QNAP TVS 72N Series User Manual page 27

6. Remove the power supply unit.
Warning
To avoid potential injury or damage to components, ensure that the drives and other internal
system components have cooled before touching them.
a. Disconnect the power supply cables.
b. Remove the screws that secure the unit to the chassis.
c. Remove the unit from the chassis.
TVS-x72N User Guide
Hardware Installation 26