, loopback, local-host, and remote-host network checks, along with SST/USB software upgrades, HDD formatting, backup-data transfer, and model-specific firmware procedures.
• Uses factory system-configuration drawings, machine cross sections, PCB block diagrams, functional data-flow diagrams, paper-path views, test-print charts, and component-location tables throughout the manual.

Machine Architecture and Model-Specific Coverage

The manual explains how electrical and mechanical systems interact through each operating sequence, from power-on and scanner input to controller processing, image formation, transfer, fixing, and delivery. Separate controller and HDD sections distinguish the iR C3100/C3100N architecture from the iR C2570/C3170 family, including model-specific E602 diagnosis and main-controller I/O references.

Configuration pages map the DADF-L1, Side Paper Deck-Q1, 2-Cassette Pedestal-Y1, Inner 2-Way Tray-C1, Finisher-P1, Finisher-Q1, and Saddle Finisher-Q2. Separate print/transmission layouts identify the boards, memory, fax, SEND, PDF, security, and printer options used by the different model groups. Product-reference tables cover supported media, output rates, image margins, operating environment, power/noise, dimensions, and option-dependent functions.

Representative references include Delivery Accessories System Configuration, Connections Among Major PCBs, Flow of Image Data for SEND Functions, paper-path layouts for the Finisher-P1 and Finisher-Q1/Saddle Finisher-Q2, and the 16-Gradation and Grid test-print charts.

Factory Repair, Adjustment, and Fault Isolation

Component service reaches board, sensor, motor, roller, heater, clutch, and drive-unit level. The replacement chapters cover access and removal, while Standards and Adjustments documents the required follow-up after replacing the CIS, reader controller, laser scanner, drum, developing units, intermediate transfer components, fixing parts, HDD, HVT PCB, pickup cassette, or duplex unit. Image-position standards, horizontal registration, paper-width registration, fixing nip adjustment, and related service-mode data are included. Maintenance data separates periodically replaced parts, durables and consumables, scheduled service, and cleaning points.

Troubleshooting moves from site, media, consumable, and functional-block checks into test patterns and symptom-based diagnosis. It covers density and color faults, fogging, streaks, poor fixing, scaling errors, skew, feed damage, no-power conditions, controller faults, network startup, and SEND/fax problems. Error-code tables pair codes and subcodes with detection logic and countermeasures. A field case also identifies an early Finisher-Q1/Saddle Finisher-Q2 serial break for staple-batch misalignment.

The Service Tools chapter identifies Canon references such as the FY9-2002 digital multimeter, FY9-3038/FY9-3039 tester extension pins, and FY9-9030 CA1 test sheet, followed by specified solvent, grease, and lubricant applications.

Installation, Network, and Software Service

Installation coverage includes site planning, unpacking, pedestal positioning, fixing-material removal, machine leveling, grounding and cable checks, accessory setup, and initial service-mode records. Network commissioning separates connection tests, address-based checks, loopback/local-host testing, and fault isolation.

Software service covers Service Support Tool and USB connections, full or selected HDD partition formatting, system and language-module downloads, DCON/RCON and fax firmware work, and backup-data upload/download.

Scope and Service Notes

This PDF is the main-machine service manual. It includes DADF and finisher configuration, codes, and selected fault cases, but directs technicians to the separate DADF-L1 service manual for the feeder’s full height, read-position, magnification, registration, and white-level adjustment set. The laser scanner can be replaced, but the laser unit itself is not field-adjustable.

Two repair traps are called out clearly. Leaving the ITB released and slack can deform the belt, and inserting the drum unit at an angle can damage the photosensitive drum against internal components. Improper developer-shutter seating can prevent toner-cartridge installation, cause toner leakage, and damage the black developer’s toner-feed components.

Service safety: Follow the documented shutdown procedure before disconnecting power so HDD data is protected. Isolate the machine before electrical repair, allow the fixing system to cool, and observe the manual’s laser and high-voltage precautions.