This manual is in the english language, in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Epson.
Table of contents:
Chapter 1. Troubleshooting
Chapter 2. Disassembly/Reassembly
Chapter 3. Adjustment
Chapter 4. Maintenance
Chapter 5. Refurbishment
Chapter 6. Appendix
WF4740, WF4730, WF4720, EC4040, EC4030, EC4020