2007 EPSON Stylus Photo RX680/RX685/RX690 Printer Service Manual (P/N SEMF07008)

This factory service manual covers the 2007 EPSON Stylus Photo RX680, RX685, and RX690 color inkjet printer family. Manual code SEMF07008, Revision B (September 28, 2007) includes the Chapter 5 correction to the BRS/PFP overview.

Search, navigation, and circuit detail: The service text and parts lists support PDF text search, with embedded bookmarks for the chapters and appendix sections. Small circuit-diagram labels require zooming and are not searchable.

• Printhead and ink system: Printhead and CSIC assembly removal, pump and cap troubleshooting, waste ink pad replacement, and associated service adjustments.

• Paper feed and duplexing: Front and rear ASF fault isolation, roller and encoder service, APG mechanism operation, and automatic duplex-unit troubleshooting.

• Scanner repair: CIS unit and carriage disassembly, motor and encoder checks, spacer selection, and scanner original adjustment.

• Electrical diagnosis: Motor resistance and sensor checks, USB and memory-card troubleshooting, connector pin assignments, and circuit-board schematics.

• Alignment and calibration: Head angular, Bi-D, PW and paper-feed adjustments, PF/FD belt tension, motor heat protection, and BRS/PFP correction.

The manual is written for experienced repair technicians, and Epson specifies that repairs should be performed only by Epson-certified technicians.

Printhead, Paper Feed, and Ink System

Factory explanations trace the F-Mach Turbo 2 printhead, carriage drive, and paper transport mechanisms. The Front ASF paper feeding path and Duplex unit paper feeding path diagrams explain the separate transport routes.

Repair procedures cover the carriage, PF and EJ rollers, rear ASF/change lever, automatic platen gap mechanism, and motor-driven CD-R guide. Reassembly notes include screw torques, cable routing, gear alignment, and required adjustments.

Printhead replacement requires a new cartridge-cover hinge because the original is permanently fitted and destroyed during removal. The manual identifies upper-housing removal tool 1108202 as an alternative that allows printhead replacement without removing the middle housing.

Fault Isolation and Electrical Reference

Troubleshooting tables separate LCD-indicated faults from symptoms with no error message. They address carriage impacts, paper feed and ejection failures, missing dots, white streaking, scanner faults, and duplex errors, with checks linked to likely components and repair references.

Circuit coverage spans the main board, power supply, control panel, USB interfaces, and internal memory-card controller. Reference tables include PWM constant-current chopping data for the Mabuchi RS445PD-16175BR CR motor, sensor input thresholds, and regional power-supply specifications.

The Main Board Circuit Block Diagram and Connector Layout of Main Board support circuit tracing. Appended schematics cover C686 MAIN, C685 PANEL/PANEL-B, C685 PSB/PSE, and C685 STG boards.

Adjustments After Parts Replacement

The required-adjustment matrix distinguishes removal from replacement and identifies the adjustments needed for each assembly. This helps technicians plan the calibration work a repair requires, including different main-board replacement paths depending on whether EEPROM data can be recovered.

Banding Reduction System (BRS) and Paper Feed Amount Profile (PFP) correction require the Adjustment Program, a specified compatible scanner, and PFP Base Scale 1453980. The printer's internal scanner is among the supported options. The BRS/PFP Adjustment Flow and PFP Check Pattern Judging Standard explain how calibration results are assessed.

Scanner Service and Maintenance

The scanner section explains the CIS board, rod lens array, LED illumination, carriage motor, and encoder. It specifies label-matched CIS spacers and the FT (Function Test) program with a dedicated jig for scanner original adjustment. Adjustment software and physical jigs are separate from the PDF.

Loosening the scanner motor unit's protected screw can misalign the encoder and require replacement of the scanner unit. Grease contamination of the carriage timing belt can accelerate belt deterioration.

Maintenance covers printhead cleaning, waste ink pad replacement and counter reset, plus lubricant codes and illustrated application points. Internal electrical repair requires the manual's power-isolation and static-discharge precautions.

PDF Contents and Included Reference Sheets

One printable English-language PDF contains 207 pages in total: 188 service-manual pages, including the cover, preliminary pages, and connector appendix; six exploded-view sheets; three parts-list pages; and ten electrical circuit sheets. All 19 appended reference pages are already included in the total.