Replacing The Ccu Mdf - BT Versatility Installation And Maintenance Manual

BT Versatility
Installation and Maintenance Manual
Replacing Faulty PCBs

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.
44