Epson 836XL - Manual (Page 31)

Using Optional Equipment Page 31
Removing the Shipping Screws
To prevent damage during shipping, shipping screws are
attached to the TPU to secure its lamp assembly. You must
remove these screws before using the TPU.
1 Turn the TPU so the glass side faces up.
2 Use a Phillips head (cross head) screwdriver to remove
both shipping screws from the holes labeled CLAMP, as
shown below.
Caution:
If a screw is left in
an outer hole while
using the TPU, the
TPU may be
damaged.