Xerox Phaser 8860/8860MFP Service Manual (P/N 705P01205)

• Covers the Xerox Phaser 8860 printer and 8860MFP, identified by product codes HAV and HBB, in a 316-page PDF of service document 705P01205, September 2007 Initial Issue.
• Four-color CMYK solid-ink engine repair covers removal and replacement of the Printhead, Drum Assembly, Transfix Roller and Load Module, and Purge Pressure Pump.
• Media Drive and paper-path troubleshooting covers standard Trays 1 and 2 and optional Trays 3 and 4, with pick and retard roller replacement and tray lift and pick mechanism tests.
• Factory adjustments include Printhead Parking, Wiper Blade Alignment, Process Drive Alignment, and Head Tilt Gear and Printhead Homing.
• 8860MFP-specific repair covers Scanner Assembly and Duplex Automatic Document Feeder (DADF) replacement, plus DADF-to-scanner calibration for duplex scan alignment and gray-level matching.
• Startup diagnostics explain Built-In Self Tests (BIST), Power On Self Tests (POST), Print Engine Self Tests (PEST), and LED blink patterns. Fault-code procedures address heater, ink-loader, drive, and scanner failures.

Component and Diagnostics Documentation

Illustrated parts lists separate model-specific covers, paper paths, drive assemblies, and electrical components. They also distinguish PagePack metered and non-metered ink loaders, so the parts coverage reflects the machine’s ink-supply configuration.

Mechanical repair extends to the Preheater and Deskew Assembly, Stripper Carriage, and Drum Maintenance Pivot Plate. The Process Drive procedure warns that using mounting screws to pull the drive into alignment can damage the chassis mounting bosses.

The internal Electronics Module differs between models. Its service approach is assembly replacement rather than component-level circuit-board repair, with instructions covering transfer of the Configuration Card, NVRAM, RAM, and hard drive or flash disk.

Separate procedures cover the Wave Amplifier and I/O Board. MFP sections add the Scanner Power Supply, Exit Module Control Board, elevator motor, and optional Foreign Device Interface (FDI) board. Improper ribbon-cable seating can damage the Wave Amplifier.

Image Quality and Fault Isolation

Image quality diagnostics distinguish print-engine defects from problems introduced by the platen scanner or DADF. Symptom-specific procedures address weak or missing jets, light stripes, smears, ghosting, color mismatch, and poor ink adhesion. Coverage also explains Jet Substitution Mode and provides a Printhead Troubleshooting Checklist for replacement decisions.

The Head to Drum Check and Skew and Margin Measurement test prints provide references for evaluating spacing and registration problems. Y-axis diagnostics address the drum encoder, drive-belt slippage, and belt tension.

Service call procedures use the Service Usage Profile and fault and jam histories, with separate Jam Code Keys for the two models. The system menu map and Hidden Service Menu support sensor monitoring and motor, clutch, and heater testing. The Mechanical Engine Initialization diagram supports startup fault tracing.

Ethernet and USB port verification, serial back-channel tracing, and fax protocol and transmission reports cover communications faults.

Wiring Diagrams and Connector Locations

Wiring data pairs plug/jack location maps with wire routing and circuit diagrams. Electronics Module Power shows heater and supply connections; Right Side Harness / I/O Control covers drive and encoder circuits. The 8860MFP Scanner/DADF Block Diagram traces scan-system interfaces to the image-processing electronics.

Specification and Maintenance Data

Technical data covers fastener torque specifications, electrical supply and logic levels, model-specific power consumption, environmental limits, and image skew and margin tolerances. Check Menu tables explain test parameters and result interpretation, but many nominal-value fields are marked N/A in this initial issue.

Routine maintenance schedules cover the Drum Maintenance Kit, waste tray, pick rollers, and DADF separator pad. Cleaning procedures address feed components, jam sensors, and scanner glass. The service-tool list identifies required torque screwdriver P/N 003082700; scanner calibration requires a dedicated calibration page.

Before initiating any live voltage testing or mechanical disassembly, refer to the manual’s electrical-isolation, capacitor-discharge, and hot-printhead precautions. Internal service is intended for product-trained personnel.