BT Versatility - Manual (Page 45)

BT Versatility
Installation and maintenance Manual
44
Replacing the CCU MDF
This PCB is NOT hot swappable. The System must be powered down to change
this board
ESD precautions must be made when replacing this board. Connect to the ESD
pillar on the CCU MDF before removing the CCU cover
The procedure to be used when replacing the CCU MDF unit is:
1. Power the system down by unplugging it at the mains.
2. If a battery is installed turn off the BBU switch to disconnect the battery.
3. Remove any voice or network modules installed.
4. Remove the MDF Cabling making sure to tag the cabling so they can be readily reinstalled
5. Open the CCU main cover by opening the four-quarter turn screws indicated in the first diagram
below.
6. Remove the 008 PCB
7. Remove the retaining screw in the MDF PCB
8. Remove the MDF PCB
9. Reverse the above procedure to install a new MDF PCB