D-Link KX-TDA100 - Manual (Page 47)

2.2 Installation of the Hybrid IP-PBX
Installation Manual 47
2. Turn the 4 screws anticlockwise to loosen them.
3. Pull the release lever in the direction of the arrow to disconnect the PSU from the back board.
4. Replace the PSU.
5. Follow the steps in "Installing the Power Supply Unit".
Screws
Release Lever
Back Board
Current PSU New PSU