Samsung DV400EWHD Series Service Manual page 26

Part
Duct exhaust
Removal
Reassembly procedures are in the reverse order of dissasembly procedures.
24 _ Disassembly and Reassembly
figure
1. Disconnect the power supply to the unit.
2. Remove 1 screws from the Back-Cover.
3. Remove 1 screw from the Duct-Exhaust.
Description
In case the screws for fixing a power code are
dropped into the dryer, after removing Duct
Exhaust, you can put it out through the hole.