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Power supply unit spare fuse
A spare fuse is located in the power supply unit. It is in a holder directly below the installed fuse. If there is no
power being supplied to the unit, check if the fuse is blown using the following procedure:
1.
If a battery is installed, turn off the BBU switch.
2.
Power the system down by unplugging it at the main AC power source.
3.
Remove any Voice or CO Line Modules.
4.
Open the CCU main cover by opening the four "quarter turn" screws as shown in page 51.
5.
Check the fuse on the power supply.
6.
If it is blown, replace it with the spare fuse.
Note: Reverse the above procedure to install a new PCB.
Installation and Maintenance Manual
EncoreCX
63
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