2006 Konica Minolta bizhub PRO 920 Copier Field Service Manual Set

This Konica Minolta bizhub PRO 920 Field Service Manual Set combines the main-body manual with nine accessory service manuals in one PDF. The main-body edition is Ver. 3.0, May 2006, with later revision entries. The document code printed on the back cover is CC57GAPE2-0740.

• Imaging and toner: Drum, charge unit, transfer/separation unit, developer, and cleaning/toner recycle maintenance, with component removal and replacement procedures.

• Paper transport: Feed rollers, clutches, bypass tray, and ADU service, plus paper centering, skew, feed-height, and separation-pressure adjustments.

• Fusing and scanning: Heater lamp, roller, thermistor, and thermostat replacement; CCD and exposure-unit removal, scanner-wire installation, and fusing-unit rank setting.

• Fault diagnosis: Jam codes, malfunction codes, sensor and motor checks, test-pattern output, and Tech. Rep. mode adjustments.

• Finishing equipment: Stapler and lift-wire replacement, punch-unit service, folding adjustments, trimmer blade replacement, and waste-toner recycle components.

• Controller and firmware: IC-203 board, hard-drive, and memory service; HyperTerminal diagnostics, machine-setting data transfer, and ISW firmware update procedures.

• Electrical references: Parts layout drawings, connector layout drawings, timing charts, and overall wiring diagrams for the main body and accessories.

Konica Minolta recommends this service work for its trained service technicians. The procedures involve high-voltage assemblies, hot fusing components, and powered mechanisms.

Imaging, Toner, and Fusing Repairs

The main-body manual details periodic checks and replacement work for the photo conductor, charge wires, transfer/separation assemblies, and toner recycling system. Developing-unit coverage includes developer replacement, cleaning, and unit replacement; factory-set regulation-blade, scattering-prevention-plate, and magnet-angle settings are specifically excluded from disassembly.

The drum section warns that forcing the fixing coupling during installation can damage its groove and prevent later removal. It also links an unreset photo conductor counter after drum replacement to possible image fogging and toner splash.

Fusing coverage extends to heater lamps, upper and lower rollers, cleaning-web components, thermistors, and thermostats. Sensor-positioning jigs are identified by part number, including 55VAJG011 and 55VAJG021, while a separate procedure addresses rank settings after fusing-unit replacement.

Paper Handling and Finisher Configurations

The DF-606 and LU-403/404 manuals cover feeder maintenance and roller replacement, with lift-wire replacement procedures for the LU trays. ADU procedures address registration, reversing, conveyance, and exit components within the main body.

Finisher procedures distinguish the FS-509/516 flat-stapling units from the FS-604 stitch-and-fold unit. The latter has dedicated saddle-stitching, folding-pressure, and tri-fold-position adjustments. TU-501 trimming requires the FS-604 and MK-707 connection kit.

The PI-501 post inserter, PK-503/504/505 punch units, ZU-601/602 folding/punching units, and RC-501 toner recycle cut kit have their own service sections. The option-connection chart identifies permitted combinations and explains when PI-fed sheets can be punched.

Fault Tracing, Controller Tests, and Firmware

Jam tables connect paper-path faults to specific sensors and operating conditions. Malfunction tables identify likely abnormal components; used with connector layouts and timing charts, they help technicians distinguish a feed-drive problem from a missing sensor response before selecting parts.

The IC-203 section covers startup diagnosis through HyperTerminal, memory testing, Service DOS, and controller component replacement. Firmware documentation explains local ISWTrns and Internet ISW methods, supported transfer modes, and related error messages.

Electrical references include the main-body power-supply wiring, DF connector layout, FS timing charts, PK-503/504 wiring, and TU overall wiring diagram. These complement the mechanical procedures when a fault involves connected accessories.

A Sample of Component-Life and Mounting Specifications

These examples show a small selection of the service data included in the manuals.

Drum and developer life is listed as 1,000,000 prints or 250 driving hours, whichever comes first. Driving time includes idling, so hours are not a universal conversion to print count.

For IC-203 hard-disk mounting, the specified screw torque is 0.4–0.5 N·m, with the supporting rubber correctly seated in the holder.

Text Search, Bookmarks, and PDF Contents

Search and diagram detail: Searchable text and embedded bookmarks cover the main-body and accessory sections. One main-body revision-history bookmark has no destination. Small connector and pin labels in the large-format wiring diagrams require zooming.

The download is one printable, English-language PDF totaling 956 pages. The ten service manuals account for 930 pages:

The remaining 26 pages comprise 25 pages of shared introductory material and one back cover. Section covers, revision histories, contents pages, and 27 blank pages are already included in the total.