Epson LQ-870 Service Manual page 73

3.2.3.2 Removing the Main Board (C060 MAIN Board)
1. Remove the upper case, as described in Section 3.2.2.2.
2. Remove the mechanism unit, as described in Section 3.2.4.
3. Remove the driver board, as described in Section 3.2.3.1.
4. Disconnect CN4 and CN6 from the main board.
5. Remove the 3 CBB(C) (M3 X 12) screws and 2 CB (Ml X 8) screws that hold the main board to the
lower case: then remove the main board.
C B
After replacing the main board, you must adjust the bidirectional print position to ensure that bidirectional
printing is correctly aligned. (See Section 4.2.)
CB(M3 - 8) Scre
Figure 3-7. Removing the CO60 MAIN Board
Assembly and Adjustment Note
CO60 MAIN Board
3-8