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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!

Miguel Angel Servin Espinoza	2007-12-21 19:47:47
Perfecto espero la compra se la mejor, les agradezco de antemano sus atenciones

Bonnie Richard	2025-04-20 10:32:28
Thank you so much. Purchased key followed instructions for reset everything working fine except cannot get ink flowing. Have used cleaner twice, nozzel clean, purge, still not working. Any suggestions? ET-2760

HADAD HADDAD	2023-06-04 19:35:41
please reset my key my key is 522EDAZCZ9Z2273C thank you -----------Reply----------- Key is for one use only and can not be reset. You need new key.

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

James Whiting	2016-07-07 06:27:39
You all rock! Keeping a favorite printer alive! Thanks again😎...it\'s beyond its stated life span, but the reset key resolved my bw issues...it\'s breathing and printing true again after 2 months of frustration! Tony