Epson WorkForce 1100, Stylus Office T1110/B1100/T1100 and ME Office 1100 Printer Service Manual (P/N SEIJ09-003)

This Epson service manual (SEIJ09-003, Rev. A, first release) covers the WorkForce 1100, Stylus Office T1110, B1100 and T1100, and ME Office 1100 color inkjet printers.

• Troubleshooting: LED and STM3 error indications, communication failures, paper-feed faults, cartridge recognition problems, print-quality defects, and abnormal-noise diagnosis.

• Boards and connections: Main Board and Power Supply Board removal and installation, connector identification, and motor and sensor checks.

• Printhead and ink system: Printhead and CSIC Assy replacement, Ink System Unit removal, waste-ink pad service, and protection-counter functions.

• Carriage and paper feed: Carriage Shaft, APG Assy, ASF Assy, rollers, CR Motor, encoders, and paper-sensor removal and reassembly.

• Adjustments: EEPROM data copy, Head ID input, Bi-D and head angular adjustments, PG adjustment, PF belt tensioning, and adjustment-pattern evaluation.

• Maintenance: Cleaning guidance, specified lubricants and application points, and the Work Completion Checklist for checking printer operation after repair.

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

Error Diagnosis and Electrical References

Thirteen tables organize errors and observed faults by timing, affected assembly, check point, and remedy. The print-quality section addresses missing dots, mixed colors, banding, ink stains, graininess, and borderless-printing faults.

Operating-principles coverage explains the F3-3 Mach Turbo II printhead, power-on sequences, and media-dependent PG settings. Carriage-movement drawings, the Motors and Sensors Layout, nozzle-check patterns, and temperature/humidity charts provide supporting references.

The Main Board connector layout and Connection of the Major Components diagram identify connections for the CA58 MAIN board, C698 PSB/PSE power supply, and relay boards. Electrical coverage includes motor-resistance specifications and sensor signal states. Exploded diagrams and a parts list are not included.

Working with internal printer power supplies involves exposure to potentially hazardous voltage. Always disconnect the unit from power sources and employ proper grounding techniques to prevent static discharge damage to circuit boards before initiating any internal access.

Disassembly and Adjustments After Repair

The Disassembly Flowchart links access paths to the illustrated procedures. Reassembly notes cover chassis screw torques, cable routing, and APG phase alignment. Handling cautions explain how lifting the printer mechanism at the wrong points can deform its frame.

Required adjustments: The Required Adjustment List distinguishes removal from replacement and successful EEPROM recovery from cases where data cannot be read. This helps technicians identify the calibration work required after a specific repair. Failed EEPROM recovery during Main Board replacement also requires replacement of the Waste Ink Tray Assy.

USB ID setup, PW/first-dot positioning, BAND printing, PF corrections, and motor heat-protection settings are documented alongside the alignment routines. Software-based adjustments require Epson's Adjustment Program, which is not included in this PDF.

Mechanical adjustment tools: The manual identifies PG Adjustment Gauge 1276333 and PF Tension Measuring Tool 1294120. PF Roller Shaft position adjustment uses Jig 1304993 with Level Block 1304994. The belt-tension notes explain how excessive loading can overheat the PF motor and burn its coil.

Waste-Ink Service and Lubrication

Protection Counter A tracks the Waste Ink Tray Assy; Counter B tracks the Front Paper Guide Pad Tray. The maintenance instructions pair pad replacement with the corresponding counter reset.

Lubrication references specify G-26, G-45, G-71, G-74, and G-75, with illustrated application points and quantities for the carriage shaft, ASF, and other mechanisms. The Work Completion Checklist covers nozzle output, carriage travel, paper feeding, adjustment completion, and lubrication before return to service.

Examples of Motor and Belt-Tension Specifications

These values are a small selection of the electrical and mechanical specifications provided for the covered printers.

The ASF motor winding resistance is 7.0 Ω ± 10% per phase at 25°C; the pump motor specification is 10.3 Ω ± 10% under the same conditions.

The PF drive belt has a standard tension of 10.5 ± 2 N. Its adjustment section documents measurement with the PF Tension Measuring Tool to control motor loading and maintain paper-feed accuracy.

PDF Navigation and Included Pages

Text search and diagram detail: Body text is searchable, with embedded bookmarks for chapters and subsections. Some diagram labels are not searchable. Small connector identifiers in the electrical overview are legible when zoomed.

Supplied as one printable, 162-page PDF in English. The total includes six preliminary pages—cover, precautions, manual overview, revision record, and two contents pages—and seven chapter/appendix divider pages.