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Epson L655 / L656, Epson ET-4550 Adjustment Program, Service Manual, Parts List

Adjustment Program is utility software for resetting Epson printers due to replacement (repair) of one or more spare parts so that satisfactory print quality can be maintained after replacement (repair) of spare parts. As for replacement or repair of spare parts that require an Adjustment Program, among others, replacement of: Main board, print head, CR motor, Carriage Assy, PCB Encoder, Power Supply Unit, Timing Belt, EJ Roller, LD Roller Assy, Waste ink pad assy, ​​​and others.

Adjustment Program Epson L655 - ECC ver.1.0.2

In the Adjustment Program there are various kinds of adjustment items. These adjustment items can be done sequentially (Sequential adjustment mode) or done separately (Particular adjustment mode). In the Sequential adjustment mode, you choose the parts to be replaced (repaired) and you will automatically be guided to make the adjustment items that must be done in the correct order. While the Particular adjustment mode, you choose the adjustment item you want to do. These two main menus are used because one or more printer parts are replaced (repaired), so that the printer works normally with the new parts installed.

Adjustment Program is a portable software that supports Windows Operating System (10, 8, 7, Vista, XP) and can be used to reset the printer if the printer is connected to the computer with a USB cable (not Wireless). The following is the Adjustment Program for the Epson L655 / L656, Epson ET-4550.


Adjustment Program, Service Manual, Parts List


Epson L655/L656, ET-4550 Service Manual Rev. C
Epson L655 / L656, ET-4550 Service Manual Rev. C
Revision: C
Date of issue: May 9, 2016
Download (sorry, we don't have this file)


Epson L655/L656, ET-4550 Service Manual Rev. D
Epson L655 / L656, ET-4550 Service Manual Rev. D
Revision: D
Date of issue: June 15, 2016


Epson L655 / L656 / ET-4550 Parts List
Epson L655 / L656 / ET-4550 Parts List
Support printer: Epson L655 / L656 / ET-4550




Adjustment Program Epson L655

There are three Epson L655 Adjustment Programs, choose one:
1.   Adjustment Program Epson L655 - ECC ver.1.0.2
2.   Adjustment Program Epson L655 - ESP ver.1.0.0
3.   Adjustment Program Epson L655 - ESP ver.1.0.2


Adjustment Program Epson L655 - ECC ver.1.0.2
Adjustment Program Epson L655 - ECC ver.1.0.2
Destination: ECC
Version: 1.0.2


Adjustment Program Epson L655 - ESP ver.1.0.0
Adjustment Program Epson L655 - ESP ver.1.0.0
Destination: ESP
Version: 1.0.0


Adjustment Program Epson L655 - ESP ver.1.0.2
Adjustment Program Epson L655 - ESP ver.1.0.2
Destination: ESP
Version: 1.0.2



Adjustment Program Epson L656

We don't have Adjustment Program for Epson L656. Instead, use the Epson L655 Adjustment Program. This is based on the similarities between the two printers (L655 / L656) which are mentioned in the Service Manual and Parts List documents. Here's how to use the Epson L655 Adjustment Program instead of the Epson L656 Adjustment Program.


Adjustment Program Epson L656 - ECC ver.1.0.2

How to use Adjustment Program Epson L656
Adjustment Program Epson L656 - ECC ver.1.0.2
Destination: ECC
Version: 1.0.2


Adjustment Program Epson L656 - ESP ver.1.0.0

How to use Adjustment Program Epson L656
Adjustment Program Epson L656 - ESP ver.1.0.0
Destination: ESP
Version: 1.0.0


Adjustment Program Epson L656 - ESP ver.1.0.2

How to use Adjustment Program Epson L656
Adjustment Program Epson L656 - ESP ver.1.0.2
Destination: ESP
Version: 1.0.2




Adjustment Program Epson ET-4550

Sorry, we don't have Adjustment Program for Epson ET-4550, but because Epson L655 / L656 and Epson ET-4550 have the same basic engine (see Service Manual and Part Lists document), it is possible that Epson L655 Adjustment Program can be used for Epson ET -4550. Although we cannot confirm that the Epson L655 Adjustment Program can be used for the Epson ET-4550, but you can try it, by following the instructions below.
How to use AdjProg Epson ET-4550




Questions and Answers

QError Code: 20000xxx when using the Adjustment Program. What to do?
A: Communication error! Error Code: 20000xxx occurs because the printer is not ready to accept commands from the Adjustment Program because it is still busy processing the previous command.
Communication error! Error Code xxxxxxxx when use Epson Adjustment Program

So when the printer receives the command example Main pad counter - Check, the power light will blink for about 60 seconds. The printer can process the next command example Main pad counter - Initialization after 60 seconds have passed. Communication error! Error Code: 20000xxx occurs because the second command "Main pad counter -> Initialization" is done while the printer is still processing the previous command. So wait for the power light to stop flashing, then run the next command.


When there is damage to the Epson printer and requires replacement of spare parts, after the damaged parts are replaced, then use the Adjustment Program to reset the printer so that it can work optimally with new spare parts. If you are having trouble repairing a faulty printer yourself, we recommend contacting an Epson Authorized Customer Service Center.

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