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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 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:
• Connector pin assignments
• Electric circuit boards components layout
• Electrical circuit boards schematics
• Exploded diagram & Parts List

FORMAT: High resolution PDF document!

Zip archive: PdF document 9 416 kB

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

joe sanabria

2012-11-21 20:22:04

Hi john: I wouldlike to let you know that i bought another reset key from yoy site and it worked with onother workforce 840 I owned. i think the problem with the other printer workforce 840 was that I used the reset key epson has in their website some times and probably it bloked the printer. Just for you to know and to let you know this time worked with another 840 I own Thank you for your understanding and for refunding the money when did not work. It says a lot of you business reputation

Wesley Pritchard	2004-02-07 21:55:21
The only way to really adjust you printer is by using this program. The owner the printer could not adjust the print using the regular adjustmest utility incleuded in the printer drivers. But this program did the trick. The printer is perfectly adjusted and the owner is very happy with the printer now.

Sabrina Mandelli	2019-09-20 10:56:10
Thank you, thank you...counter resetted...woww...thank you so much!!!!!Sabrina

Jean-Louis Boulin	2020-08-03 18:51:10
Good job THX ! My Epson ET-2550 working again Best regards

fernando rocha	2025-01-02 21:35:28
It works. Just purchased a one time counter reset license for my Epson L380. Immediately after payment with credit card (electronic version for web shopping) , I got the key number and used to reset the printer. Worked like a charm

Kork Little	2021-01-02 17:18:01
You made my day, it is now working. Thanks for your help. Enjoy your day!