Epson LQ-500 User Manual page 105

The Interface Boards
6. Carefully disconnect the control panel cable from the connector
labelled CN4 on the main board, as shown below. Then lift off
the cover and set it aside.
7. Remove the shield plate on the back of the printer by pressing
in on the plastic clips located at the back of the plate.
8. Using a cross-head screwdriver, remove the screw labelled CG
(shown on the next page) from the main board. Then set it aside
in a safe place.
A-6 Appendix