Xerox WorkCentre 4150/4250/4260 Family Service & Repair Manual (P/N 708P89388)

• Covers the Xerox WorkCentre 4150, 4250, and 4260, including base, s, x, and xf configurations, in a 484-page PDF of Xerox’s April 2009 service manual, document 708P89388.
• Factory repair procedures address main-drive removal, power-supply and HVPS replacement, and model-specific fuser component repairs.
• Duplex Automatic Document Feeder (DADF) service covers feed-roll replacement, pickup and registration clutches, document-path sensors, and scan and duplex motors.
• Scanner and LSU replacement is covered alongside shading adjustment, DADF side-edge registration, and print lead- and side-edge registration.
• Finisher repair covers joggers, support fingers, ejector and stacker drives, plus jogger-belt adjustment.
• Repair Analysis Procedures (RAPs) connect fault codes to component checks, model-specific wiring diagrams, and printed wiring board (PWB) connector locations.

Fault Codes and Image Quality Diagnostics

You get direct access to status indicator diagnostics, image quality troubleshooting, and component location guides. The fault-finding sections distinguish boot failures, memory and hard-disk faults, cartridge communication errors, and fuser heating faults. dC330 Component Control documents sensor-state checks and controlled tests of motors, clutches, and solenoids.

Image-quality repair covers blank or black output, banding, background, ghosting, and poor fusing. The Periodic Printing Defects Check relates repeating marks to specific rollers. S600 Pattern and Ghosting Pattern descriptions identify the internal prints used to assess density defects, image repetition, and fuser offset.

Fax coverage includes coded faults, failures without a code, and protocol-report interpretation. Network and scan-to-email sections provide limited service actions and refer some authentication setup to the separate System Administration Guide.

Component Repair and Controller Service

Paper-path procedures cover tray feed assemblies, bypass feed and retard components, registration rolls, and the duplex gate. Fuser disassembly includes heat-roller and bearing work, plus heat-lamp assembly replacement on the 4250/4260.

The tool list identifies slim Phillips screwdriver 600T02299, referenced for restricted LSU screw access. Repair cautions flag the exit-sensor actuator, which can be damaged during fuser reinstallation, and the thin clutch leads that can break during main-drive removal.

Controller repair covers main PWB replacement, dC131 NVM Read/Write, and NVM initialization. Local firmware-upgrade methods differ: ControlCentre over USB from a Windows 2000/XP PC for the 4150, versus a USB thumbdrive for the 4250/4260. The hard-disk formatting routine applies only to the latter pair and documents the loss of stored jobs, scan templates, and address books.

Specification and Component Data

The guide breaks down memory, interface, and storage specifications. Its configuration table assigns the 40 GB hard disk to the 4150 and the 80 GB drive to the 4250/4260. High-capacity feeder (HCF) coverage applies to the later family; the configuration chart also identifies standard versus optional fax, network printing, scan-to-email, and finishing equipment.

Component life tables separate reference design life from High Frequency Service Item (HFSI) replacement guidance. They cover the xerographic module, fuser, transfer roll, and feed components, with different entries for the two hardware families. Counter-reset and threshold-setting procedures support maintenance tracking; actual component life varies with use and operating conditions.

Electrical references include HVPS output data and fuser operating-temperature tables. Illustrated parts lists distinguish model-specific assemblies and metered/PagePack versus sold toner-cartridge versions. Foreign Device Interface installation and checkout procedures cover the optional accounting connection.

Wiring Diagrams and Connector Locations

The 32 wiring diagrams include Input Power and Power Distribution (4150, WD 1), DADF (4250/4260, WD 29), and the 4250-specific LSU circuit (WD 32). Finisher, extra-tray, HCF, and network interface card connections are covered as well. PWB connector-location views and test-point references support fault tracing between assemblies.

Working with high-voltage internal components and laser optics carries inherent risks. Standard electrical safety protocols and proper technical training are essential before removing chassis panels; hot-fuser precautions also apply. Xerox specifies this documentation for certified, product-trained service personnel.