2010 Sharp MX-M550N/M550U, MX-M620N/M620U, MX-M700N/M700U Copier Service Manual (P/N 00ZMXM700/S1E)

This Sharp service manual, publication code 00ZMXM700/S1E, covers the 2010 MX-M550N/M550U, MX-M620N/M620U, and MX-M700N/M700U digital multifunctional systems. It provides detailed documentation of mechanical assemblies, electrical systems, and image-quality calibration.

• DSPF and scanner: Document-feeder disassembly, CCD/CIS servicing, scanner alignment, shading correction, and image focus and magnification adjustments.

• Image formation: OPC drum, main charger, toner supply, developing-unit and transfer-belt service, including developer replacement and process-control checks.

• Paper handling and fusing: Tray and bypass-feed repair, registration and duplex mechanisms, plus heat-roller, web-roller, and fusing-unit disassembly.

• Fault diagnosis: Simulation codes, sensor and load tests, self-diagnostic trouble codes, paper-jam histories, and maintenance-counter procedures.

• Electrical systems: Wiring charts, power-line charts, signal lists, connector identification, and removal procedures for control and power-supply PWBs.

• Controls and firmware: LCD operation-panel and touch-panel service, HDD checks, Flash ROM version-up instructions, and update-recovery flowcharts.

This manual is suited to copier service technicians familiar with high-voltage measurements, service simulations, and internal MFP repair.

Model Configurations and Service Scope

The option matrix distinguishes U copier models from N network-printer models and identifies the MX-NBX1 network expansion kit, AR-F15 finisher, and AR-F16 saddle-stitch finisher. Option-related coverage includes diagnostic tests, fault codes, and maintenance references.

Unpacking and installation are covered by a separate installation manual, which is not included in this PDF.

Scanner Alignment and Image Formation

Calibration procedures distinguish platen and DSPF front-face CCD scanning from rear-face CIS scanning. They address skew, image centering, image loss, density, gamma, and sharpness; density checks specify the UKOG-0162FCZZ test chart.

Developer service includes doctor-gap and roller-pole adjustment, toner-concentration initialization, and replacement of seals and the density sensor. The photoconductor and transfer sections cover the drum, cleaning blade, charger, transfer belt, and cleaning roller.

The scanner instructions warn that disturbing the CCD base's optical alignment can require replacement of the entire scanner unit. The developing-unit procedures also identify the risk of damaging the DV doctor or magnetic roller with a clearance gauge.

LSU removal is documented, but internal disassembly of the laser unit is expressly excluded from field service.

Paper-Path Diagnosis and Fuser Service

Paper-jam tables connect detection conditions with sensor names, timer triggers, and transport paths. Together with jam-history and sensor-state simulations, they help distinguish a feed failure from paper remaining at a downstream detector.

The external heat-roller fusing system is covered down to pressure rollers, heater lamps, thermistors, thermostats, and the web-cleaning assembly. Maintenance tables distinguish model-dependent service intervals and identify the checks and counter resets associated with parts replacement.

Servicing high-voltage print engines involves electrical and thermal hazards, requiring proper safety protocols and technical training before handling internal components.

Wiring, Control Boards, and ROM Updates

Electrical/mechanism relation diagrams accompany the component sections. Wiring references include the SCN unit chart, paper transport charts, PCU connector table, and power line chart; the Platen timing chart and DSPF duplex timing chart document scanning sequences.

Troubleshooting covers U1, U2, and LCC faults and their applicable cancellation simulations. Control-board service includes MFP controller, PCU, scanner-control, and power-supply PWB removal.

ROM version-up instructions cover USB memory, USB cable, and Ethernet transfers using File2PRN, with version-compatibility precautions and recovery procedures for an interrupted update.

Examples of Developer and Image-Scale Settings

These are two examples of the mechanical and image-adjustment specifications included in the manual.

The developing doctor gap is specified as 0.525 ± 0.03 mm at both ends and the center of the doctor. For platen-mode CCD image magnification, the specified check range is 100 ± 0.8% in the main scanning direction.

PDF Search, Bookmarks, and Page Contents

Navigation and diagram detail: The document has searchable text and embedded chapter bookmarks. Three Simulation subentries lack usable destinations within this PDF. Small connector and pin labels in dense wiring charts are best read at higher zoom.

The download is one printable English PDF with 412 pages. This total includes the original cover, two contents pages, and three closing pages with soldering, battery, and copyright information.