Power Unit Installation Modifications
10-6 Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
Removing the Power Unit 1. Turn off the power switch on the back of the main unit (if re dundant, only the
power switch of the power unit to be removed).
2. Remove the power cable from the connector and remov e the fast ening scr e ws.
3. Remove the front cover.
4. Turn the screws on both ends of the power unit cover and remove the cover.
5. Hold the power unit securely with both hands as shown in F igu re 10-7 and
remove it slowly.
Figure 10-7: Removing the Power Unit
Be sure to turn the power off before inserting or removing the power unit.
Leaving the power on while inserting or removing the power unit may cause
the unit to fail.
6. Install the power unit cover and securely fas ten wi th th e scr e ws on both e nds .
Make sure the right side is up when installing the power unit cover.
7. Install the front cover.
If the power unit is redundant and one power unit is in operation, the other power
unit can be inserted or removed without affecting the switching functions of the
main unit.