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Replacing faulty PCBs
Replacing the 008 extension board
If a fault occurs on the first eight extensions, the 008 extension PCB must be replaced.
This PCB is NOT hot swappable. The system must be powered down to change
this board.
The procedure in replacing the 008 PCB is:
Electrostatic precautions must be taken when replacing this board. Connect to
the ESD pillar on the CCU before removing the CCU cover.
1.
If a battery is installed, turn off the BBU switch.
2.
Power the system down by unplugging it at the main AC power supply.
3.
Remove any Voice Mail or CO Line Modules installed.
4.
Open the CCU main cover by releasing the four "quarter turn" screws indicated in the first diagram
below.
5.
Remove and replace the 008 card as indicated in the second diagram.
6.
Replace the cover.
7.
Replace any Voice or CO Line Modules.
8.
Replace the cover and power the system up.
Installation and Maintenance Manual
EncoreCX
61
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