Epson Stylus Pro 7800 User Manual page 270

3. Turn the lever to unlock the movable unit, and then slide it to
the left so that the flange knob clears the end of the take-up
reel core. While doing this, support the take-up reel core with
one hand to keep it from falling.
4. Remove the take-up reel core from the flange knob on the
movable unit.
5. Similarly, remove the take-up reel core from the flange knob
on the drive unit.
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