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This Service Manual 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 DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. TROUBLESHOOTING
CHAPTER 4. DISASSEMBLY / ASSEMBLY
CHAPTER 5. ADJUSTMENT
CHAPTER 6. MAINTENANCE
APPENDIX Provides the following additional information for reference:
• Electric circuits
• Exploded diagram

FORMAT: High resolution PDF document!

Zip archive: PdF document 11 935 kB

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

grigri zine	2005-06-15 02:53:35
i just wnna thank u for ur gret websit becoz its so easy and shortly . by other wise i need u to info me about service manual if it has trouble codes and diagnostic and troubleshooting procedures ?......thanx

Lothar Hennig	2012-01-08 15:51:25
Hat alles super geklappt und sogar ohne große Englisch Kenntnisse. Bin begeistert immer wieder.

Peter Machado	2018-12-10 18:02:55
Thank you worked ok

MIZIKE G.

2025-11-14 16:23:29

11-14-2025 - I JUST USED THE DOWNLOADED UTLITY PROGRAM AND BOUGHT THEIR $9.99 CODE FOR PURPOSE OF RESETTING THE INK WASTE COUNTER BULLSHIT ( EPSON ET-4550 SEVERAL YEARS OLD ) WHICH I NEVER HEARD OF UNTIL LAST WEEK WHEN THE PRINTER WOULDN'T DO ANYTHING BUT TELL ME TO CONTACT EPSON. LOL- NOPE - CHAT GTP GAVE ME THE INFO FROM HERE, USED IT AND WORKED - TOOK ABOUT 5 MINUTES - ( I HOWEVER - DIDNT ACTUALLY CLEAN OR EMPTY THE INK WASTE OR WHATEVER - IM HOPING FOR THE BEST, ASSUMING ITS OLD ENOUGH THAT IT HAS DRYED ON ITS OWN. - THIS PART ISNT RECCOMENDED TO MY UNDERSTANDING - BUT ILL FIND OUT I SUPPOSE) BUT LONG STORY SHORT - EAST TO USE DOWNLOADED UTILITY, AND RESET KEY FOR 10 BUCKS WORKED - ABOUT 5 MINUTES OR LESS PROCESS. REAL SHIT - MIZIKE

tom tannenberger	2003-12-13 07:25:09
I figured it out. I ended up purchasing the LJ 1100 manual. I just used a different email address and it worked fine. Btw, the service manual helped me out tremendously! It paid for itself easily. I will definitely be using your service manuals again in the future. Thanks,

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.