TA Triumph-Adler DCC 2725 - Manual (Page 334)

Maintenance
9-10
6 Hold the new toner container in both hands and
gently push it in.
7 Turn the toner container release lever to the
horizontal position.
Use the same procedure to replace the other color
toner containers.
8 Close the front cover.
NOTE: Return the exhausted toner container and
waste toner box to your dealer or service
representative. The collected toner container and
waste toner box will be recycled or disposed in
accordance with the relevant regulations