Bi-D Adjustment - Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual

EPSON Stylus COLOR 680/777/777i
5. Choose the "Input head ID" item in the Head ID menu and click the OK button.
Following Head ID input menu is displayed.
Figure 5-6. Entering the 11 digits Head ID
6. Input a 11-digit code of the Head ID in the above menu.
In case you input the incorrect character or symbol in this menu,
this program detects it automatically and displays error message in the bottom
column. Figure 5 shows you the one of the error message.
Figure 5-7. Error message in the Input head ID menu
Adjustment
7. When the Head ID is input and write to the EEPROM, the following message is
displayed on the bottom column in the menu.
Figure 5-8. Completing the Head ID input

5.1.6 Bi-D Adjustment

You perform this adjustment to correct differences in printing positions, which is
caused by incorrect of printing timing in right and left directions during the Bi-
directional printing. Therefore, you are required to perform this adjustment after
performing the following operations.
n Replacing the Print mechanism
n Replacing the main board
n Replacing the CR motor
n Replacing the Carriage Assembly
n Replacing the Prinzzthead
Overview
Revision B
105