Epson EPI-4000 User Manual page 134

Using Interface Boards
4. Grasp the clips on the parallel interface and pull the interface
tray straight out of the printer, as shown below.
5. Press in the plastic clips on the back of the shield plate and
remove the shield plate.
Note: Keep the shield plate and any other loose parts in a safe
place in case you want to remove the interface board later.
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