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This Epson Service Manual and Parts Catalog describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer.

This manual consists of 6 chapters and Appendix.

CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.

CHAPTER 2. OPERATION PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3. TROUBLESHOOTING
Describes the step-by-step procedures for the troubleshooting.

CHAPTER 4. DISASSEMBLY / ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENT
Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

APPENDIX Provides the following additional information for reference:
• Electrical circuit boards schematics

FORMAT: High resolution PDF document!

PARTS LISTS
Zip archive: 28 900 kB PdF document 67 746 kB

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We are in business since 2002 and do our best to give our customers perfect service!

Alan Perelman	2010-09-03 12:48:33
I am well pleased with your product and will recomend it to as many as possible...

Colin Lyne	2025-05-27 19:17:17
Excellent. Easy to replace pads, following instructions, and key reset a breeze

Alexey Scherbenko

2020-01-15 16:42:26

HELLO!!! Today I bought a key for updating the firmware of my SC P-600 printer. After activ ating the key, WIC started updating the firmware and the message "ROM is not writeable" popped up on the printer screen. Now when I power on printer - I get "Recovery mode". What can I do now?! ======Answer======== Please read how easily and quickly it can be solved - www.wic.support/epson-wf-3720-stuck-in-recovery-mode-quick-and-esy-solution/

SAUL ACOSTA	2010-09-26 01:51:12
That was very simply to use. I saved my printer life in 5 minutes. Thank you!

Jhazmin Raya

2020-08-18 20:35:17

I have modified the firmware of an Epson wf3620 with the firmware key to make the printer run with chipless ink cartridges. The instructions were clear but must be followed exactly in order for the process to be successful. I am very happy with the result as I have the freedom to use oem ink or not depending on my needs. No oem cartridges now work perfectly well. Well done wic utility people. regds, Peter.