2001 Canon iR8500 Series Copier & Printer Service Manual – iR105i, iR105+, iR9070, iR85+, iR8070

Canon’s iR8500 Series Service Manual, dated April 5, 2005, covers the iR105i, iR105+, iR9070, iR85+, and iR8070. Coverage of the earlier iR8500 and iR105 is limited to the sections carrying those model tags.

• Scanner and laser exposure: CCD unit and scanning-lamp removal, scanner adjustments, laser-unit replacement requirements, and laser-power checks.

• Image formation: Photosensitive drum replacement, charging-wire stringing, developing-assembly service, and removal of drum-cleaning components.

• Paper handling: Deck and cassette pickup, registration, duplexing, and delivery mechanisms, with component removal procedures, jam detection, and pickup adjustments.

• Fixing system: Roller and heater removal, cleaning-belt service, nip-pressure checks, temperature control, and down-sequence operation.

• Controller and software: Main controller and power-supply PCBs, the control panel Inverter PCB, MEAP functions, HDD replacement, and Service Support Tool upgrade procedures.

• Electrical diagnosis: Wiring Diagram of the Major PCBs, DC controller input/output charts, error-code tables, and component-location drawings.

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

Scanner and Image Formation Service

This documentation maps external views and machine cross-sections to the original exposure, laser exposure, and image formation systems. Scanner procedures distinguish CCD and scanning-lamp variants; the iR8070 sections specify CCD auto-adjustment after CCD/AP unit or scanning-lamp replacement.

The process-unit sections cover primary charging, developing, transfer/separation charging, and drum cleaning. Primary charging-wire and grid-stringing instructions include positioning checks and tension data.

The photosensitive drum requires careful handling: the manual explains that improper light exposure or storage can reduce the sensitivity of its amorphous silicon surface.

Paper Handling, Fixing, and Accessories

Pickup/Feeding System coverage follows paper from the decks and cassettes through registration, duplexing, and delivery. Removal procedures are supported by sensor-location drawings, jam-detection logic, separation-roller pressure adjustments, and pickup-solenoid positioning information.

Fixing-system sections distinguish mechanical roller service from heater and thermistor control. Down-sequence operation and protective-function tables explain the system’s response to changes in fixing temperature.

Configuration drawings identify DADF and Finisher options. Accessory troubleshooting includes selected DADF-J1 document-position procedures and finisher/paper-folding jam cases. Chapter 15 also contains model-specific fault cases for the earlier iR7200 and iR85.

Controller, Network, and Fault Diagnosis

Electrical coverage includes the Connection Diagram of the Major PCBs and main controller connector assignments. The Scheduled Service Chart organizes maintenance work, while the Potential Control System Conversion Table supports image-quality adjustment.

Image-adjustment flowcharts distinguish scanner-side faults from printer-side faults by comparing copy images with internal test prints. This helps a technician select the relevant diagnostic path before replacing parts.

Installation sections address temperature/humidity zones, ventilation, atmospheric-pressure limits, and network verification using PING and loopback checks. The MEAP (Multifunctional Embedded Application Platform) chapter explains application counters and compatibility between MEAP content and system software.

HDD procedures cover startup and shutdown behavior, partition handling, and recovery using the Service Support Tool (SST). Interrupting main power during indicated HDD access can cause an E602 fault.

Special tools are identified by name and number, including laser power checker FY9-4008 and potential sensor tester electrode FY9-3041. High-voltage and laser work requires the isolation and handling precautions described in the manual.

A Preview of Fixing-Roller Nip Specifications

The fixing-system adjustment section supplies model-specific nip limits; these are a small selection of its service data.

With the upper and lower rollers fully heated, the center nip width is 9.0 ± 0.5 mm for the iR85+ and iR8070. For the iR105i/iR105+/iR9070, it is 9.0 ± 0.5 mm on 200 V models and 10.0 ± 0.5 mm on 208/230 V models.

For both groups, the difference between measurements at the specified paper-edge positions must be 0.5 mm or less.

Searchable Text, Bookmarks, and Printable Pages

Navigation and wiring detail: Searchable PDF text and embedded bookmarks provide access to the contents, all 19 chapters, and selected subsections. Small connector and pin labels on dense wiring pages require zooming.

A single printable 1,122-page PDF. That total includes 44 blank pages, 30 cover/introductory/contents pages, and two closing pages.