Konica Minolta Bizhub 501/421/361 Service Manual (P/N CCA0R5-M-FE2-0650)

• Covers the Konica Minolta bizhub 501, 421, and 361 main body, with dedicated field-service sections for the DF-613, PC-206, PC-407, LU-203, FS-522/PU-501/OT-602, FS-523/RU-507, SD-507, MT-502, JS-502, IC-207, and i-Option LK-101/102/103.
• Details main-engine repair work for the write unit, drum and drum unit, transfer/separation corona, developing unit and developer, toner-supply and cleaning sections, tray and bypass feed systems, registration assembly, and fusing unit.
• Provides separate periodic-maintenance, parts-life, and fixed-parts counter references for the bizhub 501/421 and bizhub 361, along with service-mode counter resets, PM checks, service materials, jigs, and factory test charts.
• Adds factory adjustment coverage for print and scan positioning, resist-loop and paper-feed setup, TCR and toner-density calibration, laser adjustments, ADF calibration, SD-507 staple/fold setup, PU-501 punch alignment, and tray mis-centering.
• Includes jam and malfunction-code tables, Sensor Check and Load Check functions, test patterns, parts and connector layouts, timing charts, and overall wiring diagrams for the main body and supported options.
• Explains ISW, USB ISW, and Internet ISW, firmware compatibility and checksum checks, IC-207 update coverage, and LK-series license activation, deactivation, repair, initialization, and error recovery.

Service and Maintenance Overview

This is the Konica Minolta factory Field Service manual, cover-dated March 2009, Ver. 2.0. The main-body revision table records the May 2008 first edition, the March 2009 addition of the LK option, and later description updates through Ver. 2.04.

764-page PDF breakdown: front matter, 27 pages; main body, 468 pages; DF-613, 30 pages; PC-206, 20 pages; PC-407, 26 pages; LU-203, 28 pages; FS-522/PU-501/OT-602, 26 pages; FS-523/RU-507, 40 pages; SD-507, 34 pages; MT-502, 10 pages; JS-502, 8 pages; IC-207, 18 pages; and LK-101/102/103, 29 pages.

Main-body coverage goes far beyond scheduled cleaning. The repair chapters cover removal, replacement, and follow-up adjustment of the write unit, drum, transfer/separation corona, developer system, cleaning and toner-recycle sections, paper feed, registration, scanner, and fusing assembly. Fusing work reaches the web, claws, driven and pressure rollers, heater lamps, bearings, thermistors, thermostat, and input gear; scanner work includes the CCD, exposure lamp and unit, scanner-wire setup, and optic-unit positioning.

Separate parts-life and PM tables distinguish the 501/421 from the 361. The service-tool pages identify the 26NA2134 drum rotation member, 26NAJG01 optic unit positioning jig, 4040PJP1/P2/P3 test charts, DF adjustment and white charts, and an SD stapler positioning jig. These references matter because several repairs require a jig, counter reset, or post-replacement calibration rather than a simple swap.

The developer section warns that the gear must be turned only in the specified direction, the splash-prevention sheet must remain clear of the roller, and TCR adjustment follows developer replacement. Drum and cleaning-blade work calls for correct setting-powder handling and counter reset; fusing procedures flag claws, lamps, thermistors, and harnesses that can contact or mark the rollers if mispositioned.

Option chapters add actual workshop depth. DF-613 coverage includes feed and separation rollers, scanning guides, and skew/height adjustment. Paper-feed and large-capacity units include roller, tray, wire, belt, and lift-plate work; finisher sections cover stapler and punch disassembly, solenoid and belt setup, tray-level checks, fold skew, and center-staple alignment. IC-207 adds board service, firmware linkage, printing-system troubleshooting, and data capture.

Specification and Setup Data

Service-mode coverage includes print and scan registration, bypass and resist-loop adjustment, imaging-process controls, TCR and toner density, laser settings, parts-life and PM counters, Sensor Check, Load Check, adjustment-data backup and recovery, memory and HDD tests, ADF and finisher calibration, CS Remote Care, DipSW settings, Test Mode, enhanced security, billing, and license management. Jam and malfunction tables identify causes, machine behavior, release logic, and likely abnormal parts.

The appendix provides Main Body 1/4 through 4/4 overall wiring diagrams, separate DF and LU wiring, PC-206/PC-407 diagrams, FS-522/PU-501 and FS-523 diagrams, SD and MT diagrams, board connector layouts, parts-location drawings, and operating timing charts. Named examples include the main-body A4 copy timing chart, DF two-original timing chart, LU feed timing chart, FS-522 stapling/punch timing chart, and FS-523 no-sort timing chart.

Firmware chapters cover board-by-board ISW order, local USB folder and file requirements, Internet ISW network settings, error codes, and post-write version/checksum verification. The manual also makes two scope limits clear: FS-523 firmware is handled by EPROM replacement rather than normal ISW, and Internet ISW is unavailable when LK-101/102/103 is installed. The LK section itself centers on License Management System procedures—activation, deactivation, repair, initialization, request codes, and NVRAM/CF-card-related license errors—rather than serving as a standalone LK firmware-rewrite guide.

Before internal repair, disconnect the main body and every attached option from AC power and allow the fusing section to cool. Powered checks with covers removed expose live high-voltage areas and moving gears; write-unit work also carries laser-specific restrictions.